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M16C/62P Group (M16C/62P, M16C/62PT)
D/A Control Register
b7
b6
b5
b4
b3
NOTES:
1. When not using the D/A converter, clear the DAiE bit (i = 0 to 1) to "0" (output disabled) to reduce the
unnecessary current consumption in the chip and set the DAi register to "00h" to prevent current from
flowing into the R-2R resistor ladder.
D/Ai Register (i= 0 to 1)
b7
NOTES:
1. When not using the D/A converter, clear the DAiE bit (i = 0 to 1) to "0" (output disabled) to reduce the
unnecessary current consumption in the chip and set the DAi register to "00h" to prevent current from
flowing into the R-2R resistor ladder.
Figure 19.2 DACON Register, DA0 Register, and DA1 Register
DAiE bit
r
DAi
MSB
DAi register
AVSS
VREF
i = 0 to 1
NOTES:
1. The above diagram shows an instance in which the DA0 register is assigned "2Ah".
Figure 19.3 D/A Converter Equivalent Circuit
R
e
. v
2
3 .
0
S
e
p
0
, 1
2
0
0
4
R
E
J
0
9
B
0
1
8
5
0 -
2
3
0
Z
(1)
b2
b1
b0
Symbol
DACON
Bit Symbol
DA0E
D/A0 Output Enable Bit
DA1E
D/A1 Output Enable Bit
Nothing is assigned.
(b7-b2)
When write, set to "0". When read, their contents are "0".
(1)
Symbol
b0
DA0
DA1
Output value of D/A conversion
"0"
R
R
"1"
2R
2R
2R
"0"
"1"
page 225
f o
3
6
4
Address
After Reset
03DCh
Bit Name
0 : Output disabled
1 : Output enabled
0 : Output disabled
1 : Output enabled
Address
After Reset
03D8h
Indeterminate
03DAh
Indeterminate
Function
R
R
R
2R
2R
19. D/A Converter
00h
Function
R
R
2R
2R
2R
RW
RW
RW
RW
R
W
RW
2R
LSB
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