Samsung C8249, P8245, P8249, S3C8245 user manual SIOCON

CONTROL REGISTERS S3C8245/P8245/C8249/P8249
4-38
SIOCON — SIO Control Register FOHSet 1, Bank 0
Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0
nRESET Value 10000000
Read/Write R/W R/W R/W R/W R/W R/W R/W R/W
Addressing Mode Register addressing mode only
.7 SIO Shift Clock Selection Bit
0Internal clock (P.S clock)
1External clock (SCK)
.6 Data Direction Control Bit
0MSB-first mode
1LSB-first mode
.5 SIO Mode Selection Bit
0Receive-only mode
1Transmit/receive mode
.4Shift Clock Edge Selection Bit
0Tx at falling edges, Rx at rising edges
1Tx at rising edges, Rx at falling edges
.3 SIO Counter Clear and Shift Start Bit
0No action
1Clear 3-bit counter and start shifting
.2 SIO Shift Operation Enable Bit
0Disable shifter and clock counter
1Enable shifter and clock counter
.1 SIO Interrupt Enable Bit
0Disable SIO Interrupt
1Enable SIO Interrupt
.0 SIO Interrupt Pending Bit
0No interrupt pending
0Clear pending condition (when write)
1Interrupt is pending