M16C26 Datasheet, PDF (161/239 Pages) Renesas Technology Corp – 16-BIT CMOS SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/20 SERIES

Udenvdeelropment
Preliminary Specifications Rev.
Specifications in this manual are
A-D Converter
0.9
tentative
and
subject to change.
SINGLE-CHIP 16-BIT
M16C/26 Group
CMOS MICROCOMPUTER
A-D control register 0 (Note 1)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
ADCON0
Address When reset
03D616 00000XXX2
Bit symbol
Bit name
Function
CH0
CH1
CH2
MD0
MD1
TRG
Analog input pin select bit
A-D operation mode
select bit 0
Trigger select bit
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
0 : Software trigger
1 : ADTRG trigger
ADST
A-D conversion start flag 0 : A-D conversion disabled
1 : A-D conversion started
RW
(Note 2)
(Note 2)
CKS0 _{Frequency select bit}
Refer to table 1.16.2
Note 1: If the A-D control register is rewritten during A-D conversion, the conversion result is indeterminate.
Note 2: When changing A-D operation mode, set analog input pin again.
A-D control register 1 (Note 1)
b7 b6 b5 b4 b3 b2 b1 b0
Symbol
ADCON1
Address
03D716
When reset
0016
Bit symbol
Bit name
A-D sweep pin select bit
SCAN0
SCAN1
MD2
BITS
CKS1
A-D operation mode
select bit 1
8/10-bit mode select bit
Frequency select bit
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
Refer to table 1.16.2
VCUT
Vref connect bit
0 : Vref not connected
1 : Vref connected
Nothing is assigned.
In an attempt to write to these bits, write 0. The value, if read, turns out to be 0.
Note 1: If the A-D control register is rewritten during A-D conversion, the conversion result is indeterminate.
RW
Figure 1.16.2. A-D converter control registers (1)
Renesas Technology Corp.
155