2 configuration of a/d converter, Configuration of a/d converter, Block diagram of the a/d converter – FUJITSU F2MC-8L F202RA User Manual
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CHAPTER 12 A/D CONVERTER
12.2
Configuration of A/D Converter
The A/D converter consists of the following nine blocks.
• Clock selector (input clock selector for activation of A/D conversion)
• Analog channel selector
• Sample hold circuit
• D/A converter
• Comparator
• Control circuit
• A/D data register (ADDH and ADDL)
• A/D control register 1 (ADC1)
• A/D control register 2 (ADC2)
■
Block Diagram of the A/D Converter
Figure 12.2-1 Block Diagram of the A/D Converter
RE
S
V4 RE
S
V
3
ADCK
ADIE RE
S
V2
EXT
RE
S
V1
AN
S
2
AN
S
1 AN
S
0
ADI
ADMV RE
S
V0
AD
TO
F
CH
(ADDH,ADDL)
IRQ
8
A/D control regi
s
ter 2 (ADC2)
TO
(o
u
tp
u
t of
a
n
8
/16-
b
it timer)
(o
u
tp
u
t of
a
time-
bas
e
timer)
2
8
/F
CH
Clock
s
elector
An
a
log
ch
a
nnel
s
elector
Sa
mple
hold
circ
u
it
Comp
a
r
a
tor
Control circ
u
it
Inter
n
a
l d
a
t
a
bu
s
A/D d
a
t
a
regi
s
ter
D/A
converter
A/D control regi
s
ter 1 (ADC1)
: O
u
tp
u
t of
a
n
8
/16-
b
it c
a
pt
u
re timer/co
u
nter
: O
s
cill
a
tion
P0
3
/INT2
3
/AN7
P02/INT22/AN6
P01/INT21/AN5
P00/INT20/AN4
P4
3
/AN
3
P42/AN2
P41/AN1
P40/AN0