M16C65 Datasheet, PDF (542/829 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M16C/60

Under development
M16C/65 Group
Preliminary Specification
This is a preliminary specification and is subject to change.
23. Serial Interface UARTi (i = 0 to 2, 5 to 7)
23.2.13 UARTi Special Mode Register 4 (UiSMR4) (i = 0 to 2, 5 to 7)
UARTi Special Mode Register 4 (i = 0 to 2, 5 to 7)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
U0SMR4, U1SMR4, U2SMR4
U5SMR4, U6SMR4, U7SMR4
Address
0244h, 0254h, 0264h
0284h, 0294h, 02A4h
Bit Symbol
Bit Name
Function
STAREQ Start condition generate bit
0 : Clear
1 : Start
RSTAREQ
Restart condition generate
bit
0 : Clear
1 : Start
STPREQ Stop condition generate bit
0 : Clear
1 : Start
After Reset
00h
00h
RW
RW
RW
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 interface 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 low hold disabled
1 : SCL low hold enabled
RW
STAREQ (Start Condition Generate Bit) (b0)
The STAREQ bit becomes 0 when the start condition is generated.
RSTAREQ (Restart Condition Generate Bit) (b1)
The RSTAREQ bit becomes 0 when the restart condition is generated.
STPREQ (Stop Condition Generate Bit) (b2)
The STPREQ bit becomes 0 when the stop condition is generated.
REJ09B0484-0030 Rev.0.30 Sep 09, 2008
Page 507 of 791