UPD784026 Renesas Electronics Corporation., UPD784026 Datasheet - Page 436

• Manufacturer Part Number: UPD784026
• Description: 16/8-bit Single-chip Microcontrollers
• Manufacturer: Renesas Electronics Corporation.

(1) D/A conversion value setting registers (DACS0, DACS1)
(2) Resistor string
(3) Tap selector
396
These registers are used to set the voltage values to be output to the ANOn pins (n = 0, 1). The voltage value output
to the ANOn pin is given by the following expression:
ANOn =
RESET input initializes these registers to 00H.
256 resistors with the same resistance value are connected in series, and the ends are connected to the AV
and the AV
pin.
One of the 256 resistor string taps is selected in accordance with the value of the D/A conversion value setting register
(DACSn: n = 0, 1), and is connected to the ANOn (n = 0, 1) pin.
When RESET is low (0), and when DACEn = 0, the ANOn pin is not connected to any tap; that is, it is placed in the
output high impedance state.
AV
REF3
REF
2
256
pin respectively. Two independent resistor strings are incorporated, for the ANO0 pin and the ANO1
–
AV
REF
3
DACSn + AV
CHAPTER 15 D/A CONVERTER
REF3
[v]
REF2
pin