I2C/SMI Address Assignments
I2C Address
| Part | Address | Accessible by | Note |
|---|---|---|---|
| U4 PSE controller | 010 0001 (0x21)011 0001 (0x31) | AP3800 | 0x21: MSCC External Automode (default)0x31: Semi/ Auto mode |
| U10 IDPROM | 101 0000 (0x50) | AP3800 | |
| U11 | 111 0000 (0x70) | AP3800 | Reserved for internal-Cisco use, not included on the HDK :exclamation: |
| U13 Ambient Light Sensor | 100 0100 (0x44) | AP3800/Module | |
| U14 Temperature/Humidity Sensor | 100 0000 (0x40) | AP3800/Module | |
| J7 External sensor header | - | AP3800/Module | - |
Ethernet MDC/MDIO Address
| Part | Address | Accessible by | Note |
|---|---|---|---|
| U1 Ethernet switch | 00010 | AP3800/Module | AP3800 need to sync ETH switch and PHY of EM |