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參數(shù)資料
| 型號： | M37531RSS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, 8 MHz, MICROCONTROLLER, CDIP42 |
| 封裝： | SHRINK, CERAMIC, PIGGY BACK, DIP-42 |
| 文件頁數(shù)： | 17/76頁 |
| 文件大小： | 1022K |
| 代理商： | M37531RSS |
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SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
7531 Group
MITSUBISHI MICROCOMPUTERS
24
qSerial I/O2
The serial I/O2 function can be used only for clock synchronous se-
rial I/O.
For clock synchronous serial I/O2 the transmitter and the receiver
must use the same clock. When the internal clock is used, transfer is
started by a write signal to the serial I/O2 register.
[Serial I/O2 control register] SIO2CON
The serial I/O2 control register contains 8 bits which control various
serial I/O functions.
Set “0” to bit 3 to receive.
At reception, clear bit 7 to “0” by writing a dummy data to the serial I/
O2 register after completion of shift.
Bit 7 is set to “1” a half cycle (of the shift clock) earlier than comple-
tion of shift operation. Accordingly, when using this bit to confirm
shift completion, a half cycle or more of the shift clock must pass
after confirming that this bit is set to “1”, before performing read/
write to the serial I/O2 register.
Fig. 27 Structure of serial I/O2 control registers
Fig. 28 Block diagram of serial I/O2
“1”
“0”
“1”
“0”
“1”
1/8
1/16
1/32
1/64
1/128
1/256
XIN
Data bus
Serial I/O2
interrupt request
SDATA pin selection bit
Serial I/O counter 2 (3)
Serial I/O shift register 2 (8)
SCLK pin selection bit
Internal synchronous
clock selection bits
Divider
P12/SCLK
P13/SDATA
P12 latch
SCLK pin
selection bit
SCLK
P13 latch
SDATA pin selection bit
Internal synchronous clock selection bits
000 : f(XIN)/8
001 : f(XIN)/16
010 : f(XIN)/32
011 : f(XIN)/64
110 : f(XIN)/128
111 : f(XIN)/256
b7
b0
Not used
(returns “0” when read)
Transfer direction selection bit
0 : LSB first
1 : MSB first
SCLK pin selection bit
0 : External clock (SCLK is an input)
1 : Internal clock (SCLK is an output)
Transmit / receive shift completion flag
0 : shift in progress
1 : shift completed
Note : When using it as a SDATA input, set the port P13
direction register to “0”.
Serial I/O2 control register
(SIO2CON: address 003016, initial value: 0016)
SDATA pin selection bit (Note)
0 : I/O port / SDATA input
1 : SDATA output
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相關代理商/技術參數(shù) |
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| M37532M4-XXXFP | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-Bit Microcontroller |
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