Table of Contents
Advertisement
12-pin FFC Connector
The following table lists the pin functions of the 12-pin FFC connector.
Table 4-1
PIN#
Signal
1
NC
2
VDD
3
GND
4
RXD
5
TXD
6
USB_D+
7
USB_D-
8
NC
9
BUZZ
O,od
10
NC
11
NC
12
TRIG
※ I = Input; O = Output; od = Open Drain.
※ 1 This output signal can be used by an external beeper circuit to generate audible feedback to the user to indicate
power-on and good read statuses.
Power On beep: The BUZZ pin (PIN 9) produces a PWM output (duration: 350ms; frequency: 1.67~2.5khz, both
parameters are NOT user-programmable) 200ms after power-on. The beep can be programmed On or Off. To learn
how to program the parameter, please see the EM3080 V2 user guide.
Good Read beep: The BUZZ pin (PIN 9) produces a PWM output (default duration: 80ms; default frequency: 2.46Khz,
both parameters are user-programmable) when a good read occurs. The beep can be programmed On or Off. To learn
how to program these parameters, please see the EM3080 V2 user guide.
For the external beeper circuit design, please see the "Beeper Circuit" section in this chapter. If the BUZZ pin is not
used, leave it unconnected.
※ 2 This external trigger signal is level trigger.
A trigger pull (i.e. driving the TRIG pin low for over 10ms) activates a decode session. The decode session continues
until a barcode is decoded or the trigger is released.
For the external trigger circuit, please see the "Trigger Circuit" section in this chapter. If the TRIG pin is not used, leave
it unconnected.
I/O
-
-
-
Power-supply ground
I
TTL level 232 receive data
O
TTL level 232 transmit data
I/O
USB D+ differential data signal
I/O
USB D- differential data signal
-
-
-
I
Function
Unconnected
3.3V power supply
Unconnected
Beeper output
Unconnected
Unconnected
Trigger signal input
Remark
See Note 1
See Note 2
16
Advertisement
Table of Contents
