HD6417641 RENESAS [Renesas Technology Corp], HD6417641 Datasheet - Page 543
HD6417641
Manufacturer Part Number
HD6417641
Description
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
1.HD6417641.pdf
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(Master output)
16.4.4
In slave transmit mode, the slave device outputs the transmit data, while the master device outputs
the receive clock and returns an acknowledge signal. For slave transmit mode operation timing,
refer to figures 16.9 and 16.10.
The transmission procedure and operations in slave transmit mode are described below.
1. Set the ICE bit in ICCR1 to 1. Set bits CKS3 to CKS0 in ICCR1 to 1. (Initial setting) Set the
2. When the slave address matches in the first frame following detection of the start condition,
3. If TDRE is set after writing last transmit data to ICDRT, wait until TEND in ICSR is set to 1,
4. Clear TRS for the end processing, and read ICDRR (dummy read). SCL is free.
(Master output)
(Slave output)
processing
MST and TRS bits in ICCR1 to select slave receive mode, and wait until the slave address
matches.
the slave device outputs the level specified by ACKBT in ICIER to SDA, at the rise of the
ninth clock pulse. At this time, if the eighth bit data (R/W) is 1, the TRS and ICSR bits in
ICCR1 are set to 1, and the mode changes to slave transmit mode automatically. The
continuous transmission is performed by writing transmit data to ICDRT every time TDRE is
set.
with TDRE = 1. When TEND is set, clear TEND.
SCL
ICDRS
ICDRR
SDA
SDA
RDRF
RCVD
User
Slave Transmit Operation
Data n-1
A
[5] Read ICDRR after setting RCVD
Figure 16.8 Master Receive Mode Operation Timing (2)
9
Data n-1
Bit 7
1
Bit 6
2
Bit 5
3
Bit 4
4
Bit 3
5
Bit 2
[7] Read ICDRR,
6
and clear RCVD
Rev. 4.00 Sep. 14, 2005 Page 493 of 982
Bit 1
7
Section 16 I
Bit 0
Data n
8
A/A
9
Data n
[6] Issue stop
2
condition
C Bus Interface 2 (IIC2)
REJ09B0023-0400
[8] Set slave
receive mode
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