M306V5ME-XXXSP Datasheet, PDF (154/262 Pages) Mitsubishi Electric Semiconductor – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER and ON-SCREEN DISPLAY CONTROLLER

MITSUBISHI MICROCOMPUTERS
M306V5ME-XXXSP
M306V5EESP
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
D-A control register
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
DACON
Address
03DC16
When reset
0016
Bit symbol
Bit name
DA0E
D-A0 output enable bit
Function
0 : Output disabled
1 : Output enabled
RW
DA1E
D-A1 output enable bit
0 : Output disabled
1 : Output enabled
Nothing is assigned.
In an attempt to write to these bits, write “0.” The value, if read, turns out to be “0.”
Figure 2.13.2 D-A control register
D-A register i (i = 0, 1)
Symbol
b7
b0
DAi (i = 0,1)
Address
03D816, 03DA16
When reset
Indeterminate
Function
Output value of D-A conversion
R_R W_W
Figure 2.13.3 D-A register i (i = 0 and 1)
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
VSS
VCC(VREF)
Note 1: The above diagram shows an instance in which the D-A register is assigned 2A16.
2: The same circuit as this is also used for D-A1.
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
0016 so that no current flows in the resistors Rs and 2Rs.
Figure 2.13.4 D-A converter equivalent circuit
154
Rev. 1.0