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Copyright (c) 2022 Innodisk crop.

This software is released under the MIT License.
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# TOC
- [TOC](#toc)
- [SOM Board Overview](#som-board-overview)
- [Devices on SOM](#devices-on-som)
- [QSPI Flash](#qspi-flash)
- [eMMC](#emmc)
- [DDR4](#ddr4)
- [TPM2.0 Security Module](#tpm20-security-module)
- [SOC](#soc)
- [Carrier Board Overview](#carrier-board-overview)
- [IO on Carrier Board](#io-on-carrier-board)
- [Processing System (PS)](#processing-system-ps)
- [Programmable Logic (PL)](#programmable-logic-pl)
- [Switchs on Carrier Board](#switchs-on-carrier-board)
- [SW3](#sw3)
- [SW5](#sw5)
- [SW5-1](#sw5-1)
- [SW5-2](#sw5-2)
- [SW5-3](#sw5-3)
- [SW5-4](#sw5-4)
- [SW7](#sw7)
- [SW8](#sw8)
- [SW10(LED)](#sw10led)
- [Jumpers on Carrier Board](#jumpers-on-carrier-board)
- [Fan power](#fan-power)
- [CN6](#cn6)
- [Debug board](#debug-board)
- [Debug UART](#debug-uart)
- [JTAG](#jtag)
- [HDMI UART](#hdmi-uart)

# SOM Board Overview

# Devices on SOM
## QSPI Flash
- Size : 512MB
Storage for boot firmware which file name is `BOOT.BIN`.

## eMMC
- Size : 16GB
Storage for Images, there should be two partition `boot` and `root` in eMMC.

## DDR4
- Size : 4GB
- Speed : DDR4_2400R

## TPM2.0 Security Module
- Vendor :　infineon

## SOC
- Part Name : xck26-sfvc784-2lv-c
- Zynq UltraScale+
This series FPGA are also called as `zynqmp`. It contain two main part:
- Processing System (PS)
- CPU CortexA53 * 4
- GPU Mali400
- IO (MIO)
- Programmable Logic (PL)
- Video codec (VCU)
- Logic gates
- IO (EMIO)

# Carrier Board Overview
- Following shows the overview of A4 version of carrier board, double check the IO or switch location if not the same version, `there might have some rotation or shifting`.


# IO on Carrier Board
There are two types of IO PS & PL on carrier board, IO which from PS will be always avalible, but IO which from PL will be only avalible when FPGA with firmware include this IO.
## Processing System (PS)
- LAN
- USB
- HDMI
- SD Card
- eMMC
- UART0
- M.2 EKEY PCIE Gen2x1
## Programmable Logic (PL)
- M.2 MKEY PCIE Gen3x4
- CAN0
- CAN1
- GPIO
- I2C

# Switchs on Carrier Board
This section introduce the function of switchs which on [the baord](#carrier-board-overview).
## SW3
- Function : Hardware reset.


## SW5
### SW5-1
- Function : HDB IO voltage Level switch, default off to 1.8V, switch on to 3.3V.
- HDB including GPIO0, GPIO1, GPIO2
- Suggest using 1.8V.

### SW5-2
- Function : HDC IO voltage Level switch, default off to 1.8V, switch on to 3.3V.
- HDC including GPIO3, GPIO4
- Suggest using 1.8V.

### SW5-3
- Function : Power button on switch, default off for auto power on.

### SW5-4
- Function : I2C voltage Level switch for different IO bank, default off to 1.8V, switch on to 3.3V.
- Suggest using 1.8V.


## SW7
- Function : CAN BUS Terminal resistor(120ohm) switch. SW7[1] for CAN0, SW7[2] for CAN1, default off.


## SW8
- Function : Boot Mode selector, default Boot Mode is Quad-SPI (32b).
Boot Mode | SW8 [1:4]
---|---
PS JTAG | 1111
Quad-SPI (32b) | 1011
- For example following image shows the Boot Mode is Quad-SPI (32b).


## SW10(LED)
- Function : Power button, Power button on when SW5-3 switch to ON.


# Jumpers on Carrier Board
This section introduce the function of jumpers which on [the baord](#carrier-board-overview).
## Fan power
- Function : From left to right of following image are 12V & PWM.


## CN6
CN6 is for innoagent connection.
PIN9 | PIN7 | PIN5 | PIN3 | PIN1
---|---|---|---|---
NC | GND | GND | GND | GND |
UARTRX | UARTTX | RST | PWR | +5V


# Debug board

Debug Board include three main function:
- Debug UART
- JTAG
- HDMI UART

## Debug UART
- Baud rate : 115200
- Function : Main interactive interface for developer, it could be access by serial port utilities like minicom, putty, mobaxterm.

## JTAG
JTAG won't work if EEPROM on debug board didn't contain correct info.
- Function : JTAG for xilinx IDE.

## HDMI UART
Direct connect into HDMI splitter which on carrier board.
- Baud rate : 115200
- Function : Flash firmware for HDMI splitter.