M37754 Mitsubishi, M37754 Datasheet - Page 52
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M37754
Manufacturer Part Number
M37754
Description
SINGLE-CHIP 16BIT CMOS MICROCOMPUTER
Manufacturer
Mitsubishi
Datasheet
1.M37754.pdf
(114 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
M37754S4CGP
Manufacturer:
RENESAS/瑞萨
Quantity:
20 000
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Selection of transfer format
In clock synchronous serial communication, transfer format can be
selected by bit 7 of the Transmit/Receive control register 0. When bit
7 is “0”, transfer format is LSB first. When bit 7 is “1”, transfer format
is MSB first.
This function is realized by changing connection relation between the
Fig. 64 Connection relation between transmit buffer register, receive buffer register, and data bus
52
Bit 7 in Transmit/Receive
control register 0
(MSB first)
(LSB first)
0
1
Data bus
Data bus
M37754M8C-XXXGP, M37754M8C-XXXHP
DB
DB
DB
DB
DB
DB
DB
DB
DB
DB
DB
DB
DB
DB
DB
DB
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
Write to transmit
buffer register
Transmit buffer
Transmit buffer
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
transmit buffer register and the receive buffer register when writing
transmit data to the transmit buffer register or reading receive data
from the receive buffer register. Accordingly, the transmitter’s opera-
tion is the same in both transfer formats.
Figure 64 shows the connection relation.
register
7
6
5
4
3
2
1
0
register
7
6
5
4
3
2
1
0
M37754S4CGP, M37754S4CHP
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Data bus
Data bus
DB
DB
DB
DB
DB
DB
DB
DB
DB
DB
DB
DB
DB
DB
DB
DB
Read from receive
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
buffer register
MITSUBISHI MICROCOMPUTERS
Receive buffer
Receive buffer
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
D
register
7
6
5
4
3
2
1
0
register
7
6
5
4
3
2
1
0
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