SAA1305T Datasheet, PDF (23/32 Pages) Panasonic Semiconductor – On/off logic IC

Philips Semiconductors
On/off logic IC
Product specification
SAA1305T
handbook, full pagewidth ^SAA1305T
programmable
time
microcontroller
I²C-bus write alarm timer
I²C-bus write ENABLE-RESET
ON/OFF = LOW (A/D supply is off)
1 ms
RP = HIGH
ON/OFF = HIGH (A/D supply is on)
CHI = LOW
RP = LOW
I²C-bus read status/old/new register
CHI = HIGH
Watchdog timer trigger sequence⁽¹⁾
POWER-OFF
POWER-ON
(1) See Fig.5.
Fig.18 Wake-up via alarm.
main supply
MGR212
handbook, full pagewidth SAA1305T
input Dx
0 to 300 ms
0 to 300 ms
1 to 20 ms
CHI = LOW
WD = HIGH (LOW)
WD = LOW (HIGH)
RP = HIGH
RP = LOW
microcontroller
POWER-OFF
main supply
MGR213
2004 Jan 15
Fig.19 Behaviour after missed I²C-bus read sequence.
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