M16C80 Datasheet, PDF (188/358 Pages) Renesas Technology Corp – RENESAS 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/80 SERIES

M16C/80 Group
22. D/A Converter
D/A control register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
DACON
Address
039C16
When reset
0016
Bit symbol
Bit name
DA0E
D/A0 output enable bit
Function
0 : Output disabled
1 : Output enabled
DA1E
D/A1 output enable bit
0 : Output disabled
1 : Output enabled
Nothing is assigned.
When write, set "0". When read, the value of these bits is "0".
D/A register i
b7
Symbol
Address
When reset
b0
DAi (i = 0,1)
039816, 039A16
Indeterminate
Function
Output value of D/A conversion
Figure 22.2 D/A control register
RW
R^{R W}W
D/A0 output enable bit
"0"
R
DA0
"1"
2R
2R
MSB
D/A register 0 _"0"
"1"
AVSS
VREF
R
2R
R
2R
R
2R
R
2R
R
2R
R
2R
2R
LSB
Note 1: In the above figure, the D/A register value is "2A16".
Note 2: This circuit is the same in D/A1.
Note 3: To save power when not using the D/A converter, set the D/A output enable bit to "0"
and the D/A register to "0016", and prevent current flowing to the R-2R resistance.
Figure 22.3 D/A converter equivalent circuit
Rev.1.00 Aug. 02, 2005 ^{Page 177} of 329
REJ09B0187-0100