r4f2426 Renesas Electronics Corporation., r4f2426 Datasheet - Page 962
r4f2426
Manufacturer Part Number
r4f2426
Description
16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.R4F2426.pdf
(1302 pages)
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Section 16 I
Rev. 1.00 Sep. 19, 2008 Page 934 of 1270
REJ09B0466-0100
Bit
4
3
2
Bit Name
NACKF
STOP
AL
2
C Bus Interface 2 (IIC2)
0
Initial Value
0
0
R/W
R/W
R/W
R/W
Description
No Acknowledge Detection Flag
[Setting condition]
•
[Clearing condition]
•
Stop Condition Detection Flag
[Setting condition]
•
•
[Clearing condition]
•
Arbitration Lost Flag
This flag indicates that arbitration was lost in master
mode.
When two or more master devices attempt to seize
the bus at nearly the same time, if the I
interface detects data differing from the data it sent,
it sets AL to 1 to indicate that the bus has been taken
by another master.
[Setting conditions]
•
•
[Clearing condition]
•
When no acknowledge is detected from the
receive device in transmission while the ACKE bit
in ICIER is 1.
When 0 is written in NACKF after reading NACKF
= 1.
In master mode, when a stop condition is
detected after frame transfer.
In slave mode, when a stop condition is detected
after the general call address or the first byte
slave address, next to detection of start condition,
accords with the address set in SAR.
When 0 is written in STOP after reading STOP =
1.
If the internal SDA and SDA pin disagree at the
rise of SCL in master transmit mode.
When the SDA pin outputs high in master mode
while a start condition is detected.
When 0 is written in AL after reading AL =1.
2
C bus
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