Difference between revisions of "RIALTO SBC/Interfaces and Connectors/Mezzanine"

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| style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000" |2024/01/13
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| style="border-left:solid 2px #73B2C7; border-right:solid 2px #73B2C7;border-top:solid 2px #73B2C7; border-bottom:solid 2px #73B2C7; background-color:#edf8fb; padding:5px; color:#000000" |First documentationrelease
 
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The following table describes the interface signals:
 
The following table describes the interface signals:
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* J60
 
 
{| class="wikitable"
 
{| class="wikitable"
 
! latexfontsize="scriptsize" |Pin#
 
! latexfontsize="scriptsize" |Pin#
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|UART5_TX_DATA
 
|UART5_TX_DATA
 
|I2C2_SCL
 
|I2C2_SCL
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|GPIO1_IO30
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|GPIO1_IO3
 
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|GPIO3_IO28 or GPIO4_IO27
 
|GPIO3_IO28 or GPIO4_IO27
 
|LCD_DATA23 or CSI_DATA06 mounting options
 
|LCD_DATA23 or CSI_DATA06 mounting options
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|10
 
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|DGND
 
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|Ground
 
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* J61
 
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{| class="wikitable"
 
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! latexfontsize="scriptsize" |Pin#
 
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! latexfontsize="scriptsize" |Pin name
 
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! latexfontsize="scriptsize" |Alternate function
 
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! latexfontsize="scriptsize" |GPIO
 
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!Pin notes
 
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|1
 
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|VIN
 
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|2
 
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|PMIC_5V
 
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|3
 
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|3V3_AUX
 
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|4
 
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|VDD_ADC
 
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|5
 
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|GPIO1_IO01
 
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|WDOG1_WDOG_B
 
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|GPIO1_IO01
 
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|6
 
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|GPIO1_IO02
 
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|I2C1_SCL
 
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|GPIO1_IO02
 
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|7
 
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|GPIO1_IO03
 
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|I2C1_SDA
 
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|GPIO1_IO03
 
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|8
 
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|GPIO1_IO04
 
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|UART5_TX, PWM3
 
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|GPIO1_IO04
 
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|9
 
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|GPIO1_IO05
 
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|UART5_RX, PWM4
 
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|GPIO1_IO05
 
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|10
 
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UART peripherals use standard Linux protocols.
 
UART peripherals use standard Linux protocols.
  
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==== I2C ====
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==== GPIO ====
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I2C buses can be used with i2ctools (at userspace) or accessing the related <code>/dev/i2c-''x''</code> device in Linux.
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Under Linux the GPIOs can be manipulated su <code>sysfs</code> export or with the gpio tools.
  
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==== SPI ====
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<section end="Body" />
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SPI peripherals use standard <code>spidev</code> kernel interface.
 
  
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==== PWM ====
 
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The PWM driver is accessed via <code>sysfs</code> in user space
 
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==== GPIO ====
 
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Under Linux the GPIOs can be manipulated su <code>sysfs</code> export or with the <code>gpiod</code> tools in Linux.<section end="Body" />
 
 
[[Category:RIALTO SBC]]
 
[[Category:RIALTO SBC]]

Revision as of 14:12, 13 January 2024

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History
Issue Date Notes
2024/01/13 First documentationrelease



Mezzanine Connectors[edit | edit source]

Description[edit | edit source]

RIALTO SBC has two mezzanine expansion connectors: J60 and J61.

J60 is a 10x1x2.54mm pin strip header connector.


UART, I2C, GPIO connector (J60)

J61 is a 10x1x2.54mm pin strip header connector.


VIN, 3V3, 5V, GPIO connector (J61)

Signals[edit | edit source]

The following table describes the interface signals:

Pin# Pin name Alternate function GPIO Pin notes
1 UART2_RX_DATA I2C4_SDA, ECSPI3_SCLK GPIO1_IO21
2 UART2_RTS FLEXCAN2_RX, ECSPI3_MISO GPIO1_IO23
3 UART2_TX_DATA I2C4_SCL, ECSPI3_SS0 GPIO1_IO20
4 UART2_CTS FLEXCAN2_TX, ECSPI3_MOSI GPIO1_IO22
5 UART5_TX_DATA I2C2_SCL GPIO1_IO3
6 UART5_RX_DATA I2C2_SDA GPIO1_IO31
7 MEZZANINE_GP0 GPIO3_IO24 or GPIO4_IO25 LCD_DATA19 or CSI_DATA04 mounting options
8 MEZZANINE_GP1 GPIO3_IO27 or GPIO4_IO26 LCD_DATA22 or CSI_DATA05 mounting options
9 MEZZANINE_GP2 GPIO3_IO28 or GPIO4_IO27 LCD_DATA23 or CSI_DATA06 mounting options
10 DGND Ground

All the GPIO signals are 0-3.3V level.

Device mapping[edit | edit source]

UART[edit | edit source]

  • UART2 and it is mapped to /dev/ttymxc1 device in Linux
  • UART5 and it is mapped to /dev/ttymxc4 device in Linux

GPIO[edit | edit source]

GPIOs are mapped into banks each of which contains 32 pins. They are named as GPIO<bank>_IO<pin>

Each pin can be addressed with an incremental number, calculated as follows: GPIO = 32 x (<bank> - 1) + <pin>

Device usage[edit | edit source]

UART[edit | edit source]

UART peripherals use standard Linux protocols.

GPIO[edit | edit source]

Under Linux the GPIOs can be manipulated su sysfs export or with the gpio tools.


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