2.3
UART
Connectors
&
Debug
Port
There are 3 UART ports (UART0, 4, 5) on EC1403/04 and 2 UART ports (UART0, UART4)
on EC1407/08/10. The connector type and functions are described in the table below:
UART
No
Connector
Type
Available
Signals
Note
UART0 2x4
box
header
RS232 signal level
(TX, RX, RTS, CTS)
RS232 port.
UART4 2x4
box
header
RS485 signal level
(485+, 485-)
RS485 port.
Note: RS485 port works only
in HALF Duplex mode.
UART5 2x4
box
header
RS232 signal level
(TX, RX, RTS, CTS)
RS232 port.
Note: EC1403/EC1404 only.
One 2x4 box header to DB9 cable is included in the product package. See Appendix A
for the detailed info of cable pin assignment.
2x4 Box Header:
DB9
Pin
2x4
header
RS232
RS485
1
--
---
---
2
4
RxD
485+
3
6
TxD
485-
4
1
---
---
5
5
GND
GND
6
7
---
---
7
8
RTS
---
8
2
CTS
---
9
--
---
---
DB9
Male
Connector
DB9
Female
Connector
1
2
1 2 3 4 5
6 7 8 9
5 4
3 2 1
9 8 7
6
7
8
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