Samsung 8-Bit CMOS Microcontroller, S3C9228/P9228 SIOCON SIO Control Register E1H

S3C9228/P9228 CONTROL REGISTERS
4-33
SIOCON — SIO Control Register E1H
Bit Identifier .7 .6 .5 .4 .3 .2 .1 .0
RESETRESET Value 0000000–
Read/Write R/W R/W R/W R/W R/W R/W R/W –
.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
.5SIO 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
.2SIO Shift Operation Enable Bit
0Disable shifter and clock counter
1Enable shifter and clock counter
.1SIO Interrupt Enable Bit
0Disable SIO interrupt
1Enable SIO interrupt
.0Not used for S3C9228/P9228