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Mitsubishi microcomputers
M16C / 62P Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
A-D Converter
202
Under
development
Preliminary Specifications Rev.1.0
Specifications in this manual are tentative and subject to change.
A-D control register 0 (Note)
Symbol
Address
After reset
ADCON0
03D616
00000XXX2
b7
b6
b5
b4
b3
b2
b1
b0
Analog input pin
select bit
CH0
Bit symbol
Bit name
Function
CH1
CH2
A-D operation mode
select bit 0
1 1 : Repeat sweep mode 0 or
Repeat sweep mode 1
MD0
MD1
Trigger select bit
0 : Software trigger
1 : ADTRG trigger
TRG
ADST
A-D conversion start flag
0 : A-D conversion disabled
1 : A-D conversion started
Frequency select bit 0
CKS0
RW
A-D control register 1 (Note 1)
Symbol
Address
After reset
ADCON1
03D716
0016
Bit name
Function
Bit symbol
b7
b6
b5
b4
b3
b2
b1
b0
A-D sweep pin select bit
SCAN0
SCAN1
MD2
BITS
8/10-bit mode select bit
0 : 8-bit mode
1 : 10-bit mode
VCUT
OPA0
Vref connect bit (Note 3)
OPA1
A-D operation mode
select bit 1
1 : Vref connected
External op-amp
connection mode
bit
1 1
Invalid in repeat sweep mode 1
1
b4 b3
When repeat sweep mode 1 is selected
0 0 : AN0 (1 pin)
0 1 : AN0, AN1 (2 pins)
1 0 : AN0 to AN2 (3 pins)
1 1 : AN0 to AN3 (4 pins)
(Note 2)
b1 b0
0 0 : ANEX0 and ANEX1 are not used
0 1 : Must not be set
1 0 : Must not be set
1 1 : External op-amp connection mode
b7 b6
1
Frequency select bit 1
CKS1
Set to “1” when repeat sweep mode 1 is
selected
RW
See Note 3 for the ADCON2 register
Note: If the ADCON0 register is rewritten during A-D conversion, the conversion result will be indeterminate.
Note 1: If the ADCON1 register is rewritten during A-D conversion, the conversion result will be indeterminate.
Note 2: AN00 to AN07, and AN20 to AN27 can be used in the same way as AN0 to AN7. Use the ADCON2 register’s
ADGSEL1 to ADGSEL0 bits to select the desired pin. However, if VCC2 < VCC1, do not use AN00 to AN07 and
AN20 to AN27 as analog input pins.
Note 3: If the VCUT bit is reset from “0” (Vref unconnected) to “1” (Vref connected), wait for 1 s or more before starting
A-D conversion.
See Note 3 for the ADCON2 register
Figure 1.22.8. ADCON0 Register and ADCON1 Register (Repeat Sweep Mode 1)