PXD10RM Datasheet, PDF (751/1332 Pages) Freescale Semiconductor, Inc – PXD10 Microcontroller

Clear
IBIF
Y
Master
N
Mode
?
TX
Tx/Rx
RX
?
Last Byte
Transmitted
Y
?
N
Clear IBAL
Y ^Arbitration
Lost
?
N
RXAK=0
?
Y
End Of
Y _{Addr Cycle}
(Master Rx)
?
N
Write Next
Byte To IBDR
Last
N
Byte To Be Read
Y
?
N
Y
2nd Last
Byte To Be Read
?
N
Set TXAK =1
Generate
Stop Signal
N
Y
(Read)
IAAS=1
?
Y
IAAS=1
?
Y
N
Address Transfer
Data Transfer
SRW=1
?
N ^(Write)
TX/RX
RX
?
TX
Set TX
Mode
Write Data
To IBDR
Y ^{ACK From}
Receiver
?
N
Tx Next
Byte
Read Data
From IBDR
And Store
Switch To
Rx Mode
Set RX
Mode
Switch To
Rx Mode
Dummy Read
From IBDR
Generate
Stop Signal
Read Data
From IBDR
And Store
Dummy Read
From IBDR
Dummy Read
From IBDR
RTI
Figure 20-14. Flow-Chart of Typical I²C Interrupt Routine
Freescale Semiconductor
PXD10 Microcontroller Reference Manual, Rev. 1
Preliminary—Subject to Change Without Notice
20-21