Data Sheet

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28
ETHERIO24TCPDATASHEET
OverviewofI2CMode
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TheI
2
CinterfacethatisimplementedontheEtherIO24TCPisavery
basicI
2
Cmaster.TheI
2
Cmodeonlyhastheoneclockspeedwhichis
mentionedbelowinthespecifications.TheI
2
Cinterfacecanbeusedto
communicatewithA/D,GPIOExpander,EEPROMchipstonameafew.Shownin
thediagrambelowisthetypicalconnectionofanI
2
CdevicetotheEther
IO24TCP.
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ConnectiondiagrambetweenEtherIO24TCPPortAandanI
2
Cdevice
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Po rt A 0
Po rt A 1
I2C Devic e
Et h e r I/O 2 4
SC L
SD A
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ListedbelowistheI
2
CpinconnectionsusedbytheEtherIO24TCPonall
Ports.
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• PortBit0isSerialClock(SCL)andwillbesetasanoutputwhen
inI
2
CMode
• PortBit1isSerialData(SDA)
• AllotherPortpinsactasnormal
• AnyoftheotherpinscanbeusedforotherfunctionswhenI
2
Cis
used.
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I2CSPECIFICATIONS
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Thetablebelowoutlinesthespecificationsofthe
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I
2
Cmodeimplementedon
theEtherIO24TCP.
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Symbol Parameter Min Max Units
t1 us mS
t2 mS
tp ClockPeriod 60 uS
tb uS
td uS
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©
2013ElexolPtyLtd Revision1.3
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