M16C6K9 Datasheet, PDF (194/292 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

M16C/6K9 Group
MULTI-MASTER I²C-BUS Interface
I²C control register 1
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
S3Di(i=0,1,2)
Address
032616,033616,031616
When reset
001100002
Bit Symbol
Bit name
SIM
The interrupt enable bit of
STOP condition detection
Function
0 : Disable the interrupt of STOP
condition detection
1 : Enable the interrupt of STOP
condition detection
RW
WIT
The interrupt enable bit of 0 : Disable
at the completion of data ^{1 : Enable}
reception
When in NACK setting
(ACK bit = "0") please write "0"
PED
SDAi/Port function switching 0 : SDA I/O pin(enable ES0 = 1)
bit
1 : GPIO(enable ES0 = 1)
PEC
SCLi/Port function switching 0 : SCL I/O pin(enable ES0 = 1)
bit
1 : GPIO(enable ES0 = 1)
SDAM
SCLM
ICK0
ICK1
The logic value monitor
bit of SDA output
0 : SDA output logic value = "0"
1 : SDA output logic value = "1"
The logic value monitor
bit of SCL output
I²C system clock selection
bits
0 : SCL output logic value = "0"
1 : SCL output logic value = "1"
b7 b6
0 0 : VIIC=1/2f1
0 1 : VIIC=1/4f1 ✼ f1=f(XIN)
1 0 : VIIC=1/8f1
1 1 : VIIC=1/2ICCK
✼ ICCK=External I²C clock
Fig.GC-11 I²C control register 1
Rev.1.00 Jun 06, 2003 page 194 of 290