mc9s12xd256 Freescale Semiconductor, Inc, mc9s12xd256 Datasheet - Page 417

• Manufacturer Part Number: mc9s12xd256
• Description: Hcs12x Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Freescale Semiconductor
Dummy Read
From IBDR
Switch To
Rx Mode
Y
Byte To IBDR
(Master Rx)
Transmitted
Addr Cycle
Last Byte
Write Next
RXAK=0
End Of
?
?
?
Y
N
N
TX
Stop Signal
Generate
Y
N
Figure 9-12. Flow-Chart of Typical IIC Interrupt Routine
Tx/Rx
Set TXAK =1
?
Y
Byte To Be Read
Byte To Be Read
MC9S12XDP512 Data Sheet, Rev. 2.17
From IBDR
Read Data
And Store
2nd Last
RX
Last
?
?
N
N
Stop Signal
Generate
Y
Y
RTI
Master
Mode
Clear
IBIF
?
Chapter 9 Inter-Integrated Circuit (IICV2) Block Description
Write Data
To IBDR
(Read)
Set TX
Mode
N
N
Y
Dummy Read
From IBDR
Clear IBAL
IAAS=1
Set RX
SRW=1
Mode
Y
?
?
N
Address Transfer
(Write)
Tx Next
Byte
Y
Y
Y
Dummy Read
From IBDR
Arbitration
ACK From
Switch To
Receiver
IAAS=1
Rx Mode
TX/RX
Lost
?
?
?
?
N
N
N
TX
Data Transfer
From IBDR
Read Data
And Store
RX
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