h8s-2635 Renesas Electronics Corporation., h8s-2635 Datasheet - Page 1474

• Manufacturer Part Number: h8s-2635
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Appendix B Internal I/O Register
ICCR0—I
ICCR1—I
Rev. 6.00 Feb 22, 2005 page 1414 of 1484
REJ09B0103-0600
Bit
Initial value
R/W
2
2
C Bus Control Register
C Bus Control Register
:
:
:
Notes: This register is valid only on the H8S/2638, H8S/2639, or H8S/2630 with the I
I
2
C Bus Interface Enable
0 I
1 I
R/W
ICE
7
0
I
the bus)
ICMR and ICDR can be accessed
2
2
2
C bus interface module disabled, with SCL and SDA signal pins set to port function
C bus interface module internal states initialized SAR and SARX can be accessed
C bus interface module enabled for transfer operations (pins SCL and SCA are driving
* Only 0 can be written, for flag clearing.
interface option added.
I
2
C Bus Interface Interrupt Enable
0 Interrupts disabled
1 Interrupts enabled
IEIC
R/W
6
0
MST
R/W
5
0
Note: * For details see section 15.2.5, I
Master/slave select, transmit/receive select
0
1
TRS
R/W
Control Register.
4
0
Acknowledge bit judgement selection
0 The value of the acknowledge bit is ignored, and
1 If the acknowledge bit is 1, continuous transfer is
0
1
0
1
continuous transfer is performed
interrupted
ACKE
R/W
Bus busy
Slave receive mode
Slave transmit mode
Master receive mode
Master transmit mode
0 Bus is free
1 Bus is free
3
0
[Clearing condition]
• When a stop condition is detected
[Clearing condition]
• When a stop condition is detected
Note: * For details see section 15.2.5, I
I
H'FF78
H'FF80
2
C Bus interface interrupt request flag
0 Waiting for transfer, or transfer in progress
1 Interrupt requested
Start condition/stop condition prohibit
BBSY
0 Writing 0 issues a start or stop condition,
1 Reading always returns a value of 1
R/W
2
0
Control Register.
in combination with the BBSY flag
Writing is ignored
2
C Bus
R/(W)*
IRIC
1
0
2
C bus
SCP
R/W
0
0
2
C Bus
IIC0
IIC1