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Integration guide (Bora/BoraX/BoraLite)

25,636 bytes removed, 10:11, 18 October 2019
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Power consumptions related to some real world use cases can be found here. [TBD insert link]
=== Main SD/MMC interface ===
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=== Connecting the PUDC_B pin ===
 
On Bora SOM, PUDC_B pin is (J2 connector, pin 15) connected to VDDIO_BANK34 (3.3V) via 10K resistor, thus [http://www.xilinx.com/support/answers/50802.html internal pull-up resistors are disabled on each SelectIO pin, until FPGA configuration completes].
 
Default behavior can be changed by appropriate circuitry at carrier board level to set it to logical 0.
 
=== PS' I²C buses ===
[[File:Bora-i2c-glitch-filter.png|thumb|center|600px]][[File:BoraLite-i2c-glitch-filter.jpg|thumb|center|600px]] 
(1) What here described refers to I2C0 controller that by default is routed on pins MIO46 and MIO47.
==== How to implement workaround suggested by Xilinx on BoraEVB====
[[''Reference Plase note that the reference project with I2C glitch filter implemented in FPGA is available on request.Plase contact [mailto:support-bora@dave.eu support-bora@dave.eu]'']]
This project, built with Vivado 2014.4, is based on the default project for BELK (BORA rev.B and BORAevb rev.A).
The BANK35 MUST be powered at 1.8V
===== Test on BoraEVB =====
To test the solution, please make these connections on BORAevb rev.A:
* 1.8V supply for BANK35 : (J11.2 to J11.7)
* I2C SDA : JP10.16 to JP21.3
=== PL bank 34 == Test on BoraXEVB =====Routing implemented To test the solution, please make these connections on Bora SoM allows the use of bank 34's signals as differential pairs as well as single-ended linesBoraXEVB:* 1. Signals are grouped as denoted by the following table that details routing rules 8V supply for BANK35 : please refer to VDDIO_BANK35 possibility on Bora moduleBoraXEVB schematics* populate RPACK RP87* I2C SCL : JP30. No carrier board guidelines can be provided, because these are application-dependent9 to JP29.5* I2C SDA : JP30.11 to JP29.3
Pairs are highlighted with different colors. When used as differential pairs, differential impedence is 100 Ohm. When used as single-ended signals, impedence is 50 Ohm.===Programmable logic (PL)===For Bora SOM please refer to the following links:*[[Programmable_logic_(Bora)#Routing_information|bank 34]]*[[Programmable_logic_(Bora)#Routing_information_2|bank 35]]*[[Programmable_logic_(Bora)#Routing_information_3|bank 13]]
{| class="wikitable" border="1"| align="center" style="background:#f0f0f0;"|'''Bora pin name'''| align="center" style="background:#f0f0f0;"|'''Individual trace length<br>For BoraX SOM please refer to the [[mils]'''| align="center" style="background:#f0f0f0;"Programmable_logic_(BORAXpress)|'''Intra-pair match<br>[milspage]'''| align="center" style="background:#f0f0f0;"|'''Inter-pair match<br>[mils]'''| align="center" style="background:#f0f0f0;"|'''Group name'''|-| IO_L1N_T0_34||align="center"|1751,37||align="center"|25||align="center"|300||BANK34 Diff group 1|-| IO_L1P_T0_34||align="center"|1749,02||align="center"|25||align="center"|300||BANK34 Diff group 1|- style="background: gray"| IO_L2N_T0_34||align="center"|1625,68||align="center"|25||align="center"|300||BANK34 Diff group 1|- style="background: gray"| IO_L2P_T0_34||align="center"|1624,91||align="center"|25||align="center"|300||BANK34 Diff group 1|-| IO_L4N_T0_34||align="center"|1581,72||align="center"|25||align="center"|300||BANK34 Diff group 1|-| IO_L4P_T0_34||align="center"|1582,11||align="center"|25||align="center"|300||BANK34 Diff group 1|- style="background: gray"| IO_L5N_T0_34||align="center"|1769,81||align="center"|25||align="center"|300||BANK34 Diff group 1|- style="background: