Teledyne LeCroy Inspector - Users Manual - Manual (Page 11)

CATC CATC Inspector User’s Manual Version 2.31
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2.4 The External Interface Breakout Board
The breakout board is an Inspector accessory that allows convenient access to twelve potentially
useful output signals. It also provides a means to supply up to five inputs: one to act as an
(externally supplied) trigger, and four to sample user signals for display purposes. All signals use
TTL levels (0–5V). The following diagram illustrates the breakout board connector:
2.5 System setup
The Inspector is designed to work with either desktop or portable PCs. The PC does not have to
be equipped with a USB interface in order to work with the Inspector analyzer. Three steps are
involved in the setup of the system hardware: connecting to the parallel port, connecting to the
USB system under test, and connecting to electrical power.
GND Signal Ground
GND Signal Ground
–SUSPEND Suspend condition—Active Low Output
–RESUME Resume condition—Active Low Output
–RESET Reset condition—Active Low Output
–BAD CRC Bad CRC condition—Active Low Output
–BAD PID Bad PID condition—Active Low Output
–STUFF ERR Stuff Error condition—Active Low Output
–TRIGGER Trigger event detected—Active Low Output
–TRIGGERED Inspector triggered and saved data—Active Low Output
DRCLK Recovered USB clock [output]
RDATA Recovered USB data [binary output]
RSE0 Recovered SE0 signal [output]
–IDLE Bus Idle condition—Active Low Output
SPARE (unused)
SPARE (unused)
–EXT TRG External Trigger—Active Low Input
DX0 User Signal Data input #0—Normally Pulled High
DX1 User Signal Data input #1—Normally Pulled High
DX2 User Signal Data input #2—Normally Pulled High
DX3 User Signal Data input #3—Normally Pulled High
GND Signal Ground
GND Signal Ground