Philips Semiconductors
Product specification
On/off logic IC
SAA1305T
SAA1305T
input D0 = LOW
5 V regulator
microcontroller
25 ms
handbook, full pagewidth
TS = LOW
ON/OFF = LOW
RESET = HIGH
250 ms
10 ms
RP = HIGH
CHI = LOW
ON/OFF = HIGH
RP = LOW
(1)
input D0 = HIGH
2
I C-bus read status/old/new register
CHI = HIGH
WD = LOW
WD = HIGH
WD = LOW
250 ms
250 ms
MGR218
(1) If input D0 = LOW, the microcontroller will restart the VL timer.
Fig.24 VL timer behaviour.
SAA1305T
handbook, full pagewidth
5 V regulator
microcontroller
wrong or missed Watchdog timer trigger signal
RP = HIGH
1 to 20 ms
300 ms
RP = LOW
CHI = LOW
wrong or missed Watchdog timer trigger signal
wrong or missed Watchdog timer trigger signal
4 times
RP = HIGH
RP = LOW
1 to 20 ms
300 ms
ON/OFF = LOW
MGR219
Fig.25 Wrong or missed Watchdog timer trigger.
2004 Jan 15
26
PANASONIC [ PANASONIC ]