gray"| IO_L5P_T0_34||align="center"|1776,23||align="center"|25||align="center"|300||BANK34 Diff group 1|-| IO_L7N_T1_34||align="center"|1566,52||align="center"|25||align="center"|300||BANK34 Diff group 1|-| IO_L7P_T1_34||align="center"|1569,36||align="center"|25||align="center"|300||BANK34 Diff group 1|- style="background: gray"| IO_L9N_T1_DQS_34||align="center"|1490,25||align="center"|25||align="center"|300||BANK34 Diff group 1|- style="background: gray"| IO_L9P_T1_DQS_34||align="center"|1498,04||align="center"|25||align="center"|300||BANK34 Diff group 1|-| IO_L10N_T1_34||align="center"|1516,97||align="center"|25||align="center"|300||BANK34 Diff group 1|-| IO_L10P_T1_34||align="center"|1517,37||align="center"|25||align="center"|300||BANK34 Diff group 1|- style="background: gray"| IO_L15N_T2_DQS_34||align="center"|1610,74||align="center"|25||align="center"|300||BANK34 Diff group 1|- style="background: gray"| IO_L15P_T2_DQS_34||align="center"|1602,81||align="center"|25||align="center"|300||BANK34 Diff group 1|-| IO_L16N_T2_34||align="center"|1601,55||align="center"|25||align="center"|300||BANK34 Diff group 1|-| IO_L16P_T2_34||align="center"|1616,03||align="center"|25||align="center"|300||BANK34 Diff group 1|- style="background: gray"| IO_L17N_T2_34||align="center"|1574,33||align="center"|25||align="center"|300||BANK34 Diff group 1|- style="background: gray"| IO_L17P_T2_34||align="center"|1593,38||align="center"|25||align="center"|300||BANK34 Diff group 1|-| IO_L18N_T2_34||align="center"|1740,11||align="center"|25||align="center"|300||BANK34 Diff group 1|-| IO_L18P_T2_34||align="center"|1750,54||align="center"|25||align="center"|300||BANK34 Diff group 1|- style="background: gray"| IO_L20N_T3_34||align="center"|1588,01||align="center"|25||align="center"|300||BANK34 Diff group 1|- style="background: gray"| IO_L20P_T3_34||align="center"|1585,53||align="center"|25||align="center"|300||BANK34 Diff group 1|-| IO_L21N_T3_DQS_34||align="center"|1567,1||align="center"|25||align="center"|300||BANK34 Diff group 1|-| IO_L21P_T3_DQS_34||align="center"|1570,96||align="center"|25||align="center"|300||BANK34 Diff group 1|- style="background: gray"| IO_L22N_T3_34||align="center"|1619,26||align="center"|25||align="center"|300||BANK34 Diff group 1|- style="background: gray"| IO_L22P_T3_34||align="center"|1622,13||align="center"|25||align="center"|300||BANK34 Diff group 1|-| IO_L23N_T3_34||align="center"|1769,71||align="center"|25||align="center"|300||BANK34 Diff group 1|-| IO_L23P_T3_34||align="center"|1775,52||align="center"|25||align="center"|300||BANK34 Diff group 1|- style="background: gray"| IO_L24N_T3_34||align="center"|1772,07||align="center"|25||align="center"|300||BANK34 Diff group 1|- style="background: gray"| IO_L24P_T3_34||align="center"|1774,49||align="center"|25||align="center"|300||BANK34 Diff group 1|-style="background: black"| ''' '''|||||||||-| IO_L11N_T1_SRCC_34||align="center"|1817,43||align="center"|10||align="center"|50||BANK34 xRCC group|-| IO_L11P_T1_SRCC_34||align="center"|1823,9||align="center"|10||align="center"|50||BANK34 xRCC group|- style="background: gray"| IO_L12N_T1_MRCC_34||align="center"|1844,2||align="center"|10||align="center"|50||BANK34 xRCC group|- style="background: gray"| IO_L12P_T1_MRCC_34||align="center"|1841,36||align="center"|10||align="center"|50||BANK34 xRCC group|-| IO_L13N_T1_MRCC_34||align="center"|1811,51||align="center"|10||align="center"|50||BANK34 xRCC group|-| IO_L13P_T1_MRCC_34||align="center"|1818,58||align="center"|10||align="center"|50||BANK34 xRCC group|- style="background: gray"| IO_L14N_T2_SRCC_34||align="center"|1818,78||align="center"|10||align="center"|50||BANK34 xRCC group|- style="background: gray"| IO_L14P_T2_SRCC_34||align="center"|1822,02||align="center"|10||align="center"|50||BANK34 xRCC group|-|}.
