M16C30P_07 Datasheet, PDF (145/317 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/30 SERIES

M16C/30P Group
15. Serial Interface
UARTi Special Mode Register 4 (i=0 to 2)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
Address
After Reset
U0SMR4 to U2SMR4
036Ch, 0370h, 0374h
00h
Bit Symbol
Bit Name
Function
RW
Start Condition Generate Bit ⁽¹⁾
0 : Clear
STAREQ
1 : Start
RW
Restart Condition Generate Bit ⁽¹⁾
0 : Clear
RSTAREQ
1 : Start
RW
Stop Condition Generate Bit ⁽¹⁾
0 : Clear
STPREQ
1 : Start
RW
SCL,SDA Output Select Bit
STSPSEL
0 : Start and stop conditions not output
1 : Start and stop conditions output
RW
ACK Data Bit
0 : ACK
ACKD
1 : NACK
RW
ACK Data Output Enable Bit
0 : Serial interface data output
ACKC
1 : ACK data output
RW
SCL Output Stop Enable Bit
0 : Disabled
SCLHI
1 : Enabled
RW
SCL Wait Bit 3
SWC9
0 : SCL “L” hold disabled
1 : SCL “L” hold enabled
RW
NOTES :
1. Set to “0” w hen each condition is generated.
Figure 15.11 UiSMR4 Register
Rev.1.22 Mar 29, 2007 Page 129 of 291
REJ09B0179-0122