M30218 Datasheet, PDF (117/179 Pages) Mitsubishi Electric Semiconductor – M30218 Group

A-D converter
Mitsubishi microcomputers
M30218 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
A-D control register 0 (Note)
b7 b6 b5 b4 b3 b2 b1 b0
0
Symbol
ADCON0
Address
03D616
When reset
00000XXX2
Bit symbol
Bit name
CH0
Analog input pin select bit
CH1
CH2
MD0
MD1
A-D operation mode
select bit 0
Must always be “0”.
Function
b2 b1 b0
0 0 0 : AN0 is selected
0 0 1 : AN1 is selected
0 1 0 : AN2 is selected
0 1 1 : AN3 is selected
1 0 0 : AN4 is selected
1 0 1 : AN5 is selected
1 1 0 : AN6 is selected
1 1 1 : AN7 is selected
b4 b3
0 0 : One-shot mode
0 1 : Repeat mode
1 0 : Single sweep mode
1 1 : Repeat sweep mode 0
Repeat sweep mode 1
RW
ADST
A-D conversion start flag 0 : A-D conversion disabled
1 : A-D conversion started
CKS0
Frequency select bit 0
0 : fAD/4 is selected
1 : fAD/2 is selected
Note: If the A-D control register is rewritten during A-D conversion, the conversion result is
indeterminate.
A-D control register 1 (Note)
b7 b6 b5 b4 b3 b2 b1 b0
00
Symbol
ADCON1
Address
03D716
When reset
0016
Bit symbol
Bit name
SCAN0
A-D sweep pin select
bit
SCAN1
MD2
A-D operation mode
select bit 1
BITS
CKS1
8/10-bit mode select bit
Frequency select bit 1
VCUT
Vref connect bit
Must always be “0”.
Function
When single sweep and repeat sweep
mode 0 are selected
b1 b0
0 0 : AN0, AN1 (2 pins)
0 1 : AN0 to AN3 (4 pins)
1 0 : AN0 to AN5 (6 pins)
1 1 : AN0 to AN7 (8 pins)
When repeat sweep mode 1 is selected
b1 b0
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)
0 : Any mode other than repeat sweep
mode 1
1 : Repeat sweep mode 1
0 : 8-bit mode
1 : 10-bit mode
0 : fAD/2 or fAD/4 is selected
1 : fAD is selected
0 : Vref not connected
1 : Vref connected
RW
Note: If the A-D control register is rewritten during A-D conversion, the conversion result is
indeterminate.
Figure JA-2. A-D converter-related registers (1)
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