ONDA SOM/ONDA Hardware/Peripherals/I2C
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Contents
Peripheral I2C[edit | edit source]
This I²C module is a bus controller that can function as a master or a slave in a multi-master design. It supports an extremely wide clock frequency range up to 400 Kb/s.
An internal voltage level translator allows the use of MIO Bank 501 signals with a different voltage level than the internal 3V3-powered devices: the I²C0 is internally connected to the following devices:
- Temperature_Monitor: Texas Instruments TMP421 (Address: 0x4F)
- Real Time Clock: Maxim Integrated DS3232M (Address: 0x68)
The following table describes the interface signals:
| Pin name | Conn. pin | Function | Notes |
|---|---|---|---|
| PS_MIO39_501 | J1.84 | I2C SDA | voltage level referred to Bank 501 power supply |
| PS_MIO38_501 | J1.88 | I2C SCL | voltage level referred to Bank 501 power supply |
