24AA32A/24LC32A - Parallax Inc

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24AA32A/24LC32AFIGURE 4-1:BYTE WRITEBus ActivityMasterSDA LineSTARTControlByteS 1010A A A 2 1 0 0AddressHigh BytexxxxAddressLow ByteDataSTOPPBus ActivityACKACKACKACKx = “don’t care” bitFIGURE 4-2:PAGE WRITEBus ActivityMasterSDA LineSTARTControlByteS 1010A A A 2 1 0 0AddressHigh BytexxxxAddressLow Byte Data Byte 0Data Byte 31STOPPBus Activityx = “don’t care” bitACKACKACKACKACKDS21713F-page 8© 2005 Microchip Technology Inc.
24AA32A/24LC32A5.0 ACKNOWLEDGE POLLINGSince the device will not acknowledge during a writecycle, this can be used to determine when the cycle iscomplete (this feature can be used to maximize busthroughput). Once the Stop condition for a Writecommand has been issued from the master, the deviceinitiates the internally-timed write cycle. ACK pollingcan then be initiated immediately. This involves themaster sending a Start condition followed by the controlbyte for a Write command (R/W = 0). If the device is stillbusy with the write cycle, then no ACK will be returned.If no ACK is returned, the Start bit and control byte mustbe re-sent. If the cycle is complete, the device willreturn the ACK and the master can then proceed withthe next Read or Write command. See Figure 5-1 forflow diagram of this operation.FIGURE 5-1:ACKNOWLEDGE POLLINGFLOWSendWrite CommandSend StopCondition toInitiate Write CycleSend StartSend Control Bytewith R/W = 0Did DeviceAcknowledge(ACK = 0)?NoYesNextOperation© 2005 Microchip Technology Inc. DS21713F-page 9
Page 1 and 2: 24AA32A/24LC32A32K I 2 C Serial EE
Page 3 and 4: 24AA32A/24LC32ATABLE 1-2:AC CHARACT
Page 5 and 6: 24AA32A/24LC32A2.0 FUNCTIONAL DESCR
Page 7: 24AA32A/24LC32A4.0 WRITE OPERATIONS
Page 11 and 12: 24AA32A/24LC32AFIGURE 6-2:Bus Activ
Page 13 and 14: 24AA32A/24LC32A8.0 PACKAGING INFORM
Page 15 and 16: 24AA32A/24LC32A8-Lead Plastic Dual
Page 17 and 18: 24AA32A/24LC32A8-Lead Plastic Small
Page 19 and 20: 24AA32A/24LC32A8-Lead Plastic Dual
Page 21 and 22: 24AA32A/24LC32AAPPENDIX A: REVISION
Page 23 and 24: 24AA32A/24LC32ATHE MICROCHIP WEB SI
Page 25 and 26: 24AA32A/24LC32APRODUCT IDENTIFICATI
Page 27 and 28: Note the following details of the c

24AA32A/24LC32A - Parallax Inc

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