Users Manual Instruction Manual

6
CATC FIREINSPECTOR 2.01 CHAPTER 1
User’s Manual FireInspector Overview
1.4 External Interface Breakout Board
The External Interface Breakout Board,
shown in Figure 1-6, is an accessory that
allows convenient access to nine
potentially useful TTL output signals and
eight TTL input signals. Four ground and
one 5-volt pin are also provided. This
external breakout board also provides a
simple way for connecting logic analyzers
or other tools to the analyzer unit.
The breakout board connects, via a ribbon
cable, to the Data In/Out connector located
on the back of the analyzer box. Each pin is
isolated by a 100Ω series resistor and a
74F244 inside the analyzer box.
Signal descriptions for each of the available
pins on the External Interface Breakout
Board are listed in Table 1-2.
Table 1-2: External Interface Breakout Board – Pin Description
Pin Signal Description
1 GND Signal Ground
2 GND Signal Ground
3 5V 5V DC source, limited internally to 500mA (polyswitch fuse)
4 - Trigger Out Active-low TTL output
5 Not connected
6 I 0 Trigger/signal TTL input - programmable as active high or low
7 I 1 Trigger/signal TTL input - programmable as active high or low
8 I 2 Trigger/signal TTL input - programmable as active high or low
9 I 3 Trigger/signal TTL input - programmable as active high or low
10 I 4 Trigger/signal TTL input - programmable as active high or low
11 I 5 Trigger/signal TTL input - programmable as active high or low
12 I 6 Trigger/signal TTL input - programmable as active high or low
13 I 7 Trigger/signal TTL input - programmable as active high or low
14 O 0 Signal TTL output - programmable as pulse high/low or toggle
15 O 1 Signal TTL output - programmable as pulse high/low or toggle
16 O 2 Signal TTL output - programmable as pulse high/low or toggle
17 O 3 Signal TTL output - programmable as pulse high/low or toggle
18 O 4 Signal TTL output - programmable as pulse high/low or toggle
19 O 5 Signal TTL output - programmable as pulse high/low or toggle
20 O 6 Signal TTL output - programmable as pulse high/low or toggle
21 O 7 Signal TTL output - programmable as pulse high/low or toggle
R1
R2
R3
R4
R5
R6
R7
R8
R9
R10
R11
R12
R13
R14
R15
R16
R17
R18
R19
GND
GND
5V
Trigger Ou t
- - -
I0
I1
I2
I3
I4
I5
I6
I7
O0
O1
O2
O3
O4
O5
O6
O7
GND
GND
1
23
J1
FireInspector
Breakout Board
P1
Figure 1-6: External Interface Breakout Board