About power voltage, take into consideration that Bank 35 is fixed at 3.3VFor BoraLite SOM please refer to the [[Programmable_logic_(BoraLite)|page]].
=== PL bank 35 Traces length matching===On Bora sideA spreadsheet is available for download here, containing detailed information about signals routing of bank 35 has been optimized to interface 16-bit DDR3 SDRAM memory devices, clocked at a maximum frequency of 400 MHz.Signals have been grouped in the following classes:* FDDR_ADDR* FDDR_CK* FDDR_BYTE0* FDDR_BYTE1Some of them are differential pairs. These kind information can be used to check nets matching of signals are highlighted in dark grey in the following sections where, for each signal, detailed information are provided, related to routing rules implemented on Bora SoM and overall system (carrier board guidelines+ SOM).
Following tables indicates general recommended rules for single-ended and differantial pairs on carrier board in terms of impedence and isolation. Differential pairs:{| class="wikitable" border="1"| align="center" style="background:#f0f0f0;"|''' '''| align="center" style="background:#f0f0f0;"|''' Value '''| align="center" style="background:#f0f0f0;"|''' UOM '''|-| Common Mode impedance typ||align="center"|55||align="center"|Ohm|-| Differential Mode impedance typ||align="center"|100||align="center"|Ohm|-| Isolation||align="center"|4x||align="center"|gap|-|} Single-ended signals:{| class="wikitable" border="1"| align="center" style="background:#f0f0f0;"|''' '''| align="center" style="background:#f0f0f0;"|''' Value '''| align="center" style="backgroundFor Bora/BoraEVB systems:#f0f0f0;"|''' UOM '''|-| Common Mode impedance typ||align="center"|55||align="center"|Ohm|-| Isolation||align="center"|2x||align="center"|width|-|} About power voltage, Bank 35 is configurable and must be powered by carrier board. Please note that some signals belonging to this bank can be configured alternatively as XADC auxiliary analog inputs.===== FDDR_ADDR class =====Following table details routing rules implemented on Bora SoM and suggested carrier board guidelines for FDDR_ADDR class signals. The picture shows connection scheme and the nomenclature used in the table. [[File:FDDR_ADDRBora-routing.pngzip]].
For BoraX/BoraXEVB systems: [[File:BoraX-BoraXEVB-combined-routing.zip]].
{| class="wikitable" border="1"! align="center" style="background:#f0f0f0;" rowspan="2" | '''Bora pin name''' ! align="center" style="background:#f0f0f0;" rowspan="2" | '''Group name'''! align="center" style="background:#f0f0f0;" rowspan="2" | '''Carrier board net name'''! align="center" style="background:#f0f0f0;" colspan="3" | '''SoM routing rules and specifications'''! align="center" style="background:#f0f0f0;" colspan="6" | '''Carrier board guidelines'''|-! align="center" style="background:#f0f0f0;" | '''Actual length<br>[mils]'''! align="center" style="background:#f0f0f0;" | '''Max length match<br>[mils]'''! align="center" style="background:#f0f0f0;" | '''Nominal max length<br>[mils]'''! align="center" style="background:#f0f0f0;" | '''AD_A2 length match<br>[mils]'''! align="center" style="background:#f0f0f0;" | '''AD_AT length match<br>[mils]'''! align="center" style="background:#f0f0f0;" | '''AD_AS1 length match<br>[mils]'''! align="center" style="backgroundFor BoraLite/BoraXEVB systems:#f0f0f0;" | '''AD_AS1 max length<br>[mils]'''! align="center" style="background:#f0f0f0;" | '''AD_AT max length<br>[mils]'''! align="center" style="background:#f0f0f0;" | '''AD_A2+AD_AS1 max