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Rev.2.10 Apr 14, 2006 page 220 of 378
REJ09B0124-0210
M16C/6N Group (M16C/6NK, M16C/6NM) 17. D/A Converter
Figure 17.2 Registers DACON, DA0, and DA1
Figure 17.3 D/A Converter Equivalent Circuit
D/A Control Register
(1)
Symbol Address After Reset
Symbol Address After Reset
DACON 03DCh
03D8h
03DAh
00h
b7 b6 b5 b4 b3 b2 b1 b0
D/A0 output enable bit
Bit Symbol Bit Name Function
RW
D/A1 output enable bit
DA0
DA1
00h
00h
b7 b0
Function
Output value of D/A conversion
RW
RW
-
RW
RW
DA0E
DA1E
-
(b7-b2)
0 : Output disabled
1 : Output enabled
0 : Output disabled
1 : Output enabled
Nothing is assigned. If necessary, set to 0.
When read, the content is 0.
NOTE:
1. When not using the D/A converter, set the DAiE bit (i = 0, 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.
NOTE:
1. When not using the D/A converter, set the DAiE bit (i = 0, 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.
D/A Register i (i = 0, 1)
(1)
00h to FFh
Setting Range
2R
R
2R
R
2R
R
2R
R
2R
R
2R
R
2R
R
2R
2R
DAiE bit
10
MSB LSB
DAi register
r
i = 0, 1
NOTES:
1. The above diagram shows an instance in which the DAi register is assigned 2Ah.
2. VREF is not related to VCUT bit setting in the ADCON1 register.
1
0
VREF
(2)
AVSS
DAi
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