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12-pin FPC Connector
The following table lists the pin functions of the 12-pin FPC connector.
Table 3-1
PIN#
Signal
1
NC
2
VIN
3
GND
4
RXD
5
TXD
6
USB_DN
7
USB_DP
8
NC
9
Buzz
10
LED
11
NRST
12
nTRIG
※ 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 nBEEPER pin produces a PWM output (duration: 400ms; frequency: 4184Hz.) 970ms after
power-on. The beep can be programmed On or Off. To learn how to program the parameter, please see the EM3296
V4 user guide.
Good Read beep: The nBEEPER pin produces a PWM output (default duration: 80ms; default frequency: 2730Hz)
when a good read occurs. The beep can be programmed On or Off. To learn how to program these parameters, please
see the EM3296 V4 user guide.
For the external beeper circuit design, please see the "Beeper Circuit" section in Chapter 5. If the nBEEPER pin is not
used, leave it unconnected.
※ 2 This output signal can be used by an external LED to indicate good read status.
The nGoodRead pin produces a high output (default duration: 20ms, user-programmable) when a good read occurs.
The Good Read LED can be programmed On or Off. To learn how to program these parameters, please see the
EM3296 V4 user guide.
For the external LED circuit design, please see the "Good Read LED Circuit" section in Chapter 5. If the nGoodRead
pin is not used, leave it unconnected.
I/O
-
Unconnected
-
3.3V power input
-
Power-supply ground
I
TTL level 232 receive data
O
TTL level 232 transmit data
USB_D- signal
-
-
USB_D+ signal
Unconnected
-
O,od
Beeper signal output
O,od
Good Read LED output
I
External reset signal
I
Trigger signal input
Function
Remark
see Note 1
see Note 2
Low level is valid.
see Note 3
14
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