M16C6K7 Datasheet, PDF (134/285 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

Rev.1.0
A-D Converter
Mitsubishi microcomputers
M16C / 6K7 Group
SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER
(4) Repeat sweep mode 0
In repeat sweep mode 0, the pins selected using the A-D sweep pin selection bits are used for repeat sweep
A-D conversion. Table.JA-5 shows the specifications of repeat sweep mode 0. Fig.JA-7 shows the A-D
control register in repeat sweep mode 0.
Table.JA-5 Repeat sweep mode 0 specifications
Item
Function
Specification
The pins selected by the A-D sweep pin selection bits are used for repeat sweep A-D conversion
Start condition
Stop condition
Writing “1” to A-D conversion start flag
Writing “0” to A-D conversion start flag
Interrupt request generation timing
Input pin
Reading of result of A-D converter
Not generated
AN0 and AN1 (2 pins), AN0 to AN3 (4 pins), AN0 to AN5 (6 pins), or AN0 to AN7 (8 pins)
Read A-D registers corresponding to selected pins (at any time)
A-D control register 0 (Note)
b7 b6 b5 b4 b3 b2 b1 b0
11
Symbol
ADCON0
Address
03D616
When reset
00000XXX2
Bit symbol
Bit name
Function
CH0
Analog input pin selection bits Invalid in repeat sweep mode 0
RW
CH1
CH2
MD0
MD1
b4 b3
A-D operation mode selection _{1 1 : Repeat sweep mode 0}
bits 0
TRG
Trigger selection bit
0 : Software trigger
1 : ADTRG trigger
ADST ^{A-D conversion start flag}
0 : A-D conversion disabled
1 : A-D conversion started
CKS0 ^{Frequency selection 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 1)
b7 b6 b5 b4 b3 b2 b1 b0
1
0
Symbol
ADCON1
Address
03D716
When reset
0016
Bit symbol
Bit name
Function
RW
SCAN0
SCAN1
A-D sweep pin selection bits 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)
MD2
BITS
CKS1
A-D operation mode
selection bits 1
8/10-bit mode selection bit
Frequency selection bit 1
Should be "0" in this mode
0 : 8-bit mode
1 : 10-bit mode
0 : fAD/2 or fAD/4 is selected
1 : fAD is selected
VCUT Vref connect bit
1 : Vref connected
OPA0
OPA1
ANEX0,1 selection bis
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 : Inhibited
Note 1: If the A-D control register is rewritten during A-D conversion, the conversion result
is indeterminate.
Fig.JA-7 A-D conversion register in repeat sweep mode 0
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