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參數(shù)資料
| 型號(hào)： | M34501E4FP |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 4-BIT, OTPROM, 4.4 MHz, MICROCONTROLLER, PDSO20 |
| 封裝： | 0.300 INCH, PLASTIC, SOP-20 |
| 文件頁(yè)數(shù)： | 63/213頁(yè) |
| 文件大小： | 3014K |
| 代理商： | M34501E4FP |
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APPLICATION
2.4 A-D converter
2-37
4501 Group User’s Manual
(4)
A-D converter is used at the comparator mode
The analog input voltage is higher than the comparison voltage as a result of comparison, the
contents of ADF flag retains “0,” not set to “1.”
In this case, the A-D interrupt does not occur even when the usage of the A-D interrupt is enabled.
Accordingly, consider the time until the comparator operation is completed, and examine the state
of ADF flag by software. The comparator operation is completed after 8 machine cycles.
(5)
Analog input pins
Even when P20/AIN0 and P21/AIN1 are set to pins for analog input, they continue to function as P2
I/O. Accordingly, when any of them are used as these ports and others are used as analog input pins,
make sure to set the outputs of pins that are set for analog input to “1.” Also, the port input function
of the pin functions as an analog input is undefined.
(6)
TALA instruction
When the TALA instruction is executed, the low-order 2 bits of register AD is transferred to the high-
order 2 bits of register A, and simultaneously, the low-order 2 bits of register A is “0.”
(7)
Recommended operating conditions when using A-D converter
The recommended operating conditions of supply voltage and system clock frequency when using A-
D converter are different from those when not using A-D converter.
Table 2.4.2 shows the recommended operating conditions when using A-D converter.
Table 2.4.2 Recommended operating conditions (when using A-D converter)
Parameter
System clock frequency
(at ceramic resonance or
RC oscillation) (Note 2)
System clock frequency
(ceramic
resonance
selected, at external
clock input)
Condition
VDD = VRST to 5.5 V (high-speed mode)
VDD = VRST to 5.5 V (middle-speed mode)
VDD = VRST to 5.5 V (low-speed mode)
VDD = VRST to 5.5 V (default mode)
VDD = VRST to 5.5 V (high-speed mode)
VDD = VRST to 5.5 V (middle-speed mode)
VDD = VRST to 5.5 V (low-speed mode)
VDD = VRST to 5.5 V (default mode)
Limits
Min.
0.1
Max.
4.4
2.2
1.1
0.5
3.2
1.6
0.8
0.4
Unit
MHz
Typ.
Duty
40 % to 60 %
Notes 1: VRST: Detection voltage of voltage drop detection circuit.
2: The frequency at RC oscillation is affected by a capacitor, a resistor and a microcomputer. So,
set the constants within the range of the frequency limits.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| M34501M2-XXXFP | 4-BIT, MROM, MICROCONTROLLER, PDSO20 |
| M34501E4FP | 4-BIT, OTPROM, MICROCONTROLLER, PDSO20 |
| M34501M4-XXXFP | 4-BIT, MROM, MICROCONTROLLER, PDSO20 |
| M34501E4FP | 4-BIT, OTPROM, MICROCONTROLLER, PDSO20 |
| M34502M2-XXXFP | 4-BIT, MROM, MICROCONTROLLER, PDSO24 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M34501M2 | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34501M2-XXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34501M4 | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34501M4-XXXFP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
| M34502E4 | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER |
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