W79E632A Datasheet, PDF (48/79 Pages) Winbond – 8-BIT MICROCONTROLLER

W79E632A/W79L632A
PWM4 Register
Bit:
7
6
5
4
3
2
1
0
Mnemonic: PWM4
PWM Control 2 Register
Bit:
7
6
5
-
-
-
Mnemonic: PWMCON2
PWM5OE: Output enable for PWM5
PWM4OE: Output enable for PWM4
ENPWM5: Enable for PWM5
ENPWM4: Enable for PWM4
PWM5 Register
Bit:
7
6
5
Address: CFH
4
3
2
1
0
-
PWM5OE- PWM4OE ENWPM5 ENWPM4
Address: CEH
4
3
2
1
0
Mnemonic: PWM5
Address: C3H
10.4 Watchdog Timer
The Watchdog timer is a free-running timer which can be programmed by the user to serve as a system
monitor, a time-base generator or an event timer. It is basically a set of dividers that divide the system
clock. The divider output is selectable and determines the time-out interval. When the time-out occurs a
flag is set, which can cause an interrupt if enabled, and a system reset can also be caused if it is
enabled. The interrupt will occur if the individual interrupt enable and the global enable are set. The
interrupt and reset functions are independent of each other and may be used separately or together
depending on the user’s software.
XT
0
Reset Watchdog
RWT (WDCON.0)
16
17 19
20 22
23 25
WD1,WD0
00
01
10 _Time-out
11
WDIF
EWDI(EIE.4)
WTRF
512 clock
delay
Enable Watchdog timer reset
EWT(WDCON.1)
Interrupt
Reset
Figure 19. Watchdog Timer
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