Sensoray 626 - Manual (Page 19)

Sensoray Model 626 Instruction Manual 17
10.3 Block Diagram
Figure 6 - Block diagram of a counter pair
Counter A
Counter B
Input logic
&
Multiplier
En
coder Di
gita
l I
/O
In
te
rn
al
cloc
k
So
ftware
co
ntro
l
Input logic
&
Multiplier
E
ncoder
Di
gita
l I
/O
In
te
rn
al
cloc
k
So
ftware
co
ntro
l
Count Dir
ection Index
Pre-Load register A
Pre-Load register B
PCI Bus
Count A
Ov
erflo
w
Ov
erflo
w
A
Counter B
Counter B
Clear/Pre
-lo
ad
Count Dir
ection Index
Count B
Latch 1
In
put A
In
put B
Latch
A
Clear/Pre
-lo
ad
Ov
erflo
w
In
terru
pt
Captur
e
Register
B
In
terru
pt
Captur
e
Register
A
Combined Counter Interrupts
From
other
counter
interrupts
From
other
counter
interrupts
Latch
B