M16C6K9 Datasheet, PDF (172/292 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

M16C/6K9 Group
Serial Interrupt Output
q Serial interrupt control register1 SERCON1
The register is for setting the pins of serial interrupt.
•Reset selection bit RSEL
__________
0: The input of PRST is the reset signal.
______________
1: The input of LRESET is the reset signal. (Note1)
__________
Note 1: The PRST pin becomes I/O port if setting the bit to “1”.
Serial interrupt control register 1
b7 b6 b5 b4 b3 b2 b1 b0
00
00
Symbol
SERCON1
Bit symbol
Reserved bit
Address
02B116
Bit name
RSEL
Reset selection bit
Reserved bit
OBF0MRG _{OBF0 mergence bit}
OBF0CLR _{OBF0 cut sync bit}
Reserved bit
Nothing is assigned.
Meaningless in writing. “0” in reading.
When reset
0016
Function
Must be “0”.
RW
0 : Select PRST pin.
1 : Select LRESET pin.
Must be “0”.
0 : OBF00 and OBF01 are
independent.
1 : OBF00 and OBF01 are merged
(logical OR).
0: Normal operation
1: SEN00, SEN01 is cleared
when OBF0 is cleared.
Must be “0”.
Fig.SI-5 Configuration of serial interrupt control register1
Rev.1.00 Jun 06, 2003 page 172 of 290