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
i.MX8M Dual	2 x Arm® Cortex®-A53 1 x 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	1 x HDMI 2.0a 1 x MIPI-DSI (with MIPI to LVDS bridge)	2 x MIPI CSI (4-lanes each)	2 x PCIe 2.0 (1-lane each)
i.MX8M Quad	4 x Arm® Cortex®-A53 1 x Arm® Cortex®-M4

RAM memory bank

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

NOR flash is a Serial Peripheral Interface (SPI) device. This device is connected to the eCSPI channel 5 and by default it acts as boot memory. The following table reports the NOR flash specifications:

CPU connection	eCSPI channel 5
Size min	8 MB
Size max	64 MB
Chip select	ECSPI5_SS0
Bootable	Yes

NAND flash bank

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

eMMC flash bank

CPU connection	SDIO
Page size	xxxxxx
Size min	xxx MB
Size max	xxx GB
Width	xx bit
SDHC
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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