Samsung S3C84I8 User Manual page 106

CONTROL REGISTERS
SIOCON
— Serial I/O Module Control Registers
Bit Identifier
RESET Value
Read/Write
.7
.6
.5
.4
.3
.2
.1
.0
4-34
.7 .6
0 0
R/W R/W
SIO Shift Clock Selection Bit
0 Interval clock (P.S Clock)
1 External clock (SCK)
Data Direction Control Bit
0 MSB-first mode
1 LSB-first mode
SIO Mode Selection Bit
0 Receive-only mode
1 Transmit/Receive mode
Shift Clock Edge Selection Bit
0 Tx at falling edges, Rx at rising edges.
1 Tx at rising edges, Rx at falling edges.
SIO Counter Clear and Shift Start Bit
0 No action
1 Clear 3-bit counter and start shifting
SIO Shift Operation Enable Bit
0 Disable shift and clock counter
1 Enable shift and clock counter
SIO Interrupt Enable Bit
0 Disable SIO interrupt
1 Enable SIO interrupt
SIO Interrupt Pending Bit
0 No interrupt pending
1 Interrupt pending (Clear pending bit when write)
.5 .4
0 0
R/W R/W R/W
S3C84I8/F84I8/C84I9/F84I9
F2H
.3 .2 .1
0 0 0
R/W R/W
Set 1, Bank1
.0
0
R/W