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| 型號(hào)： | M38856MC-XXXHP |
| 廠商： | Renesas Technology Corp. |
| 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)： | 66/103頁 |
| 文件大?。?/td> | 1580K |
| 代理商： | M38856MC-XXXHP |
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3885 Group
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
MITSUBISHI MICROCOMPUTERS
65
D-A CONVERTER
The 3885 group has two internal D-A converters (DA
1
and DA
2
)
with 8-bit resolution.
The D-A converter is performed by setting the value in each D-A
conversion register. The result of D-A conversion is output from
the DA
1
or DA
2
pin by setting the DA output enable bit to “1”.
When using the D-A converter, the corresponding port direction
register bit (P5
6
for DA
1
or P5
7
for DA
2
) must be set to “0” (input
status).
The output analog voltage V is determined by the value n (decimal
notation) in the D-A conversion register as follows:
V = V
REF
n/256 (n = 0 to 255)
Where V
REF
is the reference voltage.
At reset, the D-A conversion registers are cleared to “00
16
”, the
DA output enable bits are cleared to “0”, and the P5
6
/DA
1
/PWM
01
and P5
7
/DA
2
/PWM
11
pins become high impedance.
The DA output does not have buffers. Accordingly, connect an ex-
ternal buffer when driving a low-impedance load.
Fig. 62 Block diagram of D-A converter
Fig. 63 Equivalent connection circuit of D-A converter (DA1)
P
5
6
/
D
A
1
/
P
W
M
0
1
D
-
A
1
c
o
n
v
e
r
s
i
o
n
r
e
g
i
s
t
A
1
e
r
(
8
)
R
-
2
R
r
e
s
i
s
t
o
r
l
a
d
d
e
r
D
o
u
t
p
u
t
e
a
b
l
e
b
i
t
P
5
7
/
D
A
2
/
P
W
M
1
1
D
-
A
2
c
o
n
v
e
r
s
i
o
n
r
e
g
i
s
t
A
2
e
r
(
8
)
R-2R resistor ladder
D
o
u
t
p
u
t
e
n
a
b
l
e
b
i
t
D
a
t
a
b
u
s
AV
SS
V
R
E
F
“
0
”
“
1
”
M
S
“
0
B
”
“
1
”
R
2R
R
2R
R
2R
R
2R
R
2
R
R
2
R
R
2R
2
R
S
L
B
2
R
P
5
6
/
D
A
1
/
P
W
M
0
1
D-A1 conversion register
D
A
1
o
u
t
p
u
t
e
n
a
b
l
e
b
i
t
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|---|---|
| M38856ME-XXXHP | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38857M7-XXXHP | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38857M9-XXXHP | SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38857MC-XXXHP | SR13 Series Hall-Effect Digital Position Sensor; Snap-in Housing; Sinking Output; unipolar magnetics; 3.8 to 30 Vdc supply voltage |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| M38856MD-XXXHP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38856ME-XXXHP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38856MF-XXXHP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38857F1-HP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
| M38857F2-HP | 制造商:RENESAS 制造商全稱:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER |
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