length<br>[mils]'''|-|IO_L17N_T2_AD5N_35||FDDR_ADDR||FDDR_ADDR_3||align="center"|1832||align="center"|80||align="center"|1912||align="center"|40||align="center"|100||align="center"|50||align="center"|60||align="center"|400||align="center"|2100|-| IO_L20P_T3_AD6P_35||FDDR_ADDR||FDDR_BA_2||align="center"|1853,4||align="center"|80||align="center"|1912||align="center"|40||align="center"|100||align="center"|50||align="center"|60||align="center"|400||align="center"|2100|-| IO_L16N_T2_35||FDDR_ADDR||FDDR_ADDR_5||align="center"|1832||align="center"|80||align="center"|1912||align="center"|40||align="center"|100||align="center"|50||align="center"|60||align="center"|400||align="center"|2100|-| IO_L18N_T2_AD13N_35||FDDR_ADDR||FDDR_ADDR_1||align="center"|1832||align="center"|80||align="center"|1912||align="center"|40||align="center"|100||align="center"|50||align="center"|60||align="center"|400||align="center"|2100|-| IO_L24N_T3_AD15N_35||FDDR_ADDR||FDDR_CKE_0||align="center"|1834,3||align="center"|80||align="center"|1912||align="center"|40||align="center"|100||align="center"|50||align="center"|60||align="center"|400||align="center"|2100|-| IO_L23P_T3_35||FDDR_ADDR||FDDR_CAS_N||align="center"|1857,01||align="center"|80||align="center"|1912||align="center"|40||align="center"|100||align="center"|50||align="center"|60||align="center"|400||align="center"|2100|-| IO_L14N_T2_AD4N_SRCC_35||FDDR_ADDR||FDDR_ADDR_9||align="center"|1832||align="center"|80||align="center"|1912||align="center"|40||align="center"|100||align="center"|50||align="center"|60||align="center"|400||align="center"|2100|-| IO_L24P_T3_AD15P_35||FDDR_ADDR||FDDR_CS0_N||align="center"|1832||align="center"|80||align="center"|1912||align="center"|40||align="center"|100||align="center"|50||align="center"|60||align="center"|400||align="center"|2100|-| IO_L14P_T2_AD4P_SRCC_35||FDDR_ADDR||FDDR_ADDR_10||align="center"|1832||align="center"|80||align="center"|1912||align="center"|40||align="center"|100||align="center"|50||align="center"|60||align="center"|400||align="center"|2100|-| IO_L15P_T2_DQS_AD12P_35||FDDR_ADDR||FDDR_ADDR_8||align="center"|1832||align="center"|80||align="center"|1912||align="center"|40||align="center"|100||align="center"|50||align="center"|60||align="center"|400||align="center"|2100|-| IO_L15N_T2_DQS_AD12N_35||FDDR_ADDR||FDDR_ADDR_7||align="center"|1832||align="center"|80||align="center"|1912||align="center"|40||align="center"|100||align="center"|50||align="center"|60||align="center"|400||align="center"|2100|-| IO_L12N_T1_MRCC_35||FDDR_ADDR||FDDR_RESET_N||align="center"|1832||align="center"|80||align="center"|1912||align="center"|40||align="center"|100||align="center"|50||align="center"|60||align="center"|400||align="center"|2100|-| IO_L13P_T2_MRCC_35||FDDR_ADDR||FDDR_ADDR_12||align="center"|1832||align="center"|80||align="center"|1912||align="center"|40||align="center"|100||align="center"|50||align="center"|60||align="center"|400||align="center"|2100|-| IO_L13N_T2_MRCC_35||FDDR_ADDR||FDDR_ADDR_11||align="center"|1832||align="center"|80||align="center"|1912||align="center"|40||align="center"|100||align="center"|50||align="center"|60||align="center"|400||align="center"|2100|-| IO_25_35||FDDR_ADDR||FDDR_ODT_0||align="center"|1832||align="center"|80||align="center"|1912||align="center"|40||align="center"|100||align="center"|50||align="center"|60||align="center"|400||align="center"|2100|-| IO_L23N_T3_35||FDDR_ADDR||FDDR_WE_N||align="center"|1869,66||align="center"|80||align="center"|1912||align="center"|40||align="center"|100||align="center"|50||align="center"|60||align="center"|400||align="center"|2100|-| IO_L17P_T2_AD5P_35||FDDR_ADDR||FDDR_ADDR_4||align="center"|1832||align="center"|80||align="center"|1912||align="center"|40||align="center"|100||align="center"|50||align="center"|60||align="center"|400||align="center"|2100|-| IO_L22N_T3_AD7N_35||FDDR_ADDR||FDDR_RAS_N||align="center"|1832||align="center"|80||align="center"|1912||align="center"|40||align="center"