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參數(shù)資料
| 型號： | M37274MA |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | Single Chip 8 Bits Microcomputer(8位單片機) |
| 中文描述： | 單芯片8位單片機（8位單片機） |
| 文件頁數(shù)： | 23/131頁 |
| 文件大小： | 2049K |
| 代理商： | M37274MA |
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23
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
M37274MA-XXXSP
PRELIMINARY
Notice: This is not a final specification.
Some paramentic limits are subject to change.
MITSUBISHI MICROCOMPUTERS
SERIAL I/O
The M37274MA-XXXSP has a built-in serial I/O which can either trans-
mit or receive 8-bit data serially in the clock synchronous mode.
The serial I/O block diagram is shown in Figure 14. The synchronous
clock I/O pin (S
CLK
), and data output pin (S
OUT
) also function as port
P4, data input pin (S
IN
) also functions as port P1.
Bit 2 of the serial I/O mode register (address 0213
16
) selects whether
the synchronous clock is supplied internally or externally (from the
P4
6
/S
CLK
pin). When an internal clock is selected, bits 1 and 0 select
whether f(X
IN
) or f(X
CIN
) is divided by 8, 16, 32, or 64. To use S
OUT
and P4
6
/S
CLK
pins for serial I/O, set the corresponding bits of the
port P4 direction register (address 00C9
16
) to “0.” To use S
IN
pin for
serial I/O, set the corresponding bit of the port P1 direction register
(address 00C3
16
) to “0.”
Fig. 14. Serial I/O Block Diagram
The operation of the serial I/O is described below. The operation of
the serial I/O differs depending on the clock source; external clock or
internal clock.
8
Serial I/O shift register (8)
Data bus
Serial I/O
interrupt request
Selection gate: Connect to
black side at
reset.
Synchronous
circuit
Frequency divider
1/8
1/4
1/16
SM1
SM0
Serial I/O counter (8)
SM5
: LSB
MSB
S
SM2
1/2
X
IN
S
IN
S
OUT
S
CLK
1/2
(Address 0214
16
)
X
CIN
1/2
CM7
1/2
Note :
When the data is set in the serial I/O register (address 0214
16
), the register functions as the serial I/O shift register.
(Note)
CM : CPU mode register
SM : Serial I/O mode register
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| M37274MA-052SP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER |
| M37274MA-053SP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER |
| M37274MA-082SP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER |
| M37274MA-084SP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER |
| M37274MA-XXXSP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER |
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