Intermec ED40 - Electrical Interface; Host Connector; Contact Assignment

Chapter 3 — Electrical Integration
16 ED40 Decode Board Integration Guide
Electrical Interface
This section provides electrical interface information for the host connector and
imager connector.
Host Connector
The host connector is a 12-contact ZIF connector used to connect the decode
board to the host.
Contact Assignment
Contact input and output directions are relative to the decode board.
Contact Assignment—Host Connector
Contact I/O Name Description Electrical Equivalent
1 - Vcc 3.0 V to 5.5 V
2Input/
output
RXD/USB D+ Serial input, receive from host/USB data plus.
3 Input Trigger 0 = Start reading session.
Reads, decodes, and sends information to the
host system.
1 = Stop reading session.
Stops reading and decoding.
4 Input Power Enable 0 = On (active idle).
1 = Off, except when writing setup parameters to
non-volatile memory.
To conserve power, set contact 4 to high when not
scanning. For more information, see “Power
Enable” on page 17.
5Input/
Output
TXD/USB D- Serial output, transmission to host/USB data
minus
6 Output RTS/NC Used to request permission from the host to
transmit on TXD line (RTS/CTS hardware
protocol).
7 - GND Ground
8 Input Detect in 1 Must be connected to Vcc for an RS-232
connection.
Must be connected to ground for a USB
connection.
9 Output LED Used to drive external LED.
Contact 9 does not provide enough current (4
mA) to drive the LED. You must add a transistor
between contact 9 and the LED. For more
information, see “LED” on page 18.
47K
47K
power
enable
Vcc in
47K
Vcc
Data in
47K
47K
Vcc in
Vcc
47K
Vcc
Data out
Enable
GND
Data in
100 K
Vcc in
Data out
Enable