MC912DG128A Motorola, MC912DG128A Datasheet - Page 268

• Manufacturer Part Number: MC912DG128A
• Description: Microcontrollers
• Manufacturer: Motorola

Inter-IC Bus
MC68HC912DT128A Rev 2.0
268
Dummy Read
From IBDR
Switch To
Rx Mode
Y
Byte To IBDR
(Master Rx)
Transmitted
Addr Cycle
Write Next
Last Byte
RXAK=0
End Of
?
?
?
N
Y
N
Figure 40 Flow-Chart of Typical IIC Interrupt Routine
Stop Signal
TX
Generate
Y
N
Tx/Rx
Set TXAK =1
?
Y
Byte To Be Read
Byte To Be Read
From IBDR
Read Data
And Store
2nd Last
RX
Last
?
?
N
N
Stop Signal
Generate
Inter-IC Bus
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
ACK From
Arbitration
Switch To
Receiver
Rx Mode
IAAS=1
TX/RX
Lost
?
?
?
?
N
N
TX
Data Transfer
N
From IBDR
Read Data
And Store
MOTOROLA
RX
22-iicbus