maple register: EXTRA_GPIO_CTRL
Details
- Name
- EXTRA_GPIO_CTRL
- Offset
- a0e0
- Feature
- LED
Description
Auxiliary MDIO and extra GPIO device control register.
See also DMY_REG5 for extra control bits on register shadowing.
Fields
| Name | LSB | Bits | Description |
|---|---|---|---|
| RESERVED | 10 | 22 |
|
| MDC_PERIOD | 8 | 2 |
Auxiliary MDIO clock frequency:
|
| SYNC_GPIO | 7 | 1 |
|
| EXTRA_GPIO_READY | 6 | 1 |
|
| EXTRA_GPIO_ADDR | 1 | 5 |
RTL8231 GPIO chip address, for register shadowing. |
| EXTRA_GPIO_EN | 0 | 1 |
Enable device auxiliary (MDIO) bus for RTL8231 access. Must be set in order to send commands, and allow register shadowing. If this bit is set GPIO A2 will be muxed as MDC, and A3 as MDIO. When cleared, A2 and A3 can be used as GPIO pins. |