|100||align="center"|50||align="center"|60||align="center"|400||align="center"|2100|-| IO_L20N_T3_AD6N_35||FDDR_ADDR||FDDR_BA_1||align="center"|1832||align="center"|80||align="center"|1912||align="center"|40||align="center"|100||align="center"|50||align="center"|60||align="center"|400||align="center"|2100|-| IO_L18P_T2_AD13P_35||FDDR_ADDR||FDDR_ADDR_2||align="center"|1853,7||align="center"|80||align="center"|1912||align="center"|40||align="center"|100||align="center"|50||align="center"|60||align="center"|400||align="center"|2100|-| IO_L16P_T2_35||FDDR_ADDR||FDDR_ADDR_6||align="center"|1832||align="center"|80||align="center"|1912||align="center"|40||align="center"|100||align="center"|50||align="center"|60||align="center"|400||align="center"|2100|-| IO_L22P_T3_AD7P_35||FDDR_ADDR||FDDR_BA_0||align="center"|1850,82||align="center"|80||align="center"|1912||align="center"|40||align="center"|100||align="center"|50||align="center"|60||align="center"|400||align="center"|2100|-| IO_L19P_T3_35||FDDR_ADDR||FDDR_ADDR_0||align="center"|1836,73||align="center"|80||align="center"|1912||align="center"|40||align="center"|100||align="center"|50||align="center"|60||align="center"|400||align="center"|2100|-|} ===== FDDR_CK class =====Following table details routing rules implemented on Bora SoM and suggested carrier board guidelines for FDDR_CK class signals. The picture shows connection scheme and the nomenclature used in presence of the table. [[File:FDDR_CK.png]] {| class="wikitable" border="1"! align="center" style="background:#f0f0f0;" rowspan="2" |'''Bora pin name'''! align="center" style="background:#f0f0f0;" rowspan="2" |'''Group name'''! align="center" style="background:#f0f0f0;" rowspan="2" |'''Carrier board net name'''! align="center" style="background:#f0f0f0;" colspan="4" |'''SoM Lite adapter does not make sense to provide the routing rules and specifications'''! align="center" style="background:#f0f0f0;" colspan="8" |'''Carrier board guidelines'''|-! align="center" style="background:#f0f0f0;"|'''Actual length<br>[mils]'''! align="center" style="background:#f0f0f0;"|'''Intra-pair match<br>[mils]'''! align="center" style="background:#f0f0f0;"|'''Max length match (with respect information. Please refer to FDDR_ADDR group)<br>[mils]'''! align="center" style="background:#f0f0f0;"|'''Nominal max length<br>[mils]'''! align="center" style="background:#f0f0f0;"|'''Intra-pair match<br>[mils]'''! align="center" style="background:#f0f0f0;"|'''CK_A2 pair match (with respect to FDDR_ADDR)<br>the [mils]'''! align="center" style="background:#f0f0f0;"|'''CK_AT intra-pair match<br>[mils]'''! align="center" style="background:#f0f0f0;"|'''CK_AS1 match Programmable_logic_(with respect to FDDR_ADDRBoraLite)<br>[mils]'''! align="center" style="background:#f0f0f0;"|'''CK_AS1 max length<br>[mils]'''! align="center" style="background:#f0f0f0;"|'''CK_AT maximum length<br>[mils]'''! align="center" style="background:#f0f0f0;"|'''CK_AT pair match Programmable_logic_(with respect to FDDR_ADDRBoraLite)<br>[milspage]'''! align="center" style="background:#f0f0f0;"|'''CK_A2+CK_AS1 max length<br>[mils]'''|- style="background: gray"| IO_L21P_T3_DQS_AD14P_35||FDDR_CK||FDDR_CK_P0||align="center"|1900,39||align="center"|5||align="center"|80||align="center"|1912||align="center"|10||align="center"|40||align="center"|5||align="center"|50||align="center"|60||align="center"|400||align="center"|100||align="center"|2100|- style="background: gray"| IO_L21N_T3_DQS_AD14N_35||FDDR_CK||FDDR_CK_N0||align="center"|1898,17||align="center"|5||align="center"|80||align="center"|1912||align="center"|10||align="center"|40||align="center"|5||align="center"|50||align="center"|60||align="center"|400||align="center"|100||align="center"|2100|-|} ===== FDDR_BYTE0 