Renesas M16C/6NK Hardware Manual page 238

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M16C/6N Group (M16C/6NK, M16C/6NM)
D/A Control Register
b7 b6 b5 b4 b3 b2
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 ladder.
D/A Register i (i = 0, 1)
b7
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 ladder.
Figure 17.2 DACON Register, DA0 and DA1 Registers
DAiE bit
"0"
r
DAi
"1"
MSB
DAi register
AVSS
(2)
VREF
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.
Figure 17.3 D/A Converter Equivalent Circuit
Rev.2.00 Nov 28, 2005
REJ09B0124-0200
(1)
b1 b0
Symbol
DACON
Bit Symbol
DA0E D/A0 Output Enable Bit
DA1E D/A1 Output Enable Bit
- Nothing is assigned. When write, set to "0".
(b7-b2) When read, their contents are "0".
(1)
Symbol
b0
DA0
DA1
Output value of D/A conversion
R R
2R 2R 2R
"0" "1"
page 220 of 378
Address After Reset
03DCh 00h
Bit Name
0 : Output disabled
1 : Output enabled
0 : Output disabled
1 : Output enabled
Address After Reset
03D8h 00h
03DAh 00h
Function
R R R
2R 2R 2R
17. D/A Converter
Function
RW
RW
RW
-
Setting Range
RW
00h to FFh RW
R R 2R
2R 2R
LSB