HD6417641 RENESAS [Renesas Technology Corp], HD6417641 Datasheet - Page 548
HD6417641
Manufacturer Part Number
HD6417641
Description
Manufacturer
RENESAS [Renesas Technology Corp]
Datasheet
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Section 16 I
Transmit Operation:
In transmit mode, transmit data is output from SDA, in synchronization with the fall of the transfer
clock. The transfer clock is output when MST in ICCR1 is 1, and is input when MST is 0. For
transmit mode operation timing, refer to figure 16.14. The transmission procedure and operations
in transmit mode are described below.
1. Set the ICE bit in ICCR1 to 1. Set the MST and CKS3 to CKS0 bits in ICCR1 to 1. (Initial
2. Set the TRS bit in ICCR1 to select the transmit mode. Then, TDRE in ICSR is set.
3. Confirm that TDRE has been set. Then, write the transmit data to ICDRT. The data is
Rev. 4.00 Sep. 14, 2005 Page 498 of 982
REJ09B0023-0400
processing
(Output)
ICDRT
ICDRS
TDRE
SDA
SCL
TRS
User
setting)
transferred from ICDRT to ICDRS, and TDRE is set automatically. The continuous
transmission is performed by writing data to ICDRT every time TDRE is set. When changing
from transmit mode to receive mode, clear TRS while TDRE is 1.
[2] Set TRS
2
C Bus Interface 2 (IIC2)
[3] Write data
to ICDRT
Data 1
Bit 0
Figure 16.14 Transmit Mode Operation Timing
1
[3] Write data
to ICDRT
Bit 1
2
Data 1
Bit 6
7
Data 2
Bit 7
8
Bit 0
Data 2
1
Bit 6
7
[3] Write data
Bit 7
to ICDRT
8
Data 3
[3] Write data
Data 3
Bit 0
to ICDRT
1
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