Eport Pro-EP20/EP20-PIN Serial Server User Manual
Shanghai High-Flying Electronics Technology Co., Ltd
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2.2. Pins Definition
Figure 3.
Eport Pro-EP20 Series Pins Map
Table2.
Eport Pro-EP20 Series Pins Definition
Pin
DES3cribtion
Net Name Signal Type
Comments
1
GPIO
GPIO1
I/O
Can be configured to UART1:TXD2
2
GPIO
GPIO2
I/O
Can be configured to UART1:RXD2
3
UART0
CTS
O
Can be configured to GPIO
4
External Reset In
nRST
I, PU
“Low” effective reset input.
5
UART0
RTS
I
Can be configured as RS485 control
pin
6
Multi-Function Pin
nReload
I,PU
Detailed functions see <Notes>
7
LED indicator
LED2_Data
O
Detailed functions see <Notes>
8
UART0
RXD
I
3.3V, TTL.
9
UART0
TXD
O
3.3V, TTL.
10
Ground
GND
GND
Power Ground
11
+3.3V Power
DVDD
Power
+3.3V
12
LED indicator
LED1_Link
O
Detailed functions see <Notes>
EGND
EGND
EGND
EGND
Earth GND, Used to shield EMC signal.
Connect to Ethernet Metal Shell
Internally.
It is not allowed to connect to GND.
<Notes>
nReload Pin function:
1.
Put this pin low before the device powered on (or Reset), This device works in mass
production mode to upgrade its firmware, this mode is used for upgrade customized
firmware.
The corresponding PC tools can be download on High Flying website.
2.
After device is powered up, If put this pin to low more than 3 seconds and then put to High,
It will restore the product parameters to factory setting.
We strongly suggest user to fan out this pin.
LED2_Data Pin
