M38867E8AHP MITSUBISHI [Mitsubishi Electric Semiconductor], M38867E8AHP Datasheet - Page 53

• Manufacturer Part Number: M38867E8AHP
• Description: SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER??
• Manufacturer: MITSUBISHI [Mitsubishi Electric Semiconductor]

D-A CONVERTER
The 3886 group has two internal D-A converters (DA
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
When using the D-A converter, the corresponding port direction
register bit (P5
“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
At reset, the D-A conversion registers are cleared to “00
DA output enable bits are cleared to “0”, and the P5
and P5
The DA output does not have buffers. Accordingly, connect an ex-
ternal buffer when driving a low-impedance load.
Set V
Fig. 51 Equivalent connection circuit of D-A converter (DA1)
Where V
P 5
CC
REF
1
7
6
D - A 1 c o n v e r s i o n r e g i s t e r
/ D A
V
/DA
A V
or DA
to 4.0 V or more when using the D-A converter.
R E F
S S
1
2
n/256 (n = 0 to 255)
REF
/ P W M
/PWM
2
6
pin by setting the DA output enable bit to “1”.
/DA
is the reference voltage.
0 1
11
1
/PWM
pins become high impedance.
“ 1 ”
“ 0 ”
01
or P5
D A
1
M S B
o u t p u t e n a b l e b i t
7
“ 0 ”
/DA
2
/PWM
2 R
“ 1 ”
11
R
) must be set to
6
/DA
1
and DA
1
2 R
/PWM
16
R
”, the
01
2
)
2 R
R
Fig. 50 Block diagram of D-A converter
2 R
D - A 1 c o n v e r s i o n r e g i s t e r ( 8 )
D - A 2 c o n v e r s i o n r e g i s t e r ( 8 )
R - 2 R r e s i s t o r l a d d e r
R - 2 R r e s i s t o r l a d d e r
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
R
2 R
MITSUBISHI MICROCOMPUTERS
R
D A
D A
2 R
R
1
2
o u t p u t e n a b l e b i t
o u t p u t e n a b l e b i t
3886 Group
P 5
P 5
2 R
R
6
7
/ D A
/ D A
1
2
/ P W M
/ P W M
L S B
2 R
2 R
0 1
1 1
53