class =====Following table details routing rules implemented about information on Bora SoM and suggested carrier board guidelines for FDDR_BYTE0 class signals. {| class="wikitable" border="1"! align="center" style="background:#f0f0f0;" rowspan="2" |'''Pin Name'''! align="center" style="background:#f0f0f0;" rowspan="2" |'''Group name'''! align="center" style="background:#f0f0f0;" rowspan="2" |'''Carrier board net name'''! align="center" style="background:#f0f0f0;" colspan="4" |'''SoM internal BORA Lite routing rules and specifications'''! align="center" style="background:#f0f0f0;" colspan="3" |'''Carrier board guidelines'''|-! align="center" style="background:#f0f0f0;"|'''Actual length<br>[mils]'''! align="center" style="background:#f0f0f0;"|'''Max length match<br>[mils]'''! align="center" style="background:#f0f0f0;"|'''Max inter-pair match length on SOM<br>[mils]'''! align="center" style="background:#f0f0f0;"|'''Nominal max length<br>[mils]'''! align="center" style="background:#f0f0f0;"|'''Group match (mandatory)<br>[mils]'''! align="center" style="background:#f0f0f0;"|'''Intra-pair match (mandatory)<br>[mils]'''! align="center" style="background:#f0f0f0;"|'''Max length<br>[mils]'''|-| IO_L2N_T0_AD8N_35||FDDR_BYTE0||FDDR_DQ_2||align="center"|1222,66||align="center"|15||align="center"|-||align="center"|1230||align="center"|25||align="center"|-||align="center"|CK_A2+CK_AS1(max)|-| IO_L6P_T0_35||FDDR_BYTE0||FDDR_DQ_7||align="center"|1219,68||align="center"|15||align="center"|-||align="center"|1230||align="center"|25||align="center"|-||align="center"|CK_A2+CK_AS1(max)|-| IO_L5P_T0_AD9P_35||FDDR_BYTE0||FDDR_DQ_5||align="center"|1226,42||align="center"|15||align="center"|-||align="center"|1230||align="center"|25||align="center"|-||align="center"|CK_A2+CK_AS1(max)|-| IO_L4P_T0_35||FDDR_BYTE0||FDDR_DQ_3||align="center"|1219,68||align="center"|15||align="center"|-||align="center"|1230||align="center"|25||align="center"|-||align="center"|CK_A2+CK_AS1(max)|-| IO_L2P_T0_AD8P_35||FDDR_BYTE0||FDDR_DQ_1||align="center"|1219,68||align="center"|15||align="center"|-||align="center"|1230||align="center"|25||align="center"|-||align="center"|CK_A2+CK_AS1(max)|-| IO_L1N_T0_AD0N_35||FDDR_BYTE0||FDDR_DQ_0||align="center"|1219,68||align="center"|15||align="center"|-||align="center"|1230||align="center"|25||align="center"|-||align="center"|CK_A2+CK_AS1(max)|-| IO_L4N_T0_35||FDDR_BYTE0||FDDR_DQ_4||align="center"|1219,68||align="center"|15||align="center"|-||align="center"|1230||align="center"|25||align="center"|-||align="center"|CK_A2+CK_AS1(max)|-| IO_L5N_T0_AD9N_35||FDDR_BYTE0||FDDR_DQ_6||align="center"|1219,68||align="center"|15||align="center"|-||align="center"|1230||align="center"|25||align="center"|-||align="center"|CK_A2+CK_AS1(max)|-| IO_L1P_T0_AD0P_35||FDDR_BYTE0||FDDR_DM_0||align="center"|1219,68||align="center"|15||align="center"|-||align="center"|1230||align="center"|25||align="center"|-||align="center"|CK_A2+CK_AS1(max)|- style="background: gray"| IO_L3P_T0_DQS_AD1P_35||FDDR_BYTE0||FDDR_DQS_P0||align="center"|1221,04||align="center"|15||align="center"|5||align="center"|1230||align="center"|25||align="center"|5||align="center"|CK_A2+CK_AS1(max)|- style="background: gray"| IO_L3N_T0_DQS_AD1N_35||FDDR_BYTE0||FDDR_DQS_N0||align="center"|1219,42||align="center"|15||align="center"|5||align="center"|1230||align="center"|25||align="center"|5||align="center"|CK_A2+CK_AS1(max)|-|} ===== FDDR_BYTE1 class =====Following table details routing rules implemented on Bora SoM and suggested carrier board guidelines for FDDR_BYTE1 class signals. {| class="wikitable" border="1"! align="center" style="background:#f0f0f0;" rowspan="2" |'''Pin Name'''! align="center" style="background:#f0f0f0;" rowspan="2" |'''Group