M30622M4 MITSUBISHI [Mitsubishi Electric Semiconductor], M30622M4 Datasheet - Page 156

• Manufacturer Part Number: M30622M4
• Description: SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
• Manufacturer: MITSUBISHI [Mitsubishi Electric Semiconductor]

A-D Converter
156
Table 1.20.2. One-shot mode specifications
Figure 1.20.4. A-D conversion register in one-shot mode
(1) One-shot mode
Function
Start condition
Stop condition
Interrupt request generation timing End of A-D conversion
Input pin
Reading of result of A-D converter
In one-shot mode, the pin selected using the analog input pin select bit is used for one-shot A-D conver-
sion. Table 1.20.2 shows the specifications of one-shot mode. Figure 1.20.4 shows the A-D control regis-
ter in one-shot mode.
Item
A-D control register 0 (Note 1)
b7
A-D control register 1 (Note)
b7
b6
b6
b5
b5
1
b4
0
b4
b3
b3
0
b2
b2
0
The pin selected by the analog input pin select bit is used for one A-D conversion
Writing “1” to A-D conversion start flag
• End of A-D conversion (A-D conversion start flag changes to “0”, except
• Writing “0” to A-D conversion start flag
One of AN
Read A-D register corresponding to selected pin
when external trigger is selected)
b1
b1
b0
b0
Note 1: If the A-D control register is rewritten during A-D conversion, the conversion
Note 2: When changing A-D operation mode, set analog input pin again.
Note: If the A-D control register is rewritten during A-D conversion, the conversion
Bit symbol
Bit symbol
SCAN0
SCAN1
ADST
CKS0
MD0
MD1
TRG
CKS1
VCUT
OPA0
OPA1
CH0
CH1
CH2
MD2
BITS
Symbol
ADCON0
Symbol
ADCON1
result is indeterminate.
0
result is indeterminate.
to AN
Analog input pin select
bit
Trigger select bit
A-D conversion start flag 0 : A-D conversion disabled
A-D sweep pin
select bit
A-D operation mode
select bit 1
Vref connect bit
External op-amp
connection mode bit
A-D operation mode
select bit 0
Frequency select bit 0
8/10-bit mode select bit
Frequency select bit1
7
, as selected
Bit name
Bit name
Address
Address
03D6
03D7
16
16
Specification
0 : Any mode other than repeat sweep
0 : f
1 : f
b7 b6
0 0 : ANEX0 and ANEX1 are not used
0 1 : ANEX0 input is A-D converted
1 0 : ANEX1 input is A-D converted
1 1 : External op-amp connection mode
Invalid in one-shot mode
0 : 8-bit mode
1 : 10-bit mode
1 : Vref connected
0 0 : One-shot mode
00000XXX
b2 b1 b0
0 0 0 : AN
0 0 1 : AN
0 1 0 : AN
0 1 1 : AN
1 0 0 : AN
1 0 1 : AN
1 1 0 : AN
1 1 1 : AN
b4 b3
0 : Software trigger
1 : AD
1 : A-D conversion started
0: f
1: f
When reset
When reset
mode 1
AD
AD
AD
AD
00
/4 is selected
/2 is selected
/2 or f
is selected
TRG
16
0
1
2
3
4
5
6
7
trigger
AD
is selected
is selected
is selected
is selected
is selected
is selected
is selected
is selected
2
/4 is selected
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
Function
Function
(Note 2)
(Note 2)
Mitsubishi microcomputers
M16C / 62 Group
R
R
W
W