mcf51ac256a Freescale Semiconductor, Inc, mcf51ac256a Datasheet - Page 290

• Manufacturer Part Number: mcf51ac256a
• Description: Mcf51ac Flexis
• Manufacturer: Freescale Semiconductor, Inc

NOTES:
1. If general call is enabled, a check must be done to determine whether the received address was a general call address (0x00). If the received address was a
2. When 10-bit addressing is used to address a slave, the slave sees an interrupt following the first byte of the extended address. User software must ensure that for
Inter-Integrated Circuit (IICV2)
12-18
general call address, then the general call must be handled by user software.
this interrupt, the contents of IICD are ignored and not treated as a valid data transfer.
Dummy Read
Switch to
from IICD
Rx Mode
Y
Transmitted
(Master Rx)
Byte to IICD
Addr Cycle
Write Next
Last Byte
RXAK=0
End of
?
?
?
Y
N
N
MCF51AC256 ColdFire Integrated Microcontroller Reference Manual, Rev. 5
Stop Signal
TX
Generate
(MST = 0)
Y
N
Tx/Rx
Set TXACK =1
?
Figure 12-11. Typical IIC Interrupt Routine
Y
Byte to Be Read
Byte to Be Read
Read Data
from IICD
and Store
2nd Last
RX
Last
?
?
N
N
Stop Signal
Generate
(MST = 0)
Y
Y
RTI
Master
Mode
Clear
IICIF
?
Write Data
(Read)
Set TX
to IICD
Mode
N
N
Y
Dummy Read
Clear ARBL
from IICD
IAAS=1
Set RX
SRW=1
Mode
Y
?
?
N
Address Transfer
(Write)
See Note 1
Tx Next
Byte
Y
Y
Y
Dummy Read
ACK from
from IICD
Arbitration
Receiver
Switch to
Freescale Semiconductor
IAAS=1
Rx Mode
TX/RX
Lost
?
?
?
?
N
N
N
Data Transfer
TX
See Note 2
Read Data
from IICD
and Store
RX