Siocon Sio Control Register - Samsung S3C8275X User Manual

S3C8275X/F8275X/C8278X/F8278X/C8274X/F8274X
SIOCON
— SIO Control Register
Bit Identifier
Reset Value
Read/Write
Addressing Mode
.7
.6
.5
.4
.3
.2
.1
.0
.7 .6
0 0
R/W R/W
Register addressing mode only
SIO Shift Clock Selection Bit
0 Internal 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 shifter and clock counter
1 Enable shifter and clock counter
SIO Interrupt Enable Bit
0 Disable SIO interrupt
1 Enable SIO interrupt
SIO Interrupt Pending Bit
0 No interrupt pending (when read), Clear pending bit (when write)
0 Interrupt is pending (when read)
.5 .4
0 0
R/W R/W R/W
CONTROL REGISTER
E1H Set 1, Bank 0
.3 .2 .1
0 0 0
R/W R/W
.0
0
R/W
4-41