M16C26 Datasheet, PDF (148/239 Pages) Renesas Technology Corp – 16-BIT CMOS SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/20 SERIES

Udenvdeelropment
Preliminary Specifications Rev.
Specifications in this manual are
UART2 Special Mode Register
0.9
tentative
and
subject to change.
SINGLE-CHIP 16-BIT
M16C/26 Group
CMOS MICROCOMPUTER
TxD2/SDA2
RxD2/SCL2
CLK2
Timer
I/O
Selector
UARTi
IICM=1
Analog
delay
IICM=0
SDHI
ALS
UART2
Transmission
register
IICM=0
or IICM2=1
IICM=1
and IICM2=0
UART2 transmission/NACK
interrupt request
Noize
Filter
Noize
Filter
Noize
Filter
DQ
Arbitration
T
Timer
IICM=1
Reception register
IICM=0
or IICM2=1
UART2 reception/ACK interrupt
request, DMA1 request
IICM=0
Start condition
UART2
IICM=1
and IICM2=0
detection
Stop condition
S
Q
R
Bus busy
detection
Falling edge
detection
L-synchronous
output enabling
bit
NACK
DQ
T
Selector
I/O
R
Q
Data bus
(Port P71 output data latch)
UARTi
Internal clock
DQ
T
ACK
9th pulse
IICM=1
Bus collision/start, stop condition
detection interrupt request
IICM=1
IICM=1
SWC2
CLK
control
Bus collision
detection
External clock
UARTi
IICM=0
IICM=0
Falling edge of 9 bit
SWC
UART2
IICM=0
Selector
I/O
Timer
Port reading
* With IICM set to 1, the port terminal is to be readable
even if 1 is assigned to P71 of the direction register.
To DMA0, DMA1
To DMA0, DMA1
Figure 1.15.28. Functional block diagram for I²C mode
Figure 1.15.28 shows the functional block diagram for I²C mode.
142
Renesas Technology Corp.