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M16C/62P Group (M16C/62P, M16C/62PT)
17. Serial Interface
Rev.2.41
Jan 10, 2006
Page 210 of 390
REJ09B0185-0241
Figure 17.26
Transfer to UiRB Register and Interrupt Timing
(3) IICM2= 1 (UART transmit/receive interrupt), CKPH= 0
(1) IICM2= 0 (ACK and NACK interrupts), CKPH= 0 (no clock delay)
i=0 to 2
This diagram applies to the case where the following condition is met.
· UiMR register CKDIR bit = 0 (Slave selected)
ACK interrupt (DMA1 request),
NACK interrupt
Transfer to UiRB register
Receive interrupt
(DMA1 request)
Transmit interrupt
Transfer to UiRB register
(4) IICM2= 1, CKPH= 1
D6
D5
D4
D3
D2
D1
D7
SDAi
SCLi
D0
D6
D5
D4
D3
D2
D1
D7
SDAi
SCLi
D0
D6
D5
D4
D3
D2
D1
D8 (ACK, NACK)
D7
SDAi
SCLi
D0
D8 (ACK, NACK)
D8 (ACK, NACK)
D6
D5
D4
D3
D2
D1
D8 (ACK, NACK)
D7
SDAi
SCLi
D0
1st bit
2nd bit
3rd bit
4th bit
5th bit
6th bit
7th bit
8th bit
9th bit
b15
•••
b9
b8
b7
b0
D8
D7
D6
D5
D4
D3
D2
D1
D0
UiRB register
b15
•••
b9
b8
b7
b0
b15
•••
b9
b8
b7
b0
D0
D7
D6
D5
D4
D3
D2
D1
b15
•••
b9
b8
b7
b0
D0
D7
D6
D5
D4
D3
D2
D1
b15
•••
b9
b8
b7
b0
D8
D7
D6
D5
D4
D3
D2
D1
D0
1st bit
2nd bit
3rd bit
4th bit
5th bit
6th bit
7th bit
8th bit
9th bit
1st bit
2nd bit
3rd bit
4th bit
5th bit
6th bit
7th bit
8th bit
9th bit
1st bit
2nd bit
3rd bit
4th bit
5th bit
6th bit
7th bit
8th bit
9th bit
(2) IICM2= 0, CKPH= 1 (clock delay)
ACK interrupt (DMA1 request),
NACK interrupt
Transfer to UiRB register
UiRB register
Transmit interrupt
Transfer to UiRB register
Receive interrupt
(DMA1 request)
Transfer to UiRB register
UiRB register
UiRB register
UiRB register
D8
D7
D6
D5
D4
D3
D2
D1
D0
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