HD6412373R RENESAS [Renesas Technology Corp], HD6412373R Datasheet - Page 859

• Manufacturer Part Number: HD6412373R
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2300 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

(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.
The transmission procedure and operations in slave transmit mode are described below.
1. Set the ICE bit in ICCRA to 1. Set the MLS and WAIT bits in ICMR and the CKS3 to CKS0
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.
5. Clear TDRE.
(master output)
(slave output)
processing
bits in ICCRA to 1. (Initial setting) Set the MST and TRS bits in ICCRA 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 9th
clock pulse. At this time, if the 8th bit data (R/W) is 1, the TRS in ICCRA and TDRE in ICSR
are set to 1, and the mode changes to slave transmit mode automatically. The continuous
transmission is performed by clearing TDRE after writing transmit data to ICDRT every time
TDRE is set.
with TDRE = 1. When TEND is set, clear TEND.
ICDRR
SCL
SDA
SDA
ICDRS
RDRF
RCVD
User
Slave Transmit Operation
Data n-1
A
9
[5] Read ICDRR and clear RDRF
Figure 16.8 Master Receive Mode Operation Timing 2
Data n-1
after setting RCVD.
Bit 7
1
Bit 6
2
Bit 5
3
Bit 4
4
Bit 3
[7] Read ICDRR, clear RDRF,
5
and clear RCVD
Section 16 I
Bit 2
6
Rev.7.00 Mar. 18, 2009 page 791 of 1136
Bit 1
7
2
C Bus Interface 2 (IIC2) (Option)
Bit 0
Data n
8
A/A
9
Data n
[6] Issue stop
condition
REJ09B0109-0700
[8] Set slave
receive mode