Renesas M16C/64A Series User Manual page 683

M16C/64A Group
28.3 Operations
D/A conversion is performed by writing a value to the DAi register (i = 0, 1).
Output analog voltage (V) is determined by the value n (n = decimal) set in the DAi register.
n
V = VREF ×
--------- -
256
VREF: Reference voltage
Figure 28.2 shows the D/A Converter Equivalent Circuit.
DAiE
DACON register
r
DAi
DAi register
AVSS
(2)
VREF
i = 0, 1
Notes:
1. The above diagram assumes the DAi register is 2Ah.
2. VREF is not related to the ADSTBY bit in the ADCON1 register.
Figure 28.2 D/A Converter Equivalent Circuit
R01UH0136EJ0210 Rev.2.10
Jul 31, 2012
(n = 0 to 255)
bit in the
R R
2R 2R 2R
MSB
0 1
R
R R
2R
2R 2R
28. D/A Converter
R R 2R
2R 2R
LSB
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