83C576 Philips Semiconductors, 83C576 Datasheet - Page 20

• Manufacturer Part Number: 83C576
• Description: 80C51 8-bit microcontroller family 8K/256 OTP/ROM/ 6 channel 10-bit A/D/ 4 comparators/ failure detect circuitry/ watchdog timer
• Manufacturer: Philips Semiconductors

Philips Semiconductors
1998 Jun 04
80C51 8-bit microcontroller family
8K/256 OTP/ROM, 6 channel 10-bit A/D, 4 comparators,
failure detect circuitry, watchdog timer
OSC/2
WATCHDOG FEED SEQUENCE
WATCHDOG FEED SEQUENCE
MOV WFEED1,#0A5H
MOV WFEED2,#5AH
MOV WFEED1,#0A5H
MOV WFEED2,#5AH
OSC/2
Figure 16. Watchdog Timer of 83C576 in Watchdog Mode (EA = 1, WDMOD = 1)
Figure 17. Watchdog Timer of 83C576 in Timer Mode (EA = 1, WDMOD = 0)
PRE2
PRE2
PRESCALER
PRESCALER
PRE1
PRE1
PRE0
PRE0
LVRE
LVRE
20
OFRE
OFRE
8–BIT DOWN
8–BIT DOWN
COUNTER
COUNTER
WDL
DPD
DPD
WDRUN
WDRUN
(C1H)
1
WDMOD
WDMOD
1
0
83C576/87C576
CONTENT
WDL
WDCON
CONTENT
WDCON
WDCON
WDCON
RESET
WDTOF (PCON.2)
(C4H)
(C4H)
WDTOF (PCON.2)
ROM–CODE
ROM–CODE
Product specification
ADDRESS
ADDRESS
SU00659C
2031H
2030H
SU00658C
2030H