Manual

KTD-S0051-D Page 23 Serial Interface
KTAM3874/pITX User's Guide
10.3 RS422/RS485 Interface
UART5 allows the switching between RS-232, RS-422 and RS-485. The differential signaling interface
modifies the pin assingment of J1300 (5 pins) as follows:
Header Pin Signal Description Type
1 TXD- Transmit data (negative) DSO
2 RXD- Receive data (negative) DSI
3 TXD+ Transmit data (positive) DSO
4 RXD+ Receive data (positive) DSI
5 GND Ground PWR
ATTENTION
The board placement of RS-422/-485 termination resistors is not supported.
10.4 UART5 Configuration
Full Duplex RS-232
1
Rx
Tx
J1300
ISL3330
GP3[16] GP3[17]
Mode
Receive
Transmit
0
0
X
X
TXD
RXD
RTS
CTS
B
A
Y
Z
Full Duplex RS-422
1
Rx
Tx
J1300
I
S
L3330
1
1
GP3[16] GP3[17]
Mode
Receive
Transmit
0
0