S3C831B Datasheet, PDF (53/316 Pages) –

CONTROL REGISTERS
S3C831B/P831B
BTCON — Basic Timer Control Register
D3H
Set 1
Bit Identifier
RESET Value
Read/Write
Addressing Mode
.7
.6
.5
.4
.3
.2
.1
.0
0
0
0
0
0
0
0
0
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Register addressing mode only
.7–.4
Watchdog Timer Function Disable Code (for System Reset)
1 0 1 0 Disable watchdog timer function
Others
Enable watchdog timer function
.3–.2
Basic Timer Input Clock Selection Bits
0 0 fxx/4096 ⁽³⁾
0 1 fxx/1024
1 0 fxx/128
1 1 fxx/16
.1
Basic Timer Counter Clear Bit ⁽¹⁾
0 No effect
1 Clear the basic timer counter value
.0
Clock Frequency Divider Clear Bit for all timers ⁽²⁾
0 No effect
1 Clear both clock frequency dividers
NOTES:
1. When you write a “1” to BTCON.1, the basic timer counter value is cleared to “00H”. Immediately following the write
operation, the BTCON.1 value is automatically cleared to “0”.
2. When you write a “1” to BTCON.0, the corresponding frequency divider is cleared to “00H”. Immediately following the
write operation, the BTCON.0 value is automatically cleared to “0”.
3. The fxx is selected clock for system (main OSC. only for S3C831B).
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