13
5
TXD
O
Output-TTL level 232 transmit data
6
nCTS
I
Input-TTL level 232 clear to send signal
7
nRTS
O
Output-TTL level 232 request to send signal
8
PWRDWN
O
Output-Open Drain; 10K Pull up; active high indicator that
EM2037 is in power down mode.
9
nBEEPER
O,od
Output
– Open Drain; idle high signal that can be an active low
DC or PWM controlled AC signal used to drive an external
beeper.
10
nGoodRead
O,od
Output
– Open Drain; active low signal for driving a low current
Good Read LED circuit.
11
nWAKE
I,
Input, 100K Pull up
– When in power down mode active low
wake up signal to the EM2037.
12
nTRIG
I
Input, Weak Pull up
– signal can be used a trigger input to the
EM2037 to indicate trigger depressed and when programmed
for host notify mode.
I = Input; O = Output; od = Open Drain;
USB
When 12 PIN-FPC is set for USB interface, the definitions for 12 PINs are as below:
PIN#
Signal
I/O
Description
1
Reserved
-
Reserved
2
VIN
-
Power-Supply voltage input
3
GND
-
Power-Supply and signal ground
4
D-
I/O
USB D-signal
5
Reserved
O
Reserved
6
D+
I/O
USB D+signal
7
Reserved
O
Reserved
8
PWRDWN
O
Output-Open Drain; 10K Pull up; active high indicator that
EM2037 is in power down mode.
9
nBEEPER
O,od
Output
– Open Drain; idle high signal that can be an active
