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S3C8275X/F8275X/C8278X/F8278X/C8274X/F8274X
WTCON
— Watch Timer Control Register
Bit Identifier
Reset Value
Read/Write
Addressing Mode
.7
.6
.5–.4
.3–.2
.1
.0
NOTE: Watch timer clock frequency (fw) is assumed to be 32.768 kHz.
.7
.6
0
0
R/W
R/W
Register addressing mode only
Watch Timer Clock Selection Bit
0
Main system clock divided by 2
1
Sub system clock (fxt)
Watch Timer Interrupt Enable Bit
0
Disable watch timer interrupt
1
Enable watch timer interrupt
Buzzer Signal Selection Bits
0
0
0.5 kHz
0
1
1 kHz
1
0
2 kHz
1
1
4 kHz
Watch Timer Speed Selection Bits
0
0
Set watch timer interrupt to 1s
0
1
Set watch timer interrupt to 0.5s
1
0
Set watch timer interrupt to 0.25s
1
1
Set watch timer interrupt to 3.91ms
Watch Timer Enable Bit
0
Disable watch timer; Clear frequency dividing circuits
1
Enable watch timer
Watch Timer Interrupt Pending Bit
0
Interrupt is not pending, clear pending bit when write
1
Interrupt is pending
.5
.4
0
0
R/W
R/W
R/W
7
(fx/128)
CONTROL REGISTER
E1H
Set 1, Bank 1
.3
.2
.1
0
0
0
R/W
R/W
.0
0
R/W
4-47
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