h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 950

• Manufacturer Part Number: h8s-2138
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2100 Series
• Manufacturer: Renesas Electronics Corporation.

Appendix B Internal I/O Registers
DDCSWR—DDC Switch Register
Rev. 4.00 Jun 06, 2006 page 896 of 1004
REJ09B0301-0400
Notes: 1. Only 0 can be written, to clear the flag.
Bit
Initial value
Read/Write
2. Always read as 1.
DDC mode switch enable
0
1
SWE
R/W
7
0
Automatic switching of IIC channel 0 from formatless mode
to I
Automatic switching of IIC channel 0 from formatless mode
to I
2
2
DDC mode switch
C bus format is disabled
C bus format is enabled
0
1
R/W
IIC channel 0 is used with the I
[Clearing conditions]
• When 0 is written by software
• When a falling edge is detected on the SCL pin when SWE = 1
IIC channel 0 is used in formatless mode
[Setting condition]
When 1 is written in SW after reading SW = 0
SW
6
0
DDC mode switch interrupt enable bit
0
1
Interrupt when automatic format switching is executed
is disabled
Interrupt when automatic format switching is executed
is enabled
DDC mode switch interrupt flag
R/W
0
1
IE
5
0
No interrupt is requested when automatic
format switching is executed
[Clearing condition]
When 0 is written in IF after reading IF = 1
An interrupt is requested when automatic
format switching is executed
[Setting condition]
When a falling edge is detected on the SCL
pin when SWE = 1
IIC clear bits
CLR3
Bit 3
0
1
R/(W) *
CLR2
IF
Bit 2
4
0
—
0
1
1
CLR1
Bit 1
—
—
0
1
CLR3
W *
2
3
1
C bus format
CLR0
Bit 0
—
—
2
0
1
0
1
Setting prohibited
Setting prohibited
IIC0 internal latch cleared
IIC1 internal latch cleared
IIC0 and IIC1 internal latches cleared
Invalid setting
H'FEE6
CLR2
W *
2
1
2
CLR1
Description
W *
1
1
2
CLR0
W *
0
1
2
IIC0