M30621ECGP MITSUBISHI [Mitsubishi Electric Semiconductor], M30621ECGP Datasheet - Page 137

• Manufacturer Part Number: M30621ECGP
• Description: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
• Manufacturer: MITSUBISHI [Mitsubishi Electric Semiconductor]

D-A Converter
Figure 1.16.2. D-A control register
Figure 1.16.3. D-A converter equivalent circuit
DA0
AV
V
REF
SS
D-A0 register0
Note 1: The above diagram shows an instance in which the D-A register is assigned 2A
Note 2: The same circuit as this is also used for D-A1.
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 to 00
b7
D-A control register
D-A register
b7
b6
D-A0 output enable bit
so that no current flows in the resistors Rs and 2Rs.
b5
MSB
b4
“0”
“1”
2R
b3
“0”
b2
b1
“1”
b0
b0
R
Nothing is assigned.
In an attempt to write to these bits, write “0”. The value, if read, turns out to be “0”.
2R
Bit symbol
Output value of D-A conversion
DA0E
DA1E
Symbol
DACON
Symbol
DAi (i = 0,1)
R
2R
D-A0 output enable bit
D-A1 output enable bit
Bit name
03D8
R
Address
Address
2R
03DC
16
,
03DA
16
Function
16
R
2R
0 : Output disabled
1 : Output enabled
0 : Output disabled
1 : Output enabled
Indeterminate
When reset
When reset
16
.
00
16
R
2R
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Function
R
2R
M16C / 62 Group (80-pin)
R W
R W
R
R
Mitsubishi microcomputers
2R
W
LSB
2R
16
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