M30622MA-XXXFP RENESAS [Renesas Technology Corp], M30622MA-XXXFP Datasheet - Page 429

• Manufacturer Part Number: M30622MA-XXXFP
• Description: 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY
• Manufacturer: RENESAS [Renesas Technology Corp]

D-A Converter
414
2.8 D-A Converter
Figure 2.8.1. Memory map of D-A converter-related registers
Figure 2.8.2. D-A converter-related registers
2.8.1 Overview
The D-A converter used in the M16C/62 group is based on the 8-bit R-2R technique.
(1) Output voltage
(2) Conversion time
(3) Output from the D-A converter and the direction register
(4) Pins related to the D-A converter
(5) Registers related to the D-A converter
(6) Note
The D-A converter outputs voltage within a range from 0 V to V
by V
The D-A converter is not effected by the Vref connection bit of the A-D converter.
tsu = 3 s
To use the D-A converter, do not set the direction register of the relevant port to output.
• DA
• AVcc pin
• V
• AVss pin
Figure 2.8.1 shows the memory map of D-A converter-related registers, and Figure 2.8.2 shows D-A
converter-related registers.
D-A output pins shared with P9
REF
REF
0
b7
D-A control register
D-A register
b7
pin, DA
pin
/(256) X the D-A register contents.
b6
b5
b4
1
b3
pin
b2
b1
b0
b0
Output pins of the D-A converter
The power source pin of the analog section
Input pin of the reference voltage
The GND pin of the analog section
03D8
03D9
03DA
03DB
03DC
Bit symbol
Nothing is assigned.
In an attempt to write to these bits, write “0”. The value, if read, turns out to be “0”
Output value of D-A conversion
DA0E
DA1E
16
16
16
16
Symbol
DACON
Symbol
DAi (i = 0,1)
16
3
D-A register 0 (DA0)
D-A register 1 (DA1)
D-A control register (DACON)
and P9
D-A0 output enable bit
D-A1 output enable bit
Bit name
03D8
4
. The two pins are input ports and floating at the reset.
Address
Address
03DC
16
,
03DA
16
Function
16
0 : Output disabled
1 : Output enabled
0 : Output disabled
1 : Output enabled
Indeterminate
When reset
When reset
00
16
Function
REF
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
. The output voltage is determined
R W
R W
R
W
Mitsubishi microcomputers
M16C / 62 Group