Connect-tech PCIE/104 Manual do Utilizador descarregar pdf (Página 17)

Connect Tech Xtreme/SBC PCIe/104 Single Board Computer and PCIe/104 Qseven Carrier Board - User Manual

Revision 0.02

Serial

Description

Two RS232 serial ports are provided on P9 and two RS485 serial ports are provided on P11.

For the RS485 ports, the default configuration is full duplex without any bias or termination. Various

resistors configurations can be populated to enabled TX and RX termination as well as RTS control. The

following diagram shows the available configuration options. Contact Connect Tech’s support department

for further information.

Resistor

Function

Default

R99

Always enable driver

Populated

R101

Always enable receiver

Populated

R156

RTS controlled receiver

R160

RTS controlled driver

R98

Receiver termination

R102

Driver termination

R100

Receiver bias

R97

Receiver bias

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Connect-tech PCIE/104 Manual do Utilizador Página 17