AT91SAM7S32-AI ATMEL [ATMEL Corporation], AT91SAM7S32-AI Datasheet - Page 314

• Manufacturer Part Number: AT91SAM7S32-AI
• Description: AT91 ARM Thumb-based Microcontrollers
• Manufacturer: ATMEL [ATMEL Corporation]

Receiver Clock
Management
314
AT91SAM7S32 Preliminary
Figure 135. Transmitter Clock Management
The receiver clock is generated from the transmitter clock or the divider clock or an external
clock scanned on the RK I/O pad. The Receive Clock is selected by the CKS field in
SSC_RCMR (Receive Clock Mode Register). Receive Clocks can be inverted independently
by the CKI bits in SSC_RCMR.
The receiver can also drive the RK I/O pad continuously or be limited to the actual data trans-
fer. The clock output is configured by the SSC_RCMR register. The Receive Clock Inversion
(CKI) bits have no effect on the clock outputs. Programming the RCMR register to select RK
pin (CKS field) and at the same time Continuous Receive Clock (CKO field) might lead to
unpredictable results.
Figure 136. Receiver Clock Management
Transmitter Clock
Receiver Clock
Divider Clock
Divider Clock
RK
TK
SSC_RCMR.CKS
SSC_TCMR.CKS
0
1
0
1
SSC_RCMR.CKO
SSC_TCMR.CKO
SSC_RCMR.CKI
SSC_TCMR.CKI
Transmitter Clock
Receiver Clock
6071A–ATARM–28-Oct-04
RK
TK