Samsung C8278X ユーザーズマニュアル
CONTROL REGISTERS
S3C8275X/F8275X/C8278X/F8278X/C8274X/F8274X
4-6
BTCON
— Basic Timer Control Register
D3H
Set 1
Bit
Identifier
.7 .6 .5 .4 .3 .2 .1 .0
Reset Value
0 0 0 0 0 0 0 0
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–.4
Watchdog Timer Function Disable Code (for System Reset)
1
0
1
0
Disable watchdog timer function
Other values
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 Basic Timer and Timer/Counters
(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
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. or sub OSC.).