- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄370955 > M38869M8A-012HP (Mitsubishi Electric Corporation) SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER PDF資料下載
參數(shù)資料
| 型號： | M38869M8A-012HP |
| 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(jī) |
| 文件頁數(shù)： | 54/110頁 |
| 文件大小： | 1601K |
| 代理商： | M38869M8A-012HP |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁第51頁第52頁第53頁當(dāng)前第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁第81頁第82頁第83頁第84頁第85頁第86頁第87頁第88頁第89頁第90頁第91頁第92頁第93頁第94頁第95頁第96頁第97頁第98頁第99頁第100頁第101頁第102頁第103頁第104頁第105頁第106頁第107頁第108頁第109頁第110頁
54
3886 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
COMPARATOR CIRCUIT
Comparator Configuration
The comparator circuit consists of resistors, comparators, a com-
parator control circuit, the comparator reference input selection bit
(bit 7 of address 001D
16
), a comparator data register (address
002D
16
), the comparator reference power source input pin (P0
0
/
P3
REF
) and analog signal input pins (P3
0
–P3
7
). The analog input
pin (P3
0
–P3
7
) also functions as an ordinary digital port.
Comparator Operation
To activate the comparator, first set port P3 to input mode by set-
ting the corresponding direction register (address 0007
16
) to “0” to
use port P3 as an analog voltage input pin. The internal fixed ana-
log voltage (V
CC
29/32) can be generated by setting “1” to the
comparator reference input selection bit (bit 7) of the serial I/O2
control register (address 001D
16
). (The internal fixed analog volt-
age becomes about 4.5 V at V
CC
= 5.0 V.) When setting “0” to the
comparator reference input selection bit, the P0
0
/P3
REF
pin be-
comes the comparator reference power source input pin and it is
possible to input the comparator reference power source option-
ally from the external. The voltage comparison is immediately
performed by the writing operation to the comparator data register
(address 002D
16
). After 14 cycles of the internal system clock
φ
(the time required for the comparison), the comparison result is
stored in the comparator register (address 002D
16
).
If the analog input voltage is greater than the internal reference
voltage, each bit of this register is “1”; if it is less than the internal
reference voltage, each bit of this register is “0”. To perform an-
other comparison, the voltage comparison must be performed
again by writing to the comparator data register (address 002D
16
).
Read the result when 14 cycles of
φ
or more have passed after the
comparator operation starts. The ladder resistor is turned on dur-
ing 14 cycles of
φ
, which is required for the comparison, and the
reference voltage is generated. An unnecessary current is not
consumed because the ladder resistor is turned off while the com-
parator operation is not performed. Since the comparator consists
of capacitor coupling, the electric charge is lost if the clock fre-
quency is low.
Keep that the clock frequency is 1 MHz or more during the com-
parator operation. Do not execute the STP, WIT, or port P3 I/O
instruction.
Fig. 52 Comparator circuit
V
S
S
8
8
V
C
C
P
3
(
8
)
P
3
7
P
3
6
P
3
0
b
0
C
b
r
e
o
i
m
(
g
i
p
i
t
a
t
e
r
a
)
(
a
t
o
d
o
r
d
s
r
r
e
e
e
f
r
s
e
i
a
s
r
e
l
0
n
I
/
0
c
O
1
e
2
D
1
i
c
6
)
n
p
o
u
n
t
r
o
s
e
l
l
e
c
t
i
o
n
t
b
s
7
r
f
t
C
(
a
o
m
d
d
p
r
a
s
r
a
s
t
0
o
r
2
d
D
1
a
t
a
6
)
r
e
g
i
s
t
e
r
e
0
C
a
o
t
m
r
p
a
r
-
o
L
c
a
o
d
n
d
n
e
e
r
c
t
r
i
e
n
s
g
i
s
s
t
i
o
g
r
n
a
l
C
c
o
o
m
n
p
r
o
a
l
r
c
a
i
t
r
o
c
r
u
i
t
t
C
s
o
i
m
n
p
a
a
r
a
t
o
r
c
o
n
n
e
c
t
i
n
g
g
l
C
a
o
t
m
r
p
a
r
-
o
C
a
o
t
m
r
p
a
r
-
o
P
0
0
/
P
3
R
E
F
V
C
C
2
9
/
3
2
“1
”
“0
”
D
a
t
a
b
u
s
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| M38B40EDH-XXXXFP | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38B4XMXH | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38B43EDH-XXXXFP | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38B43M2H-XXXXFP | OSC 3.3V SMT 7X5 CMOS |
| M38B43M3H-XXXXFP | OSC 3.3V SMT 7X5 CMOS |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M38869M8A-XXXGP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38869M8A-XXXHP | 制造商:MITSUBISHI 制造商全稱:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38869M8-XXXHP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38869M9-XXXHP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38869MA-XXXHP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。