![Samsung S3C2416 User Manual Download Page 282](http://html.mh-extra.com/html/samsung/s3c2416/s3c2416_user-manual_340824282.webp)
WATCHDOG TIMER
S3C2416X RISC MICROPROCESSOR
11-4
3 WATCHDOG TIMER SPECIAL REGISTERS
3.1 WATCHDOG TIMER CONTROL (WTCON) REGISTER
The WTCON register allows the user 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 S3C2416 restart on malfunction after its power on. At this time,
disable the interrupt generation and enable the Watchdog timer output for reset signal.
If controller restart is not desired and if the user wants to use the normal timer only, which is provided by the
Watchdog timer, enable the interrupt generation and disable the Watchdog timer output for reset signal.
Register
Address
R/W
Description
Reset Value
WTCON 0x53000000
R/W
Watchdog
timer control register
0x8021
WTCON
Bit
Description
Initial State
Prescaler value
[15:8] Prescaler value.
The valid range is from 0 to 255(28-1).
0x80
Reserved [7:6]
Reserved.
These two bits must be 00 in normal operation.
00
Watchdog timer
[5]
Enable or disable bit of Watchdog timer.
0 = Disable
1 = Enable
1
Clock select
[4:3] Determine the clock division factor.
00 = 16
01 = 32
10 = 64
11 = 128
00
Interrupt
generation
[2]
Enable or disable bit of the interrupt.
0 = Disable
1 = Enable
0
Reserved [1]
Reserved.
This bit must be 0 in normal operation.
0
Reset
enable/disable
[0]
Enable or disable bit of Watchdog timer output for reset signal.
1 = Assert reset signal of the S3C2416 at watchdog time-out
0 = Disable the reset function of the watchdog timer.
1
NOTE:
Initial state of ‘Reset enable/disable’ is 1(reset enable). If user do not disable this bit, S3C2416 will be rebooted in
about 5.63sec (In the case of PCLK is 12MHz). So at boot loader, this bit should be disabled before under control of
Operating System, or Firmware.
Summary of Contents for S3C2416
Page 122: ...BUS MATRIX EBI S3C2416X RISC MICROPROCESSOR 3 4 NOTES ...
Page 204: ...DMA CONTROLLER S3C2416X RISC MICROPROCESSOR 8 18 NOTES ...
Page 284: ...WATCHDOG TIMER S3C2416X RISC MICROPROCESSOR 11 6 NOTES ...
Page 320: ...REAL TIME CLOCK S3C2416X RISC MICROPROCESSOR 13 16 NOTES ...
Page 344: ...UART S3C2416X RISC MICROPROCESSOR 14 24 NOTES ...
Page 380: ...USB2 0 DEVICE S3C2416X RISC MICROPROCESSOR 16 34 NOTES ...
Page 432: ...2D S3C2416X RISC MICROPROCESSOR 18 38 NOTES ...
Page 446: ...HS_SPI CONTROLLER S3C2416X RISC MICROPROCESSOR 19 14 NOTES ...
Page 604: ...S3C2416X RISC MICROPROCESSOR S3C2416X RISC MICROPROCESSOR 23 22 NOTES ...
Page 638: ...PCM AUDIO INTERFACE S3C2416X RISC MICROPROCESSOR 25 18 NOTES ...
Page 670: ...ELECTRICAL DATA S3C2416X RISC MICROPROCESSOR 26 32 NOTES ...