M16C6S_09 Datasheet, PDF (100/208 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

M16C/6S Group
Serial I/O
UARTi special mode register 4 (i=0 to 2)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
Address
After reset
U0SMR4 to U2SMR4 036C16, 037016, 037416
0016
Bit
symbol
Bit name
Function
RW
STAREQ Start condition
0 : Clear
RW
generate bit (Note)
1 : Start
RSTAREQ ^{Restart condition}
generate bit (Note)
0 : Clear
1 : Start
RW
STPREQ ^{Stop condition}
generate bit (Note)
0 : Clear
1 : Start
RW
STSPSEL _{SCL,SDA output}
select bit
0 : Start and stop conditions not output
1 : Start and stop conditions output
RW
ACKD ACK data bit
0 : ACK
1 : NACK
RW
ACKC ^{ACK data output}
enable bit
0 : Serial I/O data output
1 : ACK data output
RW
SCLHI ^{SCL output stop}
enable bit
0 : Disabled
1 : Enabled
RW
SWC9 ^{SCL wait bit 3}
0 : SCL “L” hold disabled
1 : SCL “L” hold enabled
RW
Note: Set to “0” when each condition is generated.
Figure 1.13.8. U0SMR4 to U2SMR4 Registers
Rev.5.01 Dec 10, 2009 page 100 of 201
REJ03B0014-0501