Philips Semiconductors
Product specification
On/off logic IC
SAA1305T
Scenarios for ON/OFF logic with microcontroller in power-down state
5 V continuous
regulator
handbook, full pagewidth
SAA1305T
microcontroller
RES = LOW
RP = HIGH
220 ms (hardware specific)
RES = HIGH
ON/OFF = HIGH (A/D supply)
CHI = LOW
20 ms
RP = LOW
2
I C-bus read status/old/new register
CHI = HIGH
2
I C-bus write reset time/blink/LED status
2
I C-bus write ENABLE-RESET
MGR208
Fig.14 Proper first connection on power supply.
SAA1305T
handbook, full pagewidth
microcontroller
main supply
Dx
RP = HIGH
ON/OFF = HIGH
CHI = LOW
1 ms
RP = LOW
2
I C-bus read status/old/new register
CHI = HIGH
WD = LOW
250 ms
250 ms
POWER-ON
WD = HIGH
WD = LOW
MGR209
Fig.15 Switch-on after a valid input change.
2004 Jan 15
21
PANASONIC [ PANASONIC ]