name'''! align="center" style="background:#f0f0f0;" rowspan="2" |'''Carrier board net name'''! align="center" style="background:#f0f0f0;" colspan="4" |'''SoM routing rules and specifications'''! align="center" style="background:#f0f0f0;" colspan="3" |'''Please take carefully into account the design of the Carrier board guidelines'''|-! align="center" style="background:#f0f0f0;"|'''Actual length<br>[mils]'''! align="center" style="background:#f0f0f0;"|'''Max length match<br>[mils]'''! align="center" style="background:#f0f0f0;"|'''Max inter-pair match length on SOM<br>[mils]'''! align="center" style="background:#f0f0f0;"|'''Nominal max length<br>[mils]'''! align="center" style="background:#f0f0f0;"|'''Group match (mandatory)<br>[mils]'''! align="center" style="background:#f0f0f0;"|'''Intra-pair match (mandatory)<br>[mils]'''! align="center" style="background:#f0f0f0;"|'''Max length<br>[mils]'''|-| IO_L10N_T1_AD11N_35||FDDR_BYTE1||FDDR_DQ_12||align="center"|1345,93||align="center"|15||align="center"|-||align="center"|1355||align="center"|20||align="center"|-||align="center"|CK_A2+CK_AS1(max)|-| IO_L10P_T1_AD11P_35||FDDR_BYTE1||FDDR_DQ_11||align="center"|1345,93||align="center"|15||align="center"|-||align="center"|1355||align="center"|20||align="center"|-||align="center"|CK_A2+CK_AS1(max)|-| IO_L11P_T1_SRCC_35||FDDR_BYTE1||FDDR_DQ_13||align="center"|1353,43||align="center"|15||align="center"|-||align="center"|1355||align="center"|20||align="center"|-||align="center"|CK_A2+CK_AS1(max)|-| IO_L12P_T1_MRCC_35||FDDR_BYTE1||FDDR_DQ_15||align="center"|1341,3||align="center"|15||align="center"|-||align="center"|1355||align="center"|20||align="center"|-||align="center"|CK_A2+CK_AS1(max)|-| IO_L11N_T1_SRCC_35||FDDR_BYTE1||FDDR_DQ_14||align="center"|1340||align="center"|15||align="center"|-||align="center"|1355||align="center"|20||align="center"|-||align="center"|CK_A2+CK_AS1(max)|-| IO_L8P_T1_AD10P_35||FDDR_BYTE1||FDDR_DQ_9||align="center"|1340||align="center"|15||align="center"|-||align="center"|1355||align="center"|20||align="center"|-||align="center"|CK_A2+CK_AS1(max)|-| IO_L7N_T1_AD2N_35||FDDR_BYTE1||FDDR_DQ_8||align="center"|1340||align="center"|15||align="center"|-||align="center"|1355||align="center"|20||align="center"|-||align="center"|CK_A2+CK_AS1(max)|-| IO_L8N_T1_AD10N_35||FDDR_BYTE1||FDDR_DQ_10||align="center"|1340||align="center"|15||align="center"|-||align="center"|1355||align="center"|20||align="center"|-||align="center"|CK_A2+CK_AS1(max)|-| IO_L7P_T1_AD2P_35||FDDR_BYTE1||FDDR_DM_1||align="center"|1345,93||align="center"|15||align="center"|-||align="center"|1355||align="center"|20||align="center"|-||align="center"|CK_A2+CK_AS1(max)|- style="background: gray"| IO_L9P_T1_DQS_AD3P_35||FDDR_BYTE1||FDDR_DQS_P1||align="center"|1354,26||align="center"|15||align="center"|5||align="center"|1355||align="center"|20||align="center"|5||align="center"|CK_A2+CK_AS1(max)|- style="background: gray"| IO_L9N_T1_DQS_AD3N_35||FDDR_BYTE1||FDDR_DQS_N1||align="center"|1350,66||align="center"|15||align="center"|5||align="center"|1355||align="center"|20||align="center"|5||align="center"|CK_A2+CK_AS1(max)|-|} ===== VREF =====Recommendations:* use a "T" connection as shown by following picture* use 20+ mils trace* place bypass capacitors as close as possible considering every information related to power balls. [[File:VREF.png]] ===== Related Xilinx documentation =====* [http://www.xilinx.com/support/documentation/ip_documentation/mig_7series/v2_0/ug586_7Series_MIS.pdf Xilinx Memory Interface Solutions UG586]* [http://www.xilinx.com/support/documentation/ip_documentation/mig_7series/v2_0/ds176_7Series_MIS.pdf Xilinx Memory Interface Solutions Data Sheet] === PL bank 13 (XC7Z020 only) ===Routing implemented