r4f2456 Renesas Electronics Corporation., r4f2456 Datasheet - Page 1027

• Manufacturer Part Number: r4f2456
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

17.3.6
SAR is an 8-bit readable/writable register that sets slave address. When the chip is in slave mode,
if the upper 7 bits of SAR match the upper 7 bits of the first frame received after a start condition,
the chip operates as the slave device.
Bit
1
0
Bit
7 to 1
0
Bit Name
AAS
ADZ
Slave Address Register (SAR)
Bit Name
SVA6 to
SVA0

Initial Value
0
0
Initial Value
All 0
0
R/W
R/W
R/W
R/W
R/W
R/W
Description
Slave Address Recognition Flag
In slave receive mode, this flag is set to 1 if the first
frame following a start condition matches bits SVA6
to SVA0 in SAR.
[Setting condition]
•
•
[Clearing condition]
•
General Call Address Recognition Flag
This bit is valid in slave receive mode.
[Setting condition]
•
[Clearing conditions]
•
Description
Slave Address 6 to 0
These bits set a unique address in bits SVA6 to
SVA0, differing from the addresses of other slave
devices connected to the I
Reserved
This bit is readable/writable. The write value
should always be 0.
receive mode.
slave receive mode.
slave receive mode.
When the slave address is detected in slave
When the general call address is detected in
When 0 is written in AAS after reading AAS=1
When the general call address is detected in
When 0 is written in ADZ after reading ADZ=1.
Rev. 1.00 Sep. 19, 2008 Page 997 of 1342
Section 17 I
2
C bus.
2
C Bus Interface 2 (IIC2)
REJ09B0467-0100