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USB
The table below describes the pin functions of FPC connector used as USB interface.
PIN#
Signal Name
1
2
3
4
5
6
7
8
9
10
nGoodRead
11
12
I = Input; O = Output; od = Open Drain.
Micro USB
The Micro USB connector on the EM20 is a standard connector and can be used accordingly.
13
232INV
VIN
GND
D-
Reserved
D+
Reserved
PWRDWN
nBEEPER
nWAKE
nTrig
I/O
Output: High=TTL-232 interface; Low=USB
O
interface
-
Power: supply voltage input
-
Ground: power and signal ground
I/O
Input/Output: USB D- signal
O
Reserved
I/O
Input/Output: USB D+ signal
O
Reserved
Output: Active high, scan engine is in sleep
O
mode
O,od
Output-Open Drain: Beeper output
O,od
Output-Open Drain: Good read LED output
Input: Active low, wakes the engine from sleep
I
mode
Input: Active low, signal used as trigger input to
I
activate the engine to start a scan and decode
session
Function
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