Handler Interface (AT520) 23
6.
Handler
Interface
(AT520)
This chapter describes how to use the handler interface.
Pin Assignment
Circuit Diagram
Timing Chart
By using the handler interface, you can output the measurement completion signal (EOC),
the screening result of the comparator function (GD/NG/HI/IN/LO), and so on to
external devices from the AT520. You can also input the external trigger signal and the
comparator select signal to the AT520. With this interface and the comparator function,
you can build an automatic screening system composed of the AT520 and the handler.
6.1
Pin
Assignment
Table 6-1
Pin assignment
Table 6-2
Description of Handler Interface Input Signals
5
TRIG
External Trigger Signal
(Rising edge)
8 COMP.4
Comparator Record Selector.
(1 thru 30)
See Table 6-3
9 COMP.3
10 COMP.2
11 COMP.1
12 COMP.0
Table 6-3
Comparator Record Selection Truth Table
COMP
4-0
Record
COMP
4-0
Record
COMP
4-0
Record
COMP
4-0
Record
11111 No
change
10111 8 01111 16 00111 24
11110 1 10110 9 01110
17aa
00110 25
11101 2 10101 10 01101 18 00101 26
11100 3 10100 11 01100 19 00100 27
11011 4 10011 12 01011 20 00011 28
11010 5 10010 13 01010 21 00010 29
11001 6 10001 14 01001 22 00001 30
11000 7 10000 15 01000 23 00000 No
change
