Datasheet

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ChannelSelectionBits(Read/Write)
Channel1
Channel0
Channel2
Channel3
Channel4
Channel5
Channel6
Channel7
B7 B6 B5 B4 B3 B2 B1 B0
RESETInput
PCA9548A
8-CHANNELI
2
CSWITCH
WITHRESET
SCPS143C–OCTOBER2006–REVISEDJUNE2007
Figure5.ControlRegister
CommandByteDefinition
CONTROLREGISTERBITS
COMMAND
B7B6B5B4B3B2B1B0
0Channel0disabled
XXXXXXX
1Channel0enabled
0Channel1disabled
XXXXXXX
1Channel1enabled
0Channel2disabled
XXXXXXX
1Channel2enabled
0Channel3disabled
XXXXXXX
1Channel3enabled
0Channel4disabled
XXXXXXX
1Channel4enabled
0Channel5disabled
XXXXXXX
1Channel5enabled
0Channel6disabled
XXXXXXX
1Channel6enabled
0Channel7disabled
XXXXXXX
1Channel7enabled
Nochannelselected,
00000000
power-up/resetdefaultstate
TheRESETinputisanactive-lowsignalthatmaybeusedtorecoverfromabus-faultcondition.Whenthis
signalisassertedlowforaminimumoft
WL
,thePCA9548AresetsitsregistersandI
2
Cstatemachineand
deselectsallchannels.TheRESETinputmustbeconnectedtoV
CC
throughapullupresistor.
7
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