43.9.3 SSC Receive Clock Mode Register
This register can only be written if the WPEN bit is cleared in the SSC Write Protection Mode Register.
| Name: | SSC_RCMR |
| Offset: | 0x10 |
| Reset: | 0x00000000 |
| Property: | Read/Write |
| Bit | 31 | 30 | 29 | 28 | 27 | 26 | 25 | 24 | |
| PERIOD[7:0] | |||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Bit | 23 | 22 | 21 | 20 | 19 | 18 | 17 | 16 | |
| STTDLY[7:0] | |||||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Bit | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | |
| STOP | START[3:0] | ||||||||
| Access | R/W | R/W | R/W | R/W | R/W | ||||
| Reset | 0 | 0 | 0 | 0 | 0 | ||||
| Bit | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 | |
| CKG[1:0] | CKI | CKO[2:0] | CKS[1:0] | ||||||
| Access | R/W | R/W | R/W | R/W | R/W | R/W | R/W | R/W | |
| Reset | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | |
Bits 31:24 – PERIOD[7:0] Receive Period Divider Selection
This field selects the divider to apply to the selected Receive Clock in order to generate a new Frame Sync signal. If 0, no PERIOD signal is generated. If not 0, a PERIOD signal is generated each 2 x (PERIOD + 1) Receive Clock.
Bits 23:16 – STTDLY[7:0] Receive Start Delay
If STTDLY is not 0, a delay of STTDLY clock cycles is inserted between the start event and the current start of reception. When the receiver is programmed to start synchronously with the transmitter, the delay is also applied.
STTDLY must be configured in relation to the receive synchronization data to be stored in SSC_RSHR.
Bit 12 – STOP Receive Stop Selection
| Value | Description |
|---|---|
| 0 | After completion of a data transfer when starting with a Compare 0, the receiver stops the data transfer and waits for a new compare 0. |
| 1 | After starting a receive with a Compare 0, the receiver operates in a continuous mode until a Compare 1 is detected. |
Bits 11:8 – START[3:0] Receive Start Selection
| Value | Name | Description |
|---|---|---|
| 0 | CONTINUOUS | Continuous, as soon as the receiver is enabled, and immediately after the end of transfer of the previous data. |
| 1 | TRANSMIT | Transmit start |
| 2 | RF_LOW | Detection of a low level on RF signal |
| 3 | RF_HIGH | Detection of a high level on RF signal |
| 4 | RF_FALLING | Detection of a falling edge on RF signal |
| 5 | RF_RISING | Detection of a rising edge on RF signal |
| 6 | RF_LEVEL | Detection of any level change on RF signal |
| 7 | RF_EDGE | Detection of any edge on RF signal |
| 8 | CMP_0 | Compare 0 |
Bits 7:6 – CKG[1:0] Receive Clock Gating Selection
| Value | Name | Description |
|---|---|---|
| 0 | CONTINUOUS | None |
| 1 | EN_RF_LOW | Receive Clock enabled only if RF Low |
| 2 | EN_RF_HIGH | Receive Clock enabled only if RF High |
Bit 5 – CKI Receive Clock Inversion
CKI affects only the Receive Clock and not the output clock signal.
| Value | Description |
|---|---|
| 0 | The data inputs (Data and Frame Sync signals) are sampled on Receive Clock falling edge. The Frame Sync signal output is shifted out on Receive Clock rising edge. |
| 1 | The data inputs (Data and Frame Sync signals) are sampled on Receive Clock rising edge. The Frame Sync signal output is shifted out on Receive Clock falling edge. |
Bits 4:2 – CKO[2:0] Receive Clock Output Mode Selection
| Value | Name | Description |
|---|---|---|
| 0 | NONE | None, RK pin is an input |
| 1 | CONTINUOUS | Continuous Receive Clock, RK pin is an output |
| 2 | TRANSFER | Receive Clock only during data transfers, RK pin is an output |
Bits 1:0 – CKS[1:0] Receive Clock Selection
| Value | Name | Description |
|---|---|---|
| 0 | MCK | Divided Clock |
| 1 | TK | TK Clock signal |
| 2 | RK | RK pin |