M32C8A Datasheet, PDF (290/372 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M32C/80 Series

M32C/8A Group
19. D/A Converter
D/A Control Register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
DACON
Address
039Ch
Bit Symbol
Bit Name
Function
DA0E
D/A0 output enable bit
0: Output disabled
1: Output enabled
DA1E
−
(b7-b2)
D/A1 output enable bit
0: Output disabled
1: Output enabled
Unimplemented.
Write 0. Read as undefined value.
After Reset
XXXX XX00b
RW
RW
RW
−
D/A Register i (i = 0,1)
b7
b0
Symbol
DA0, DA1
Address
0398h, 039Ah
Function
Output value of D/A conversion
After Reset
Undefined
Setting Range
RW
00h to FFh
RW
Figure 19.2 DACON Register, DA0 and DA1 Registers
DA0E
0
r
DA0
1
2R
MSB
Set in the DA0 register
0
AVSS
VREF⁽⁴⁾
R
2R
1
R
R
R
R
R
2R
2R
2R
2R
2R
R
2R
2R
LSB
NOTES:
1. The above applies when the DA0 register is set to 2Ah.
2. D/A1 has the same circuitry as the avove.
3. When the D/A converter is not used, set the DAiE bit (i = 0,1) in the DACON register to 0 (output disabled) and the DAi
register to 00h to stop current from flowing into the R-2R resistor to reduce unnecessary power consumption.
4. VREF remains connected even if the VCUT bit in the AD0CON1 register is set to 0 (VREF not connected).
Figure 19.3 D/A Converter Equivalent Circuit
Rev.1.00 Jul 15, 2007 Page 273 of 352
REJ09B0385-0100