UPD78F1502AGK-GAK-AX Datasheet, PDF (437/1031 Pages) Renesas Technology Corp – 16-Bit Single-Chip Microcontrollers

78K0R/Lx3
CHAPTER 11 D/A CONVERTER (μ PD78F150xA only)
(2) D/A converter mode register (DAM)
This register controls the operation of the D/A converter.
DAM can be set by a 1-bit or 8-bit memory manipulation instruction.
Reset signal generation clears this register to 00H.
Figure 11-3. Format of D/A Converter Mode Register (DAM)
Address: FFF5CH After reset: 00H R/W
Symbol
7
6
<5>
DAM
0
DAREF
DACE1
<4>
DACE0
3
DARES1
2
DARES0
1
DAMD1
DAREF
0
1
Positive reference voltage supply selection of D/A converter^Note1
AVDD1 (power supply for D/A converter analog circuit)
VREFOUT (voltage reference output) / ^Note2 AVREFP (external voltage reference input)
0
DAMD0
DACEn
0
1
D/A conversion operation Control (n = 0, 1)
Stops conversion operation
Enables conversion operation
DARESn
0
1
8-bit
12-bit
D/A converter resolution selection (n = 0, 1)
DAMDn
0
1
D/A converter operation mode selection (n = 0, 1)
Normal mode
Real-time output mode
Notes 1.
2.
The reference voltage of the D/A converter cannot be specified separately for each channel because it is
common to both channels.
To use an output voltage of the voltage reference for the positive reference voltage of the D/A converter
(DAREFP), start operating the voltage reference before setting the D/A conversion operation (see CHAPTER
13 VOLTAGE REFERENCE). Furthermore, do not change the voltage reference setting during the D/A
conversion operation.
Remark The positive reference voltage of the D/A converter is as follows, according to the DAREF, VRSEL and
VRON settings.
DAREF
0
1
1
Table 11-2. Settings of DAREF, VRSEL and VRON
VRSEL
×
0
1
VRON
×
0
1
Positive reference voltage of D/A converter (DAREFP)
AVDD1
AVREFP
VREFOUT
×: don’t care
R01UH0004EJ0501 Rev.5.01
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Jun 20, 2011