M16C6NK Datasheet, PDF (238/404 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/60 SERIES

Under development
This document is under development and its contents are subject to change.
M16C/6N Group (M16C/6NK, M16C/6NM)
17. D/A Converter
D/A Control Register ⁽¹⁾
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
DACON
Address
03DCh
After Reset
00h
Bit Symbol
Bit Name
Function
RW
DA0E D/A0 Output Enable Bit
0 : Output disabled
1 : Output enabled
RW
0 : Output disabled
DA1E D/A1 Output Enable Bit
1 : Output enabled
RW
-
Nothing is assigned. When write, set to "0".
(b7-b2) When read, their contents are "0".
-
NOTE:
1. When not using the D/A converter, set the DAiE bit (i = 0, 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 flowing into the R-2R
resistor ladder.
D/A Register i (i = 0, 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
NOTE:
1. When not using the D/A converter, set the DAiE bit (i = 0, 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 flowing into the R-2R
resistor ladder.
Figure 17.2 DACON Register, DA0 and DA1 Registers
DAiE bit
"0"
r
R
R
R
R
DAi
"1"
2R
2R
2R
2R
2R
MSB
DAi register
"0"
"1"
AVSS
VREF ⁽²⁾
i = 0, 1
NOTES:
1. The above diagram shows an instance in which the DAi register is assigned "2Ah".
2. VREF is not related to VCUT bit setting in the ADCON1 register.
Figure 17.3 D/A Converter Equivalent Circuit
R
2R
R
2R
R
2R
2R
LSB
Rev.2.00 Nov 28, 2005 page 220 of 378
REJ09B0124-0200