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H8SX/1663 Folha de dados(PDF) 884 Page - Renesas Technology Corp

Nome de Peças H8SX/1663
Descrição Electrónicos  Renesas 32-Bit CISC Microcomputer H8SX Family / H8SX/1600 Series
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Fabricante Electrônico  RENESAS [Renesas Technology Corp]
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Section 17 I
2C Bus Interface 2 (IIC2)
Rev.1.00 Jun. 07, 2006 Page 832 of 1102
REJ09B0294-0100
17.3.7
I
2C Bus Transmit Data Register (ICDRT)
ICDRT is an 8-bit readable/writable register that stores the transmit data. When ICDRT detects a
space in the I
2C bus shift register, it transfers the transmit data which has been written to ICDRT
to ICDRS and starts transmitting data. If the next data is written to ICDRT during transmitting
data to ICDRS, continuous transmission is possible.
Bit
Bit Name
Initial Value
R/W
7
0
R/W
6
0
R/W
5
0
R/W
4
0
R/W
3
0
R/W
2
0
R/W
1
0
R/W
0
0
R/W
17.3.8
I
2C Bus Receive Data Register (ICDRR)
ICDRR is an 8-bit read-only register that stores the receive data. When one byte of data has been
received, ICDRR transfers the receive data from ICDRS to ICDRR and the next data can be
received. ICDRR is a receive-only register; therefore, this register cannot be written to by the
CPU.
Bit
Bit Name
Initial Value
R/W
7
0
R
6
0
R
5
0
R
4
0
R
3
0
R
2
0
R
1
0
R
0
0
R
17.3.9
I
2C Bus Shift Register (ICDRS)
ICDRS is an 8-bit write-only register that is used to transmit/receive data. In transmission, data is
transferred from ICDRT to ICDRS and the data is sent from the SDA pin. In reception, data is
transferred from ICDRS to ICDRR after one by of data is received. This register cannot be read
from the CPU.
Bit
Bit Name
Initial Value
R/W
7
0
W
6
0
W
5
0
W
4
0
W
3
0
W
2
0
W
1
0
W
0
0
W



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