Samsung S3C8245 User Manual
WATCH TIMER
S3C8245/P8245/C8249/P8249
13-2
WATCH TIMER CONTROL REGISTER (WTCON: R/W)
FBH
WTCON.7
WTCON.6
WTCON.5
WTCON.4
WTCON.3
WTCON.2
WTCON.1
WTCON.0
nRESET
"0"
"0"
"0"
"0"
"0"
"0"
"0"
"0"
Table 13-1. Watch Timer Control Register (WTCON): Set 1, Bank 1, FAH, R/W
Bit Name
Values
Function
Address
WTCON.7
0
Select (fxx/128) as the watch timer clock
FAH
1
Select subsystem clock as watch timer clock
WTCON.6
0
Disable watch timer interrupt
1
Enable watch timer interrupt
WTCON.5–.4
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
WTCON.3–.2
0
0
Set watch timer interrupt to 0.5 s.
0
1
Set watch timer interrupt to 0.25 s.
1
0
Set watch timer interrupt to 0.125 s.
1
1
Set watch timer interrupt to 1.955 ms.
WTCON.1
0
Disable watch timer, clear frequency dividing circuits
1
Enable watch timer
WTCON.0
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.