Renesas M16C/60 Series Hardware Manual page 199

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M16C/6N5 Group
A-D control register 2 (Note 1)
b7 b6 b5 b4 b3 b2
0
Note 1: If the ADCON2 register is rewritten during A-D conversion, the conversion result will be indeterminate.
Note 2: The φ frequency must be 10 MHz or less. The selected φ
AD
ADCON0 register's CKS0 bit, ADCON1 register's CKS1 bit, and ADCON2 register's CKS2 bit.
CKS0
0
0
0
0
1
1
1
1
A-D register i (i = 0 to 7)
(b15)
b7
Figure 1.16.3 ADCON2 Register, and AD0 to AD7 Registers
Rev.1.00 2003.05.30 page 185
b1 b0
Symbol
ADCON2
Bit symbol
A-D conversion method
SMP
select bit
ADGSEL0
A-D input group select bit
ADGSEL1
-
Reserved bit
(b3)
Frequency select bit 2
CKS2
- Nothing is assigned. When write, set to "0".
(b7-b5)
When read, their contents are "0".
CKS1 CKS2
0 0 Divide-by-4 of f
0 1 Divide-by-2 of f
1 0
f
AD
1 1
0 0 Divide-by-12 of f
0 1
Divide-by-6 of f
1 0
Divide-by-3 of f
1 1
(b8)
b0 b7
When the ADCON1 register's
BITS bit is "1" (10-bit mode)
Low-order 8 bits of
A-D conversion result
High-order 2 bits of
A-D conversion result
Nothing is assigned. When write, set to "0".
When read, their contents are "0".
Address After reset
03D4 00
16
Bit name
0 : Without sample and hold
1 : With sample and hold
b2 b1
0 0 : Port P10 group is selected
0 1 : Must not be set
1 0 : Port P0 group is selected
1 1 : Port P2 group is selected
Set to "0"
0 : Selects f
divide-by-4 of f
1 : Selects divide-by-3 of f
(Note 2)
of f
AD
frequency is determined by a combination of the
AD
φ
AD
AD
AD
AD
AD
AD
Symbol
AD0 03C1
AD1 03C3
AD2 03C5
AD3 03C7
AD4 03C9
AD5 03CB
b0
AD6
03CD
AD7 03CF
Function
When the ADCON1 register's
BITS bit is "0" (8-bit mode)
A-D conversion result
When read, the content is
indeterminate.
A-D Converter
16
Function
, divide-by-2 of f , or
AD AD
.
AD
, divide-by-6
AD
, or divide-by-12 of f .
AD
Address After reset
to 03C0 Indeterminate
16 16
to 03C2 Indeterminate
16 16
to 03C4 Indeterminate
16 16
to 03C6 Indeterminate
16 16
to 03C8 Indeterminate
16 16
to 03CA Indeterminate
16 16
Indeterminate
to 03CC
16 16
to 03CE Indeterminate
16 16
RW
RW
RW
RW
RW
RW
-
RW
RO
RO
-