M30222 Datasheet, PDF (168/237 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

deUvnedloepr ^ment
Specifications in this manual are tentative and subject to change
MITSUBISHI MICROCOMPUTERS
M30222 Group
Rev. G
D-A Converter
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
D-A control register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
DACON
Address
03DC16
When reset
0016
Bit symbol
Bit name
Function
RW
DA0E
D-A0 output enable bit
0 : Output disabled
1 : Output enabled
DA1E
D-A1 output enable bit
0 : Output disabled
1 : Output enabled
Nothing is assigned.
Write "0" when writing to these bits. If read, the value is "0".
D-A register
b7
Symbol
Address
When reset
b0 _{DAi (i = 0,1) 03D816, 03DA16 Indeterminate}
Function
RW
Output value of D-A conversion
Fig. 1.136. D-A control register
D-A0 output enable bit
"0"
R
R
R
R
R
R
R
2R
DA0
"1"
2R
2R
2R
2R
2R
2R
2R
2R
MSB
LSB
D-A0 register0
AVSS
VREF
Note 1: The above diagram shows an instance in which the D-A register is assigned 2A16.
Note 2: D-A1 is equivalent to this circuit.
Note 3: To reduce the current consumption when the D-A converter is not used, set the D-A output enable bit to 0
and set the D-A register ot 0016 so that no current flows in the resistors Rs and 2Rs.
Fig. 1.137. D-A converter equivalent circuit
1-169