參數資料
型號: M30240S8
廠商: Mitsubishi Electric Corporation
英文描述: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
中文描述: 單片16位CMOS微機
文件頁數: 95/142頁
文件大小: 1637K
代理商: M30240S8
1-95
Mitsubishi microcomputers
M30240 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Preliminary Specifications REV. E
Specifications in this manual are tentative and subject to change
UART0 through UART2
2.23.1.1 Polarity select function
As shown in Figure 1.84, the CLK polarity select bit (bit 6 at addresses 03A4
16
, 03AC
16
, 037C
16
) allows se-
lection of the polarity of the transfer clock.
Figure 1.84: Polarity of transfer clock
2.23.1.2 LSB first/MSB first select function
As shown in Figure 1.85, when the transfer format select bit (bit 7 at addresses 03A4
16
, 03AC
16
, 037C
16
) =
“0”, the transfer format is “LSB first”; when the bit = “1”, the transfer format is “MSB first”.
Figure 1.85: Transfer format
When CLK polarity select bit = “1”
Note 2: The CLK pin level when not
transferring data is “L”.
D
1
D
2
D
3
D
4
D
5
D
6
D
7
D
1
D
2
D
3
D
4
D
5
D
6
D
7
D
0
D
0
T
X
D
i
R
X
D
i
CLK
i
When CLK polarity select bit = “0”
Note 1: The CLK pin level when not
transferring data is “H”.
D
1
D
2
D
3
D
4
D
5
D
6
D
7
D0
D
1
D
2
D
3
D
4
D
5
D
6
D
7
D
0
T
X
D
i
R
X
D
i
CLK
i
LSB first
When transfer format select bit = “0”
D0
D
0
D
1
D
2
D
3
D
4
D
5
D
6
D
7
D
1
D
2
D
3
D
4
D
5
D
6
D
7
T
X
D
i
R
X
D
i
CLK
i
When transfer format select bit = “1”
D
6
D
5
D
4
D
3
D
2
D
1
D
0
D
7
D
7
D
6
D
5
D
4
D
3
D
2
D
1
D
0
T
X
D
i
R
X
D
i
CLK
i
MSB first
Note: This applies when the CLK polarity select bit = “0”.
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