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27
Appendix B. Block Diagram
P C I B U S
ADD
RE
SS
, CON
T
R
O
L
AND D
A
T
A
B
U
S
P C I IN T E R F A C E
3 2 -B IT M U L T I-M O D E
U P /D O W N C O U N T E R
3 2 -B IT M U L T I-M O D E
U P /D O W N C O U N T E R
C
O
N
T
ROL
UN
IT
3 2 -B IT M U L T I-M O D E
U P /D O W N C O U N T E R
3 2 -B IT
U P /D O W N
C O U N T E R
C O U N T E R
M O D E
C O N T R O L
D IG IT A L
F IL T E R
P R O G R A M M A B L E
T IM E -B A S E
G E N E R A T O R
D
IF
F
/S
E
IS
O
L
A
T
IO
N
IN
P
U
T
C
IR
C
U
IT
D O /I C H .0
D O /I C H .1
D O /I C H .2
D O /I C H .3
IN T E R R U P T C O N T R O L L E R
C H .0 IN D E X
C H .0 P H A S E A
C H .0 P H A S E B
C H .1 IN D E X
C H .1 P H A S E A
C H .1 P H A S E B
C H .2 IN D E X
C H .2 P H A S E A
C H .2 P H A S E B
C H .3 IN D E X
C H .3 P H A S E A
C H .3 P H A S E B