Samsung S5PC110 Manual page 778

S5PC110_UM
3.4.1.1 Watchdog Timer Control Register (WTCON, R/W, Address = 0xE270_0000)
The WTCON register allows you to enable/ disable the watchdog timer, select the clock signal from four different
sources, enable/ disable interrupts, and enable/ disable the watchdog timer output.
The Watchdog timer is used to restart the S5PC110 to recover from mal-function; 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
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] Enables or disables Watchdog timer bit.
0 = Disables
1 = Enables
[4:3] Determines the clock division factor.
00 = 16
01 = 32
10 = 64
11 = 128
[2] Enables or disables interrupt bit.
0 = Disables
1 = Enables
[1] Reserved.
This bit must be 0 in normal operation.
[0] Enables or disables Watchdog timer output bit for reset
signal.
1 = Asserts reset signal of the S5PC110 at watchdog time-out
0 = Disables the reset function of the watchdog timer.
Description
8
-1).
3 WATCHDOG TIMER
Initial State
0
0x80
00
1
00
0
0
1
3-5