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參數(shù)資料
| 型號： | M38C33M6MXXXFP |
| 廠商： | Mitsubishi Electric Corporation |
| 英文描述： | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| 中文描述： | 單芯片8位CMOS微機 |
| 文件頁數(shù)： | 26/62頁 |
| 文件大?。?/td> | 881K |
| 代理商： | M38C33M6MXXXFP |
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26
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
38C3 Group
A-D CONVERTER
The 38C3 group has a 10-bit A-D converter. The A-D converter per-
forms successive approximation conversion.
[A-D Conversion Register (AD)] 0033
16
, 0034
16
One of these registers is a high-order register, and the other is a low-
order register. The high-order 8 bits of a conversion result is stored in
the A-D conversion register (high-order) (address 0034
16
), and the
low-order 2 bits of the same result are stored in bit 7 and bit 6 of the
A-D conversion register (low-order) (address 0033
16
).
During A-D conversion, do not read these registers.
[A-D Control Register (ADCON)] 0032
16
This register controls A-D converter. Bits 2 to 0 are analog input pin
selection bits. Bit 4 is an AD conversion completion bit and “0” during
A-D conversion. This bit is set to “1” upon completion of A-D conver-
sion.
A-D conversion is started by setting “0” in this bit.
[Comparison Voltage Generator]
The comparison voltage generator divides the voltage between AV
SS
and V
REF
, and outputs the divided voltages.
[Channel Selector]
The channel selector selects one of the input ports P6
7
/AN7–P6
0
/
AN0 and inputs it to the comparator.
[Comparator and Control Circuit]
The comparator and control circuit compares an analog input volt-
age with the comparison voltage and stores the result in the A-D
conversion register. When an A-D conversion is completed, the con-
trol circuit sets the AD conversion completion bit and the AD conver-
sion interrupt request bit to “1.”
Fig. 26 Block diagram of A-D converter
Note that the comparator is constructed linked to a capacitor, so set
f(X
IN
) to at least 500 kHz during A-D conversion. Use a CPU system
clock dividing the main clock X
IN
as the internal system clock.
Fig. 25 Structure of A-D control register
AD conversion result stored bits
A-D conversion register (high-order)
(ADH: address 0034
16
)
b7
b0
Analog input pin selection bits
000: P6
0
/AN
0
001: P6
1
/AN
1
010: P6
2
/AN
2
011: P6
3
/AN
3
100: P6
4
/AN
4
101: P6
5
/AN
5
110: P6
6
/AN
6
111: P6
7
/AN
7
A-D control register
(ADCON: address 0032
16
)
AD conversion completion bit
0: Conversion in progress
1: Conversion completed
Not used (returns “0” when read)
b7
b0
Not used (returns “0” when read)
AD conversion result stored bits
A-D conversion register (low-order)
(ADL: address 0033
16
)
b7
b0
Not used (returns “0” when read)
Data bus
AV
SS
A-D interrupt request
b7
b0
3
P6
0
/AN
0
P6
1
/AN
1
P6
2
/AN
2
P6
3
/AN
3
P6
4
/AN
4
P6
5
/AN
5
P6
6
/AN
6
P6
7
/AN
7
A-D control register
C
Comparator
A-D control circuit
A-D conversion register (H)
A-D conversion register (L)
(Address 0034
16
)
(Address 0033
16
)
Resistor ladder
V
REF
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| M38C33M6MXXXFS | ECONOLINE: RSZ/P - 1kVDC |
| M38C33M7AXXXFP | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38C33M7AXXXFS | ECONOLINE: RSZ/P - 1kVDC |
| M38C34M7AXXXFS | ECONOLINE: RSZ/P - 1kVDC |
| M38C34M7MXXXFP | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M38C33M6MXXXFS | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38C33M7A | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38C33M7AXXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 38000 SERIES |
| M38C33M7AXXXFS | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38C33M7MXXXFP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 38000 SERIES |
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