on Bora SoM allows the use of bank 13's signals as differential pairs as well as singleSO-ended lines. Signals are grouped as denoted by DIMM socket and the following table that details routing rules tracenet on Bora module. No carrier board guidelines can be provided, because these are application-dependent. Pairs are highlighted with different colors. When used as differential pairs, differential impedence is 100 Ohm. When used as single-ended signals, impedence is 50 Ohm. {| class="wikitable" border="1"| align="center" style="background:#f0f0f0;"|'''Bora pin name'''| align="center" style="background:#f0f0f0;"|'''Individual net length<br>[mils]'''| align="center" style="background:#f0f0f0;"|'''Intra-pair match<br>[mils]'''| align="center" style="background:#f0f0f0;"|'''Inter-pair match<br>[mils]'''| align="center" style="background:#f0f0f0;"|'''Group Name'''|-| IO_L15N_T2_DQS_13||align="center"|1582,37||align="center"|25||align="center"|200||BANK13 Diff group 1|-| IO_L15P_T2_DQS_13||align="center"|1602,37||align="center"|25||align="center"|200||BANK13 Diff group 1|- style="background: gray"| IO_L16N_T2_13||align="center"|1589,32||align="center"|25||align="center"|200||BANK13 Diff group 1|- style="background: gray"| IO_L16P_T2_13||align="center"|1602,33||align="center"|25||align="center"|200||BANK13 Diff group 1|-| IO_L17N_T2_13||align="center"|1710,41||align="center"|25||align="center"|200||BANK13 Diff group 1|-| IO_L17P_T2_13||align="center"|1722,73||align="center"|25||align="center"|200||BANK13 Diff group 1|- style="background: gray"| IO_L18N_T2_13||align="center"|1720,53||align="center"|25||align="center"|200||BANK13 Diff group 1|- style="background: gray"| IO_L18P_T2_13||align="center"|1712,11||align="center"|25||align="center"|200||BANK13 Diff group 1|-| IO_L19N_T3_VREF_13||align="center"|1585,55||align="center"|25||align="center"|200||BANK13 Diff group 1|-| IO_L19P_T3_13||align="center"|1602,96||align="center"|25||align="center"|200||BANK13 Diff group 1|- style="background: gray"| IO_L20N_T3_13||align="center"|1623,95||align="center"|25||align="center"|200||BANK13 Diff group 1|- style="background: gray"| IO_L20P_T3_13||align="center"|1626,27||align="center"|25||align="center"|200||BANK13 Diff group 1|-| IO_L21N_T3_DQS_13||align="center"|1661,55||align="center"|25||align="center"|200||BANK13 Diff group 1|-| IO_L21P_T3_DQS_13||align="center"|1668,95||align="center"|25||align="center"|200||BANK13 Diff group 1|- style="background: gray"| IO_L22N_T3_13||align="center"|1592,18||align="center"|25||align="center"|200||BANK13 Diff group 1|- style="background: gray"| IO_L22P_T3_13||align="center"|1577,63||align="center"|25||align="center"|200||BANK13 Diff group 1|-style="background: black"| ''' '''|||||||||-| IO_L11N_T1_SRCC_13||align="center"|1702,04||align="center"|10||align="center"|50||BANK13 xRCC group|-| IO_L11P_T1_SRCC_13||align="center"|1705,07||align="center"|10||align="center"|50||BANK13 xRCC group|- style="background: gray"| IO_L12N_T1_MRCC_13||align="center"|1704,42||align="center"|10||align="center"|50||BANK13 xRCC group|- style="background: gray"| IO_L12P_T1_MRCC_13||align="center"|1703,11||align="center"|10||align="center"|50||BANK13 xRCC group|-| IO_L13N_T2_MRCC_13||align="center"|1731,33||align="center"|10||align="center"|50||BANK13 xRCC group|-| IO_L13P_T2_MRCC_13||align="center"|1732,15||align="center"|10||align="center"|50||BANK13 xRCC group|- style="background: gray"| IO_L14N_T2_SRCC_13||align="center"|1710,12||align="center"|10||align="center"|50||BANK13 xRCC group|- style="background: gray"| IO_L14P_T2_SRCC_13||align="center"|1716,36||align="center"|10||align="center"|50||BANK13 xRCC group|-|}the Carrier
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