M16C6K9 Datasheet, PDF (198/292 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

M16C/6K9 Group
MULTI-MASTER I²C-BUS Interface
I²C start/stop condition control register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
S2Di(i=0,1,2)
Address
032516,033516,031516
When reset
000110102
Bit Symbol
Bit name
Function
RW
SSC0
SSC1
SSC2
START/STOP condition setting The setting of the detecting
bits
condition of START/STOP
condition.Refer to Table GC-8.
Note: Prohibit the setting of
"000002" and odd value
SSC3
SSC4
SIP
SCL/SDA interrupt pin polarity
selection bit
0 : Active in falling edge
1 : Active in rising edge
SIS
SCL/SDA interrupt pin selection 0 : SDA enable
bit
1 : SCL enable
STSP
SEL
START/STOP condition
generation selection bit
0 : Setup/hold time short mode
1 : Setup/hold time long mode
Fig.GC-14 I²C start/stop condition control register
Table.GC-8 Recommended setting value (SSC4 - SSC0) start/stop condition at each oscillation frequency
Oscillation I²C system I²C system SSC4-SSC0 SCL release Setup time Hold time
f(XIN) (MHz) clock selection clock(MHz)
time(cycle)
(cycle)
(cycle)
10
1 / 2f1
5
XXX11110
6.2µs (31) 3.2µs (16) 3.0µs (15)
8
1 / 2f1
4
XXX11010
6.75µs(27) 3.5µs (14) 3.25µs(13)
XXX11000
6.25µs(25) 3.25µs(13) 3.0µs (12)
8
1 / 8f1
1
XXX00100
5.0µs (5)
3.0µs (3)
2.0µs (2)
4
1 / 2f1
2
XXX01100
6.5µs (13) 3.5µs (7)
3.0µs (6)
XXX01010
5.5µs (11)
3.0µs (6)
2.5µs (5)
2
1 / 2f1
1
XXX00100
5.0µs (5)
3.0µs (3)
2.0µs (2)
Note: Do not set odd value or “000002” to START/STOP condition setting bits.
Rev.1.00 Jun 06, 2003 page 198 of 290