AXEL Lite SOM/AXEL Lite Hardware/General Information/Processor and memory subsystem

From DAVE Developer's Wiki
Jump to: navigation, search
History
Version Issue Date Notes
1.0.0 Sep 2020 New layout documentation


Processor and memory subsystem[edit | edit source]

The heart of AXEL Lite module is composed by the following components:

  • i.MX6 SoC application processor
  • Power supply unit
  • DDR memory banks
  • NOR and NAND flash banks
  • SO-DIM 204 pin connector with interfaces signals

This chapter shortly describes the main Axel Lite components.

Processor Info[edit | edit source]

Processor # Cores Clock L2 Cache DDR3 Graphics Acceleration IPU VPU SATA-II
i.MX6 Solo 1 800 MHz
1 GHz
512 KB 32 bit @ 400 MHz 3D: Vivante GC880
2D: Vivante GC320
Vector: N.A.
1x 1x No
i.MX6 DualLite 2 850 MHz
1 GHz
512 KB 64 bit @ 533 MHz 3D: Vivante GC880
2D: Vivante GC320
1x 1x No
i.MX6 Dual 2 850 MHz
1 GHz
1.2 GHz
1 MB 64 bit @ 533 MHz 3D: Vivante GC2000
2D: Vivante GC320
Vector: Vivante GC335
2x 2x Yes
i.MX6 Quad 4 850 MHz
1 GHz
1.2 GHz
1 MB 64 bit @ 533 MHz 3D: Vivante GC2000
2D: Vivante GC320
Vector: Vivante GC335
2x 2x Yes
Table: i.MX6 models comparison

RAM memory bank[edit | edit source]

DDR3 SDRAM memory bank is composed by 4x 16-bit width chips resulting in a 64-bit combined width bank. The following table reports the SDRAM specifications:

CPU connection Multi-mode DDR controller (MMDC)
Size min 512 MB
Size max 4 GB
Width 64 bit
Speed 533 MHz

NOR flash bank[edit | edit source]

NOR flash is a Serial Peripheral Interface (SPI) device. This device is connected to the eCSPI channel 1 and by default it acts as boot memory. The following table reports the NOR flash specifications:

CPU connection eCSPI channel 1
Size min 8 MB
Size max 64 MB
Chip select ECSPI1_SS0
Bootable Yes

NAND flash bank[edit | edit source]

On board main storage memory is a 8-bit wide NAND flash connected to the CPU's Raw NAND flash controller. Optionally, it can act as boot peripheral. The following table reports the NAND flash specifications:

CPU connection Raw NAND flash controller
Page size 512 byte, 2 kbyte or 4 kbyte
Size min 128 MB
Size max 2 GB
Width 8 bit
Chip select NANDF_CS0
Bootable Yes

Memory map[edit | edit source]

For detailed information, please refer to chapter 2 “Memory Maps” of the i.MX Applications Processor Reference Manual.

Power supply unit[edit | edit source]

AXEL Lite embeds all the elements required for powering the unit, therefore power sequencing is self-contained and simplified. Nevertheless, power must be provided from carrier board, and therefore users should be aware of the ranges power supply can assume as well as all other parameters.