Renesas M16C Series User Manual page 118

M30240 Group
V
REF
AV
SS
Addresses
(03C1
16
(03C3
16
(03C5
16
(03C7
16
(03C9
16
(03CB
16
(03CD
16
(03CF
16
AN
0
AN
1
AN
2
AN
3
AN
4
AN
5
AN
6
AN
7
Figure 1.96: Block diagram of A-D converter
Rev.1.00 Sep 24, 2003 Page 100 of 360
f
AD
1/2
VCUT=0
Resistor ladder
VCUT=1
Successive conversion register
, 03C0 )
A-D register 0(16)
16
, 03C2 )
A-D register 1(16)
16
, 03C4 )
A-D register 2(16)
16
, 03C6 )
A-D register 3(16)
16
, 03C8 )
A-D register 4(16)
16
, 03CA )
A-D register 5(16)
16
, 03CC )
A-D register 6(16)
16
, 03CE )
A-D register 7(16)
16
Data bus high-order
Data bus low-order
CKS0=1
1/2
CKS0=0
A-D control register 1 (address 03D7
A-D control register 0 (address 03D6
CH2,CH1,CH0=000
CH2,CH1,CH0=001
CH2,CH1,CH0=010
CH2,CH1,CH0=011
CH2,CH1,CH0=100
CH2,CH1,CH0=101
CH2,CH1,CH0=110
CH2,CH1,CH0=111
A-D Converter
CKS1=1
φ
AD
A-D conversion rate
CKS1=0
selection
)
16
)
16
V
ref
Decoder
Comparator
V
IN