M32C8A Datasheet, PDF (242/372 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M32C/80 Series

M32C/8A Group
17. Serial Interfaces
(note 1)
NCH
SDAi
Noise
filter
Select SDA output
in Function Control
Register
Transmission
control circuit
Reception
control circuit
Start condition detection
Stop condition detection
ABT
DQ
T
UARTi transmit
shift register
UARTi transmit
shift register
BBS
SQ
R
ALS
SDHI
0 ^ACKC
STSPSEL
0
1
1
Delay circuit
ACKD
IICM2 = 1
IICM = 1 and
IICM2 = 0
DMA 0 to 3 request
UARTi transmit interrupt request
NACK interrupt request
IICM = 0 or
IICM2 = 1
IICM = 1 and
IICM2 = 0
NACK
DQ
T
DMA 0 to 3 request
UARTi receive interrupt request
ACK interrupt request
Start/stop condition detection
interrupt request
(note 1)
NCH
Logic 1 write
Logic 0 write ^{signal to PDk_m}
signal to PDk_m
SQ
Falling edge
detection
R
DQ
ACK
T
Start/stop condition
generation block
SCLi
Noise
filter
i = 0 to 4
Select SCL output in
Function Control
Register
UARTi
CLK
control
9th clock
SWC
Falling edge
of 9th bit
IICM, BBS: bits in the UiSMR register
IICM2, SWC, ALS, SWC2, SDHI: bits in the UiSMR2 register
STSPSEL, ACKD, ACKC: bits in the UiSMR4 register
NCH: bit in the UiC0 register
ABT: UiRB register
PDk_m: bit in the Port Pk Direction Register corresponding to the SCLi pin
NOTE:
1. P7_0 and P7_1 do not have the dotted rectangular portion of the circuit.
SWC2
SQ
R
STSPSEL ^IICM
0
0
1
1
Figure 17.23 I²C Mode Block Diagram
Rev.1.00 Jul 15, 2007 Page 225 of 352
REJ09B0385-0100