mc68hc908bd48 Freescale Semiconductor, Inc, mc68hc908bd48 Datasheet - Page 207
mc68hc908bd48
Manufacturer Part Number
mc68hc908bd48
Description
M68hc08 Microcontrollers Microcontroller
Manufacturer
Freescale Semiconductor, Inc
Datasheet
1.MC68HC908BD48.pdf
(288 pages)
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MC68HC908BD48
Freescale Semiconductor
Figure 15-8. 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
KEY: shaded data packets indicate a transmit by the MCU’s DDC module
TXBE=0
MRW=0
MAST=1
Data1 → DDTR
RXBF=0
MRW=1
MAST=1
TXBE=0
(dummy data → DDTR)
TXBE=1
RXBF=0
TXBE=0
RXBF=0
START
START
START
START
—
Rev. 2.1
Address
Address
Address
Address
RXIF=1
RXBF=1
MATCH=1
SRW=0
TXBE=1
TXIF=1
Data2 → DDTR
RXIF=1
RXBF=1
MATCH=1
SRW=1
Data1 → DDTR
0
1
1
0
ACK
ACK
ACK
ACK
DDC12AB Interface
RX Data1
RX Data1
TX Data1
TX Data1
TXBE=1
TXIF=1
Data2 → DDTR
TXBE=1
TXIF=1
Data3 → DDTR
Data1 → DDRR
RXIF=1
RXBF=1
Data1 → DDRR
RXIF=1
RXBF=1
ACK
ACK
ACK
ACK
RX DataN
RX DataN
TX DataN
TX DataN
DataN+2 → DDTR
DataN → DDRR
DataN+2 → DDTR
DataN → DDRR
RXBF=1
RXBF=1
TXBE=1
TXBE=1
RXIF=1
RXIF=1
TXIF=1
TXIF=1
NAK
NAK
NAK
NAK
DDC12AB Interface
NAKIF=1
MAST=0
TXBE=0
NAKIF=1
MAST=0
NAKIF=1
TXBE=0
STOP
STOP
STOP
STOP
Data Sheet
207
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