M16C65 Datasheet, PDF (721/829 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M16C/60

Under development
M16C/65 Group
Preliminary Specification
This is a preliminary specification and is subject to change.
28. D/A Converter
28.3 Operations
D/A conversion is performed by writing a value to the DAi register (i = 0 to 1).
Output analog voltage (V) is determined by the value n (n = decimal) set in the DAi register.
V = VREF × ----n----- (n = 0 to 255)
256
VREF: Reference voltage
Figure 28.2 shows D/A Converter Equivalent Circuit.
r ^{DAiE bit}
R
R
R
R
DAi
2R
2R
2R
2R
2R
MSB
DAi register
0
1
AVSS
VREF ⁽²⁾
i = 0 to 1
Notes:
1. The above diagram applies when the DAi register is set to 2Ah.
2. VREF is not related to the ADSTBY bit in the ADCON1 register.
Figure 28.2 D/A Converter Equivalent Circuit
R
2R
R
2R
R
2R
2R
LSB
REJ09B0484-0030 Rev.0.30 Sep 09, 2008
Page 686 of 791