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參數(shù)資料
| 型號： | M37221 |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
| 中文描述： | 單芯片8位CMOS微機電壓合成與屏幕顯示控制器 |
| 文件頁數(shù)： | 15/61頁 |
| 文件大?。?/td> | 1386K |
| 代理商： | M37221 |
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MITSUBISHI MICROCOMPUTERS
M37221M6-XXXSP
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
with ON-SCREEN DISPLAY CONTROLLER
15
SERIAL I/O
The M37221M6-XXXSP has a built-in serial I/O which can either trans-
mit or receive 8-bit data in serial in the clock synchronous mode.
The serial I/O block diagram is shown in Figure 8. The synchronizing
clock I/O pin (S
CLK
), and data I/O pins (S
OUT
, S
IN
) also function as
port P2.
Bit 2 of the serial I/O mode register (address 00DC
16
) selects whether
the synchronizing clock is supplied internally or externally (from the
P2
0
/S
CLK
pin). When an internal clock is selected, bits 1 and 0 select
whether f(X
IN
) is divided by 4, 16, 32, or 64. Bit 3 selects whether
port P2 is used for serial I/O or not. To use the P2
2
/S
IN
pin as the S
IN
pin, set the bit 2 of the port P2 direction register (address 00C5
16
) to
“0.”
The operation of the serial I/O function is described below. The func-
tion of the serial I/O differs depending on the clock source; external
clock or internal clock.
Fig. 8. Serial I/O block diagram
8
Serial I/O shift register (8)
Data bus
Serial I/O interrupt
request
Selection gate :
Connected to black
colored side at reset.
Synchronization circuit
Frequency
divider
1/4
1/8
1/16
SM
1
SM
0
Serial I/O counter (8)
SM
5
: LSB
MSB
S
SM
2
1/2
SM
6
X
IN
P2
2
/S
IN
P2
1
/S
OUT
P2
0
/S
CLK
1/2
SM
3
P2
1
latch
P2
0
latch
SM
3
(Address 00DD
16
)
(Note)
SM : Serial I/O mode register
Note :
When the data is set in the serial I/O register (address 00DD
16
), the register functions as the serial I/O shift register.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M37221EAFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
| M37221EASP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
| M37221EF | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
| M37221EFSP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
| M37221FP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
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