3
Host Interface Connector
Host Interface Connector Pin Out
The interface connector is a CviLux Corporation 0.5mm vertical surface mount FFC/FPC connector.
PIN
TTL level 232
I/O
USB
I/O
1
232INV
I
NC
-
2
VIN
-
VIN
-
3
GND
-
GND
-
4
RXD
I
D-
I/O
5
TXD
O
Reserved
-
6
CTS
I
D+
I/O
7
RTS
O
Reserved
-
8
PWRDWN
O,od
PWRDWN
O,od
9
nBEEPER
O,od
nBEEPER
O,od
10
nGoodRead
O,od
nGoodRead
O,od
11
nWake
I
nWake
I
12
nTrig
I
nTrig
I
I=Input,O=Output,od=Open Drain
Host Interface Signal Descriptions
Warning: Do not connect a flex strip to the host interface connector when power is present on the flex strip. Damage to the
image could result.
TTL Level 232
Signal
Description
232INV
Reserved
VIN
Power-Supply voltage input
GND
Power-Supply and signal ground
RXD
Input-TTL level 232 receive data
TXD
Output-TTL level 232 transmit data
CTS
Input-TTL level 232 clear to send signal
RTS
Output-TTL level 232 request to send
PWRDWN
Output-Open Drain; 10K Pull up; active high indicator that EM2037 is in power down mode.
nBEEPER
Output – Open Drain; idle high signal that can be an active low DC or PWM controlled AC signal used to drive
anexternal beeper.
nGoodRead
Output – Open Drain; active low signal for driving a low current Good Read LED circuit.
nWake
Input, 100K Pull up – When in power down mode active low wake up signal to the EM2037.
nTrig
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.
