M16C26 Datasheet, PDF (162/239 Pages) Renesas Technology Corp – 16-BIT CMOS SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/20 SERIES

Udenvdeelropment
Preliminary Specifications Rev. 0.9
Specifications in this manual are tentative
A-D Converter
and
subject to change.
SINGLE-CHIP 16-BIT
M16C/26 Group
CMOS MICROCOMPUTER
A-D control register 2 (Note 1)
b7 b6 b5 b4 b3 b2 b1 b0
000
Symbol
ADCON2
Address
03D416
When reset
0016
Bit symbol
Bit name
SMP
A-D conversion method
select bit
Function
0 : Without sample and hold
1 : With sample and hold
RW
Reserved bits
Must always be set to 0
CKS2
Frequency select bit 2
Refer to table 1.16.2
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.
A-D register i
(b15)
b7
(b8)
b0 b7
Symbol
ADi(i=0 to 7)
Address
When reset
03C016 to 03CF16 Indeterminate
b0
Function
Eight low-order bits of A-D conversion result
During 10-bit mode
Two high-order bits of A-D conversion result
During 8-bit mode
When read, the content is indeterminate
Nothing is assigned.
In an attempt to write to these bits, write 0 . The value, if
read, turns out to be 0 .
Figure 1.16.3. A-D converter control registers (2)
Table 1.16.2. Operation clock fAD
CKS0 CKS1 CKS2
φ_AD
0
0
0
fAD/4
0
0
1
fAD/12
0
1
0
fAD
0
1
1
fAD/3
1
0
0
fAD/2
1
0
1
fAD/6
1
1
0
fAD
1
1
1
fAD/3
Note: Divide the fAD if f(XIN) exceeds 10MHZ, and make φAD
frequency equal to or less than 10MHZ.
RW
156
Renesas Technology Corp.