Renesas M16C/62P Series Hardware Manual page 267

M16C/62P Group (M16C/62P, M16C/62PT)
D/A Control Register
b7 b6 b5 b4 b3 b2 b1 b0
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 flow ing into the R-2R resistor
D/Ai Register (i = 0 to 1)
b7 b0
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 flow ing into the R-2R resistor
Figure 19.2 DACON, DA0 and DA1 Registers
DAiE bit
"0"
r
DAi
"1"
MSB
DAi register
AVSS
(2)
VREF
i = 0 to 1
NOTES:
1. The above diagram shows an instance in which the DA0 register is assigned "2Ah".
2. VREF is not related to VCUT bit setting in the AD0CON1 register.
Figure 19.3 D/A Converter Equivalent Circuit
Rev.2.41 Jan 10, 2006
REJ09B0185-0241
http://www.xinpian.net
(1)
Symbol Address
03DCh
DACON
Bit Name
Bit Symbol
D/A0 Output Enable Bit
DA0E
D/A1 Output Enable Bit
DA1E
— Nothing is assigned.
(b7-b2) When w rite, set to "0". When read, their contents are "0".
(1)
Symbol Address
03D8h
DA0
03DAh
DA1
Function
Output value of D/A conversion
R R
2R 2R 2R
"0" "1"
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0 : Output disabled
1 : Output enabled
0 : Output disabled
1 : Output enabled
R R R
2R 2R 2R
19. D/A Converter
After Reset
00h
Function
After Reset
00h
00h
Setting Range
00h to FFh
R R
2R 2R
010-62245566 13810019655
RW
RW
RW
—
RW
RW
2R
LSB