h8s-2138 Renesas Electronics Corporation., h8s-2138 Datasheet - Page 537

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

Bit 4—DDC Mode Switch Interrupt Flag (IF): Flag that indicates an interrupt request to the
CPU when automatic format switching is executed for IIC channel 0.
Bits 3 to 0—IIC Clear 3 to 0 (CLR3 to CLR0): These bits control initialization of the internal
state of IIC0 and IIC1.
These bits can only be written to; if read they will always return a value of 1.
When a write operation is performed on these bits, a clear signal is generated for the internal latch
circuit of the corresponding module(s), and the internal state of the IIC module(s) is initialized.
The write data for these bits is not retained. To perform IIC clearance, bits CLR3 to CLR0 must be
written to simultaneously using an MOV instruction. Do not use a bit manipulation instruction
such as BCLR.
When clearing is required again, all the bits must be written to in accordance with the setting.
Bit 4
IF
0
1
Bit 3
CLR3
0
1
Description
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
Bit 2
CLR2
0
1
—
Bit 1
CLR1
—
0
1
—
Bit 0
CLR0
—
0
1
0
1
—
Section 16 I
Description
Setting prohibited
Setting prohibited
IIC0 internal latch cleared
IIC1 internal latch cleared
IIC0 and IIC1 internal latches cleared
Invalid setting
Rev. 4.00 Jun 06, 2006 page 483 of 1004
2
C Bus Interface [H8S/2138 Group Option]
REJ09B0301-0400
(Initial value)