AOM-DB3500 SPI CN1&SPI SN2&CN2 I2C——I2C/SPI
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Revision as of 08:09, 9 December 2025 by Xingxing.li (talk | contribs)
I2C Pin Header
AOM-3821 has two I2C-PIN-Header channels. Using EG70 Test Board to read I2C flash. Using I2C0 as an example:
| I2C-PIN-Header | |||
| I2C Number | Bus Number | I2C Address | AOM-DB3500 Number |
| I2C0 | 5 | 0x51 | CN2 |
| I2C1 | 3 | 0x51 | CN4 |
CN2_I2C
| CN2 CN2 Connector Pin Definition | |||
| Pin | Signal | I/O | Description |
| 1 | GND | Ground | |
| 2 | I2C0_DATA | I/O | I2C0 Data |
| 3 | I2C0_CLK | I | I2C0 clock input from host. |
| 4 | +V1.8 | 1.8V Source | |
# i2cdetect -y 5 # i2ctransfer -y 5 w4@0x51 0x1f 0xf0 0x22 0x33 # i2ctransfer -y 5 w2@0x51 0x1f 0xf0 r2 0x22 0x33
CN4_I2C
| CN4 CN4 Connector Pin Definition | |||
| Pin | Signal | I/O | Description |
| 1 | GND | Ground | |
| 2 | I2C1_DATA | I/O | I2C1 Data |
| 3 | I2C1_CLK | I | I2C0 clock input from host. |
| 4 | +V1.8 | 1.8V Source | |
# i2cdetect -y 3 # i2ctransfer -y 3 w4@0x51 0x1f 0xf0 0x22 0x33 # i2ctransfer -y 3 w2@0x51 0x1f 0xf0 r2 0x22 0x33
SPI PIN Header
AOM-3821 has two SPI-PIN-Header channels. SPIs on AOM-DB3500 have multi�functions, change to SPI PIN Header.
SPI_CN1