mc9s12e256 Freescale Semiconductor, Inc, mc9s12e256 Datasheet - Page 318

• Manufacturer Part Number: mc9s12e256
• Description: Hcs12 Microcontrollers 16-bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Chapter 10 Inter-Integrated Circuit (IICV2)
318
Dummy Read
From IBDR
Switch To
Rx Mode
Y
Byte To IBDR
Transmitted
(Master Rx)
Addr Cycle
Write Next
Last Byte
RXAK=0
End Of
?
?
?
Y
N
N
TX
Stop Signal
Generate
Figure 10-12. Flow-Chart of Typical IIC Interrupt Routine
Y
N
Tx/Rx
Set TXAK =1
?
Y
Byte To Be Read
Byte To Be Read
From IBDR
MC9S12E256 Data Sheet, Rev. 1.08
Read Data
And Store
2nd Last
RX
Last
?
?
N
N
Stop Signal
Generate
Y
Y
RTI
Master
Mode
Clear
IBIF
?
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
Freescale Semiconductor
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