Hardware manual

Rev. 3.0, 09/98, page 228 of 361
11.1.2 Block Diagram
Internal
data bus
ADCR
ADCSR
ADDRA
ADDRB
ADDRC
ADDRD
Legend:
: A/D Control Register (8 bits)
: A/D Control/Status Register (8 bits)
: A/D Data Register A (8 bits)
: A/D Data Register B (8 bits)
: A/D Data Register C (8 bits)
: A/D Data Register D (8 bits)
Module data bus
Bus interface
8 Bit
D/A
Control circuit
Comparator
Sample and
hold circuit
AV
CC
AV SS
AN 0
+
-
AN
1
AN 2
AN 3
AN 4
AN 5
AN 6
Ø/8
Ø/16
ADI
Interrupt signal
AN 7
ADTRG
A
D
C
R
A
D
C
S
R
A
D
D
R
D
A
D
D
R
C
A
D
D
R
B
A
D
D
R
A
Successive approximations
register
Analog
multi-
plexer
Figure 11.1 Block Diagram of A/D Converter