Samsung S5PC100 User Manual page 610

S5PC100 USER'S MANUAL (REV1.0)
4 REGISTER DESCRIPTION
Register Address
WTCON 0xEA20_0000
WTDAT 0xEA20_0004
WTCNT 0xEA20_0008
WTCLRINT 0xEA20_000C
4.1 WATCHDOG TIMER CONTROL REGISTER (WTCON, R/W, ADDRESS = 0XEA20_0000)
The WTCON register allows you to enable/ disable the watchdog timer, select the clock signal from 4 different
sources, enable/ disable interrupts, and enable/ disable the watchdog timer output.
The Watchdog timer is used to resume the S5PC100 restart on mal-function after its power on; if controller restart
is not desired, the Watchdog timer should be disabled.
If you want to use the normal timer provided by the Watchdog timer, enable the interrupt and disable the
Watchdog timer.
WTCON
Reserved
Prescaler value
Reserved
Watchdog timer
Clock select
Interrupt generation
Reserved
Reset enable/disable
R/W
R/W Watchdog Timer Control Register
R/W Watchdog Timer Data Register
R/W Watchdog Timer Count Register
W Watchdog Timer Interrupt Clear Register
Bit
[31:16] Reserved
[15:8] Prescaler value.
The valid range is from 0 to (2
[7:6] Reserved.
These two bits must be 00 in normal operation.
[5] Enable or disable Watchdog timer bit.
0 = Disable
1 = Enable
[4:3] Determines the clock division factor.
00 = 16
01 = 32
10 = 64
11 = 128
[2] Enable or disable interrupt bit.
0 = Disable
1 = Enable
[1] Reserved.
This bit must be 0 in normal operation.
[0] Enable or disable Watchdog timer output bit for reset signal.
1 = Asserts reset signal of the S5PC100 at watchdog time-out
0 = Disable the reset function of the watchdog timer.
Description
Description
8
-1).
WATCHDOG TIMER
Reset Value
0x00008021
0x00008000
0x00008000
-
Reset Value
0
0x80
00
1
00
0
0
1
7.3-3