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