M38062M3-156FP MITSUBISHI [Mitsubishi Electric Semiconductor], M38062M3-156FP Datasheet - Page 26

• Manufacturer Part Number: M38062M3-156FP
• Description: SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
• Manufacturer: MITSUBISHI [Mitsubishi Electric Semiconductor]

D-A Converter
The 3806 group has two internal D-A converters (DA1 and DA2)
with 8-bit resolutions.
The D-A converter is performed by setting the value in the D-A
conversion register. The result of D-A converter is output from the
DA
When using the D-A converter, the corresponding port direction
register bit (DA
tus).
The output analog voltage V is determined by the value n (base
10) in the D-A conversion register as follows:
V = V
Where V
At reset, the D-A conversion registers are cleared to “00
output enable bits are cleared to “0”, and the P5
DA
The D-A output is not buffered, so connect an external buffer when
driving a low-impedance load.
Set V
Fig. 21 Equivalent connection circuit of D-A converter
26
1
2
or DA
pins are set to input (high impedance).
CC
REF
P5
to 4.0 V or more when using the D-A converter.
REF
D-A1 conversion
register
AV
V
2
REF
pin by setting the DA output enable bit to “1”.
n/256 (n = 0 to 255)
6
SS
is the reference voltage.
/DA1
1
/P5
6
or DA
"1"
"0"
2
/P5
DA
7
) should be set to “0” (input sta-
1
MSB
output enable bit
"0"
2R
"1"
R
6
/DA
1
16
2R
and P5
”, the DA
R
7
/
2R
R
Fig. 20 Block diagram of D-A converter
2R
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
R
D-A1 conversion register (8)
D-A2 conversion register (8)
R-2R resistor ladder
R-2R resistor ladder
2R
R
MITSUBISHI MICROCOMPUTERS
2R
R
DA
DA
3806 Group
2R
1
2
R
output enable bit
output enable bit
P5
P5
LSB
2R
2R
6
7
/DA
/DA
1
2