mc68hc908sr12 Freescale Semiconductor, Inc, mc68hc908sr12 Datasheet - Page 312

• Manufacturer Part Number: mc68hc908sr12
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Multi-Master IIC Interface (MMIIC)
17.8.1 Data Sequence
Data Sheet
312
Figure 17-12. Data Transfer Sequences for Master/Slave Transmit/Receive Modes
(a) Master Transmit Mode
(b) Master Receive Mode
(c) Slave Transmit Mode
(d) Slave Receive Mode
Shaded data packets indicate transmissions by the MCU
MMTXBE=0
MMRW=0
MMAST=1
Data1 → MMDTR
MMRXBF=0
MMRW=1
MMAST=1
MMTXBE=0
(dummy data → MMDTR)
MMTXBE=1
MMRXBF=0
MMTXBE=0
MMRXBF=0
START
START
START
START
Address
Address
Address
Address
MMRXIF=1
MMRXBF=1
MMATCH=1
MMSRW=0
MMTXBE=1
MMTXIF=1
Data2 → MMDTR
MMRXIF=1
MMRXBF=1
MMATCH=1
MMSRW=1
Data1 → MMDTR
0
1
1
0
Multi-Master IIC Interface (MMIIC)
ACK
ACK
ACK
ACK
RX Data1
RX Data1
TX Data1
TX Data1
MMTXBE=1
MMTXIF=1
Data2 → MMDTR
MMTXBE=1
MMTXIF=1
Data3 → MMDTR
Data1 → MMDRR
MMRXIF=1
MMRXBF=1
Data1 → MMDRR
MMRXIF=1
MMRXBF=1
ACK
ACK
ACK
ACK
MC68HC908SR12•MC68HC08SR12 — Rev. 5.0
DataN+2 → MMDTR
DataN+2 → MMDTR
TX DataN
RX DataN
TX DataN
RX DataN
DataN → MMDRR
DataN → MMDRR
MMRXBF=1
MMRXBF=1
MMTXBE=1
MMTXBE=1
MMRXIF=1
MMRXIF=1
MMTXIF=1
MMTXIF=1
Freescale Semiconductor
ACK
NAK
NAK
ACK
MMNAKIF=1
MMAST=0
MMTXBE=0
MMNAKIF=1
MMAST=0
MMNAKIF=1
MMTXBE=0
STOP
STOP
STOP
STOP