Datasheet

1009
SAM9X25 [DATASHEET]
11054E–ATARM–10-Mar-2014
44.9.5 SSC Transmit Clock Mode Register
Name: SSC_TCMR
Address: 0xF0010018
Access: Read-write
This register can only be written if the WPEN bit is cleared in “SSC Write Protect Mode Register” .
• CKS: Transmit Clock Selection
• CKO: Transmit Clock Output Mode Selection
• CKI: Transmit Clock Inversion
0 = The data outputs (Data and Frame Sync signals) are shifted out on Transmit Clock falling edge. The Frame sync signal input
is sampled on Transmit clock rising edge.
1 = The data outputs (Data and Frame Sync signals) are shifted out on Transmit Clock rising edge. The Frame sync signal input
is sampled on Transmit clock falling edge.
CKI affects only the Transmit Clock and not the output clock signal.
• CKG: Transmit Clock Gating Selection
31 30 29 28 27 26 25 24
PERIOD
23 22 21 20 19 18 17 16
STTDLY
15 14 13 12 11 10 9 8
–––– START
76543210
CKG CKI CKO CKS
Value Name Description
0 MCK Divided Clock
1RK
RK Clock signal
2TK
TK pin
Value Name Description
0 NONE None, TK pin is an input
1 CONTINUOUS
Continuous Transmit Clock, TK pin is an output
2 TRANSFER
Transmit Clock only during data transfers, TK pin is an output
Value Name Description
0 CONTINUOUS None
1 EN_TF_LOW
Transmit Clock enabled only if TF pin is Low
2EN_TF_HIGH
Transmit Clock enabled only if TF pin is High