MITO 8M SOM/MITO 8M Hardware/General Information/Processor and memory subsystem

History
Version	Issue Date	Notes
1.0.0	Sep 2020	First release

TBD: nella pagina vanno documentate le varie sezioni e documentate ad hoc a seconda del SoC (ad esempio per Bora va aggiunta la sezione PL)

Processor and memory subsystem

The heart of MITO 8M module is composed by the following components:

• i.MX8M SoC application processor
• Power supply unit
• LPDDR4 memory bank
• eMMC or NAND flash banks
• Connectors:
  • 1 x 204 pins SO-DIMM edge connector with interfaces signals
    • partially compatible with AXEL Lite SOM
  • 2 x 25 pins One Piece mating board layout Expansion

This chapter shortly describes the main MITO 8M components.

Processor Info

Table: i.MX8M models comparison

Processor	# Cores	Clock	L2 Cache	LPDDR4	GPU	VPU	Display Controller	Video Output	Camera Input	PCIe	USB
i.MX8M Dual	2x Arm® Cortex®-A53 1x Arm® Cortex®-M4	1.3 GHz 1.5 GHz	1 MB	32 bit @ 1600 MHz (LPDDR4-3200)	4 Shader OpenGL ES 1.1, 2.0, 3.0, 3.1 Open CL 1.2 Vulkan	4Kp60 HEVC/H.265 main, and main 10 decoder 4Kp60 VP9 decoder 4Kp30 AVC/H.264 decoder 1080p60 MPEG-2, MPEG-4p2, VC-1, VP8, RV9, AVS, MJPEG, H.263 decoder	Dual Independent Display Support up tp 4kp60	1x HDMI 2.0a 1x MIPI-DSI (with MIPI to LVDS bridge)	2x MIPI CSI (4-lanes each)	2x PCIe 2.0 (1-lane each)	2x USB 3.0 Dual role
i.MX8M Quad	4x Arm® Cortex®-A53 1x Arm® Cortex®-M4

RAM memory bank

LPDD4 SDRAM memory bank is composed by 1x 32-bit width chip. The following table reports the SDRAM specifications:

CPU connection	Multi-mode DDR controller (MMDC)
Size max	4 GB
Width	32 bit
Speed	1600 MHz

eMMC flash bank

On board main storage memory eMMC is connected to the SDIO1 interface and it can act as boot peripheral. The following table reports the eMMC flash specifications:

CPU connection	SDIO1
Size min	4 GB
Size max	64 GB
Bootable	Yes

NAND flash bank

Alternative option for main storage memory can be a 8-bit wide NAND flash connected to the CPU's Raw NAND flash controller. It can act as boot peripheral. The following table reports the NAND flash specifications:

CPU connection	Raw NAND flash controller
Page size	TBD
Size min	TBD
Size max	TBD
Width	8 bit
Chip select	TBD
Bootable	Yes

Memory map

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

Power supply unit

MITO 8M 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.

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