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SAA1305T/N1,112

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P32
2004 Jan 15 22
Philips Semiconductors Product specification
On/off logic IC SAA1305T
Fig.16 V
L
timer behaviour (voltage drops >250 ms).
handbook, full pagewidth
MGR210
input D0 = LOW
RP = HIGH
RP = LOW
POWER-OFF
SAA1305T main supplymicrocontroller
CHI = LOW
ON/OFF = HIGH
I
2
C-bus read status register
CHI = HIGH
250 ms
1 ms
250 ms
1 ms
TS = LOW
ON/OFF = LOW
RP = HIGH
RP = LOW
CHI = LOW
ON/OFF = HIGH
TS = LOW
ON/OFF = LOW
sequence runs untill signal input D0 = HIGH
Fig.17 V
L
timer behaviour (voltage drops <250 ms).
handbook, full pagewidth
MGR211
input D0 = LOW
input D0 = HIGH
RP = HIGH
RP = LOW
POWER-OFF
POWER-ON
SAA1305T main supplymicrocontroller
CHI = LOW
ON/OFF = HIGH
I
2
C-bus read status/old/new register
CHI = HIGH
t < 250 ms
1 ms
250 ms
250 ms
TS = LOW
ON/OFF = LOW
WD = HIGH
WD = LOW
WD = LOW
2004 Jan 15 23
Philips Semiconductors Product specification
On/off logic IC SAA1305T
Fig.18 Wake-up via alarm.
(1) See Fig.5.
handbook, full pagewidth
MGR212
RP = HIGH
RP = LOW
POWER-OFF
POWER-ON
SAA1305T main supplymicrocontroller
CHI = LOW
ON/OFF = HIGH (A/D supply is on)
I
2
C-bus read status/old/new register
I
2
C-bus write alarm timer
I
2
C-bus write ENABLE-RESET
CHI = HIGH
programmable
time
1 ms
ON/OFF = LOW (A/D supply is off)
Watchdog timer trigger sequence
(1)
Fig.19 Behaviour after missed I
2
C-bus read sequence.
handbook, full pagewidth
MGR213
input Dx
RP = HIGH
RP = LOW
SAA1305T main supplymicrocontroller
POWER-OFF
WD = LOW (HIGH)
WD = HIGH (LOW)
CHI = LOW
0 to 300 ms
0 to 300 ms
1 to 20 ms
2004 Jan 15 24
Philips Semiconductors Product specification
On/off logic IC SAA1305T
ON/OFF LOGIC WITH SWITCHED MICROCONTROLLER SUPPLY
Fig.20 Block diagram with switched microcontroller supply.
handbook, full pagewidth
MGR214
5 V
REGULATOR
5 V
CONTINUOUS
REGULATOR
SAA1305T
ON/OFF
RES
RESET
5 V
5 V
14 V
WD
RP
MICRO-
CONTROLLER
SDA
SCL
9
10
D0 to D7
1 to 8
11
24
23
21
20
18
CHI
handbook, full pagewidth
MGR215
ON/OFF
RES
14 V
RP
WD
CHI
ON/OFF
Dx
CHI
RP
WD
(1) (1)
Fig.21 On/off description with switched microcontroller supply.
(1) Level not defined.
a. First power-on. b. Normal switch-on.
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27P28-P30P31-P32

SAA1305T/N1,112

Mfr. #:
Buy SAA1305T/N1,112
Manufacturer:
NXP Semiconductors
Description:
Encoders, Decoders, Multiplexers & Demultiplexers ANALOG AUDIO MISC
Lifecycle:
New from this manufacturer.
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