27.5.2 Dual Mode Control Configuration
| Name: | DUALCTRL |
| Offset: | 0x01 |
| Reset: | 0x00 |
| Property: | - |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| INPUTLVL | SDAHOLD[1:0] | FMPEN | ENABLE | ||||||
| Access | R/W | R/W | R/W | R/W | R/W | ||||
| Reset | 0 | 0 | 0 | 0 | 0 | ||||
Bit 6 – INPUTLVL Input Voltage Transition Level
| Value | Name | Description |
|---|---|---|
| 0 | I2C | I2C input voltage transition level |
| 1 | SMBUS | SMBus 3.0 input voltage transition level |
Bits 3:2 – SDAHOLD[1:0] SDA Hold Time
This bit field selects the SDA hold time for the TWI client. See also the Electrical Characteristics section. This bit field is ignored if the Dual mode is not enabled.
| Value | Name | Description |
|---|---|---|
| 0x0 | OFF | Hold time OFF |
| 0x1 | 50NS | Short hold time |
| 0x2 | 300NS | Meets the SMBus 2.0 specifications under typical conditions |
| 0x3 | 500NS | Meets the SMBus 2.0 across all corners |
Bit 1 – FMPEN FM Plus Enable
Writing a ‘1’ to this bit selects the 1 MHz bus speed for the
TWI client. This bit is ignored if the Dual mode is not enabled.
| Value | Name | Description |
|---|---|---|
| 0 | OFF | Operating in Standard mode or Fast mode |
| 1 | ON | Operating in Fast mode Plus |
Bit 0 – ENABLE Dual Control Enable
Writing a ‘1’ to this bit will enable the Dual mode
configuration.