19.14.9 RxyFEAT
Note:
- The SLEW bits control the slew rate of the standard GPIO driver when driven by the I2C module only.
- If the user configures the SYSBUF bits to select one of the I3C buffers (FST or LV), then the user must also configure the I3CBUF bits to select the same I3C buffer for reliable and predicable operation. However, if the user selects a non-I3C buffer using the SYSBUF bits, then I3CBUF can be configured to select any input buffer.
- These bit selections are unimplemented on pins that do not support I3C. Refer to “Pin Allocation Table” to determine the pins that support I3C functionality.
| Name: | RxyFEAT |
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| SLEW[1:0] | I3CBUF[2:0] | SYSBUF[2:0] | |||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | |
Bits 7:6 – SLEW[1:0] I2C Specific Slew Rate Limiting Control(1)
| Value | Description |
|---|---|
| 11 | I2C Fast mode Plus (1 MHz) slew rate enabled. The SLRxy bit is ignored. |
| 10 | Reserved |
| 01 | I2C Fast mode (400 kHz) slew rate enabled. The SLRxy bit is ignored. |
| 00 | Standard GPIO Slew Rate; enabled/disabled via the SLRxy bit. |
Bits 5:3 – I3CBUF[2:0] I3C Module Input Buffer Selection(2,3)
| Value | Description |
|---|---|
| 111-110 | Reserved |
| 101 | I3C Low-Voltage (LV) Buffer |
| 100 | I3C Fast Schmitt Trigger (FST) Buffer |
| 011 | SMBus 3.0 (1.35V) Buffer |
| 010 | SMBus 2.0 (2.1V) Buffer |
| 001 | I2C Buffer |
| 000 | Standard GPIO Buffer (ST or LVBUF) selected via the INLVLx registers |