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參數(shù)資料
| 型號： | M37735EHLHP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 16-BIT, OTPROM, MICROCONTROLLER, PQFP80 |
| 封裝： | FINE PITCH, PLASTIC, QFP-80 |
| 文件頁數(shù)： | 28/63頁 |
| 文件大?。?/td> | 8367K |
| 代理商： | M37735EHLHP |
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OVERVIEW
1-8
7733 Group User’s Manual
1.3 Pin description
1.3.1 Examples of handling unused pins
The following are examples of handling unused pins.
These are, however, just examples. In actual use, make the necessary adaptations and properly evaluate
performance according to the user’s application.
(1) In single-chip mode
Table 1.3.4 Examples of handling unused pins in single-chip mode
Handling example
Connect these pins to pin Vcc or Vss via resistors after these
pins are set to the input mode, or leave these pins open after
they are set to the output mode (Note 1).
Leave this pin open.
Connect this pin to pin Vcc.
Connect these pins to pin Vss.
Notes 1: When leaving these pins open after they are set to the output mode, note the following: these pins
function as input ports from reset until they are switched to the output mode by software. Therefore,
voltage levels of these pins are undefined and the power source current may increase while these
pins function as input ports.
Software reliability can be enhanced when the contents of the above ports’ direction registers are
set periodically. This is because these contents may be changed by noise, a program runaway
which occurs owing to noise, etc.
For unused pins, use the shortest possible wiring (within 20 mm from the microcomputer’s pins).
2: This is applied when an external clock is input to pin XIN.
Pins
P0–P8
__
E
XOUT (Note 2)
AVcc
AVss, VREF, BYTE
P0–P8
AVss
VREF
BYTE
M37733MHBXXXFP
Vss
AVcc
E
XOUT
Left open
When setting ports to input mode
VCC
P0–P8
AVss
VREF
BYTE
M37733MHBXXXFP
Vss
AVcc
E
XOUT
Left open
When setting ports to output mode
Left open
Vcc
Fig. 1.3.1 Examples of handling unused pins in single-chip mode
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| M37754M6C-XXXHP | 16-BIT, MROM, 40 MHz, MICROCONTROLLER, PQFP100 |
| M37754M6C-XXXGP | 16-BIT, MROM, 40 MHz, MICROCONTROLLER, PQFP100 |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M37735EHLXXXHP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:PROM VERSION OF M37735MHLXXXHP |
| M37735M4B | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M37735M4BXXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M37735M4L | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
| M37735M4LXXXHP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER |
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