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2
Section 18 I
C Bus Interface (IIC)
Bit
Bit Name
5
ICDRF
Rev. 1.00 Mar. 12, 2008 Page 612 of 1178
REJ09B0403-0100
Initial
Value
R/W
Description
0
R
Receive Data Read Request Flag
Indicates the ICDR (ICDRR) status in receive mode.
0: Indicates that the data has been already read from
ICDR (ICDRR) or ICDR is initialized.
1: Indicates that data has been received successfully and
transferred from ICDRS to ICDRR, and the data is
ready to be read out.
[Setting conditions]
•
(1) When data is received successfully while ICDRF = 0
(2) When ICDR is read successfully in receive mode after
[Clearing conditions]
•
•
When ICDRF is set due to the condition (2) above, ICDRF
is temporarily cleared to 0 when ICDR (ICDRR) is read;
however, since data is transferred from ICDRS to ICDRR
immediately, ICDRF is set to 1 again.
Note that ICDR cannot be read successfully in transmit
mode (TRS = 1) because data is not transferred from
ICDRS to ICDRR. Be sure to read data from ICDR in
receive mode (TRS = 0).
When data is received successfully and transferred
from ICDRS to ICDRR.
(at the rise of the 9th clock pulse).
data was received while ICDRF = 1.
When ICDR (ICDRR) is read.
When 0 is written to the ICE bit.
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