Teledyne LeCroy USB Chief - Users Manual - Manual (Page 124)

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Merlin Protocol Analyzer User’s Manual CATC Version 1.7
Table 5: External Interface Breakout Board: Pin Description
You can use pins 6-10 on the Breakout Board as Trigger Inputs for the Analyzer
from your hardware. If you hook up any of these pins, you must check the
corresponding Trigger Input number in this Recording Options Event Group to
enable it as a Trigger.
You can enable or disable Trigger Inputs 0 through 4 from the Breakout Board.
These inputs may also be set as Active-Low or Active-High signals.
Note When you use the Active-High setting, the Analyzer internally pulls up the
Trigger input signals on the Breakout Board. Your External Trigger source
should drive the input signal low before starting to record or the Analyzer
immediately detects a Trigger Event because of the signal pull-ups.
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 SPARE Not connected
6 IN 0 Trigger/signal TTL input—programmable as active high or low
7 IN 1 Trigger/signal TTL input—programmable as active high or low
8 IN 2 Trigger/signal TTL input—programmable as active high or low
9 IN 3 Trigger/signal TTL input—programmable as active high or low
10 IN 4 Trigger/signal TTL input—programmable as active high or low
11 TRIGGER IN Trigger input—programmable as active high or low
12 RESERVED 1 Reserved for future enhancement
13 RESERVED 2 Reserved for future enhancement
14 OUT 0 Signal TTL output—programmable as pulse high/low or toggle
15 OUT 1 Signal TTL output—programmable as pulse high/low or toggle
16 OUT 2 Signal TTL output—programmable as pulse high/low or toggle
17 OUT 3 Signal TTL output—programmable as pulse high/low or toggle
18 OUT 4 Signal TTL output—programmable as pulse high/low or toggle
19 OUT 5 Signal TTL output—programmable as pulse high/low or toggle
20 GATED VP USB D+ signal—output after buffering
21 GATED VM USB D- signal—output after buffering
22 GND Signal Ground
23 GND Signal Ground
BP
1
CURRENT MEASURE
+ Banana plug for optionally measuring the current of the USB Device
connected to the Record & Generate port of the Analyzer
BP
2
CURRENT MEASURE
– Banana plug for optionally measuring the current of the USB Device
connected to the Record & Generate port of the Analyzer
n/a 9 by 31 plated through
holes Prototype rework area; Top row connected to +5V; Bottom row
connected to GND; Remaining holes are not connected