D-A CONVERTER
13.1 Overview, 13.2 Block description
13.1 Overview
The M37905 is provided with two independent D-A converters of the R-2R type with 8-bit resolution. These
D-A converters convert the values loaded in D-A register i (i = 0, 1) to analog voltages and output them from
pin DA .
i
13.2 Block description
Figure 13.2.1 shows the block diagram of the D-A converter. The registers related to the D-A converter are
described below.
Data bus
D-A register i (i = 0, 1)
(Addresses 9816, 9916
)
V
REF
R-2R ladder network
AVSS
D-A output enable bit
i
DA
i
Fig. 13.2.1 D-A converter block diagram
7905 Group User’s Manual Rev.1.0
13-2
RENESAS [ RENESAS TECHNOLOGY CORP ]
