Samsung S3C8245 User Manual
S3C8245/P8245/C8249/P8249
CONTROL REGISTER
4-47
WTCON
— Watch Timer Control Register
FAH
Set 1, Bank 1
Bit Identifier
.7
.6
.5
.4
.3
.2
.1
.0
nRESET 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
Watch Timer Clock Selection Bit
0
Main system clock divided by 2
7
(fxx/128)
1
Sub system clock (fxt)
.6
Watch Timer Interrupt Enable Bit
0
Disable watch timer interrupt
1
Enable watch timer interrupt
.5–.4
Buzzer Signal Selection Bits
0
0
0.5 kHz buzzer (BUZ) signal output
0
1
1 kHz buzzer (BUZ) signal output
1
0
2 kHz buzzer (BUZ) signal output
1
1
4 kHz buzzer (BUZ) signal output
.3–.2
Watch Timer Speed Selection Bits
0
0
0.5 s Interval
0
1
0.25 s Interval
1
0
0.125 s Interval
1
1
1.955 ms Interval
.1
Watch Timer Enable Bit
0
Disable watch timer; Clear frequency dividing circuits
1
Enable watch timer
.0
Watch Timer Interrupt Pending Bit
0
Interrupt is not pending, clear pending bit when write
1
Interrupt is pending
NOTE:
Watch timer clock frequency(fw) is assumed to be 32.768 kHz.