GMS81C50 Datasheet, PDF (69/99 Pages) Hynix Semiconductor – 8-BIT SINGLE CHIP MICROCONTROLLERS

GMS81C50 Series
13. WATCH DOG TIMER
Watch Dog Timer (WDT) consists of 6-bit binary counter,
6-bit comparator, and Watch Dog Timer Register
(WDTR).
HYUNDAI
IFBIT
0
WDT0
WDT1
WDT2
WDT3
WDT4
5
WDT5
CLR
WDTON
To Reset circuit
6BIT COMPARATOR
IF WDT
WDTR WDTR0 WDTR1 WDTR2 WDTR3 WDTR4 WDTR5 WDTCL
0
6
W <00C8 h>
Internal Data Bus
Figure 13-1 Block diagram of Watch Dog Timer
13.1 Control of WDT
Watch Dog Timer can be used 6-bit general Timer or spe-
cific Watch dog timer by setting
bit5 (WDTON) of Clock Control Register (CKCTLR).
7
CKCTLR
-
Clock Control Register
0
-
WDTON ENPCK BTCL
BTS2
BTS1
BTS0
W <00C7 h>
WDTON
0
1
Watch Dog Timer Function Control
6-bit Timer
Watch Dog Timer
By assigning bit6(WDTCL) of WDTR, 6-bit counter can
be cleared.
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