D-A CONVERTER
13.3 D-A conversion method
13.3 D-A conversion method
The reference voltage VREF is divided according to the value loaded in D-A register i, and it is output as
an analog voltage from pin DAi.
Figure 13.3.1 shows the equivalent circuit diagram of the D-A converter.
D-A
i
output enable bit
0
R
R
R
R
R
R
R
2R
DA
i
1
2R
2R
2R
2R
2R
2R
2R
2R
LSB
MSB
0
1
D-A register i
AVSS
VREF
Note: In this case, the value of D-A register i is “2A16.”
Fig. 13.3.1 Equivalent circuit diagram of D-A converter
7906 Group User’s Manual Rev.2.0
13-4