M32C80 Datasheet, PDF (213/352 Pages) Renesas Technology Corp – 16/32-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M32C/80 SERIES

M32C/80 Group
16. Serial I/O (Special Function)
(1) When the IICM2 bit is set to "0" (ACK or NACK interrupt) and the CKPH bit is set to "0" (no clock delay)
1st 2nd
3rd
4th
5th
6th
7th
8th
9th
bit
bit
bit
bit
bit
bit
bit
bit
bit
SCLi
SDAi
D7 D6 D5 D4 D3 D2 D1 D0 D8 (ACK or NACK)
ACK interrupt (DMA
request) or NACK interrupt
b15
b9 b8 b7
b0
Data is transferred to the UiRB register
••• _{D8 D7 D6 D5 D4 D3 D2 D1 D0}
Contents of the UiRB register
(2) When the IICM2 bit is set to "0" and the CKPH bit is set to "1" (clock delay)
1st 2nd
3rd
4th
5th
6th
7th
8th
9th
bit
bit
bit
bit
bit
bit
bit
bit
bit
SCLi
SDAi
D7 D6 D5 D4 D3 D2 D1 D0 D8 (ACK or NACK)
ACK interrupt (DMA
request) or NACK interrupt
b15
b9 b8 b7
b0
Data is transferred to the UiRB register ^{•••} D8 D7 D6 D5 D4 D3 D2 D1 D0
Contents of the UiRB register
(3) When the IICM2 bit is set to "1" (UART transmit or receive interrupt) and the CKPH bit is set to "0"
1st 2nd
3rd
4th
5th
6th
7th 8th
9th
bit
bit
bit
bit
bit
bit
bit
bit
bit
SCLi
SDAi
D7 D6 D5 D4 D3 D2 D1 D0 D8 (ACK or NACK)
Receive interrupt Transmit interrupt
(DMA request)
b15
b9 b8 b7
b0
Data is transferred to the UiRB register
••• D0 D7 D6 D5 D4 D3 D2 D1
Contents of the UiRB register
(4) When the IICM2 bit is set to "1" and the CKPH bit is set to "1"
1st 2nd
3rd
4th
5th
6th
7th 8th
9th
bit
bit
bit
bit
bit
bit
bit
bit
bit
SCLi
SDAi
D7 D6 D5 D4 D3 D2 D1 D0 D8 (ACK or NACK)
Receive interrupt
(DMA request)
Transmit interrupt
i=0 to 4
IICM2: Bit in the UiSMR2 register
CKPH: Bit in the UiSMR3 regiser
Data is transferred to the UiRB register
b15
b9 b8 b7
b0
••• D0 D7 D6 D5 D4 D3 D2 D1
Contents of the UiRB register
Data is transferred to the UiRB register
b15
b9 b8 b7
b0
••• D8 D7 D6 D5 D4 D3 D2 D1 D0
Contents of the UiRB register
The above applies under the following condition:
• The CKDIR bit in the UiMR register is set to "1" (slave)
Figure 16.20 SCLi Timing
Rev. 1.00 Nov. 01, 2005 Page 194 of 330
REJ09B0271-0100