M16C62P_06 Datasheet, PDF (267/421 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/60 SERIES

M16C/62P Group (M16C/62P, M16C/62PT)
19. D/A Converter
D/A Control Register ⁽¹⁾
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
DACON
Bit Symbol
Address
03DCh
Bit Name
After Reset
00h
Function
RW
D/A0 Output Enable Bit
0 : Output disabled
DA0E
1 : Output enabled
RW
D/A1 Output Enable Bit
0 : Output disabled
DA1E
1 : Output enabled
RW
—
Nothing is assigned.
(b7-b2) When w rite, set to “0”. When read, their contents are “0”.
—
NOTES :
1. When not using the D/A converter, clear the DAiE bit (i = 0 to 1) to “0” (output disabled) to reduce the unnecessary
current consumption in the chip and set the DAi register to “00h” to prevent current from flow ing into the R-2R resistor
D/Ai Register (i = 0 to 1) ⁽¹⁾
b7
b0
Symbol
DA0
DA1
Address
03D8h
03DAh
Function
After Reset
00h
00h
Setting Range
RW
Output value of D/A conversion
00h to FFh
RW
NOTES :
1. When not using the D/A converter, clear the DAiE bit (i = 0 to 1) to “0” (output disabled) to reduce the unnecessary
current consumption in the chip and set the DAi register to “00h” to prevent current from flow ing into the R-2R resistor
Figure 19.2 DACON, DA0 and DA1 Registers
DAiE bit
“0”
r
R
R
R
R
R
R
R
2R
DAi
“1”
2R
2R
2R
2R
2R
2R
2R
2R
MSB
LSB
DAi register
“0”
“1”
AVSS
VREF ⁽²⁾
i = 0 to 1
NOTES:
1. The above diagram shows an instance in which the DA0 register is assigned “2Ah”.
2. VREF is not related to VCUT bit setting in the AD0CON1 register.
Figure 19.3 D/A Converter Equivalent Circuit
Rev.2.41 Jan 10, 2006 Page 252 of 390
REJ09B0185-0241