Kontron KTHM76-mITX Manual do Utilizador descarregar pdf (Página 46)

KTQM77 – KTHM76 Users Guide

KTD-N0850-F Page 46

6.8 Serial COM1 – COM4 Ports (J15, J16, J17, J18)

Four RS232 serial ports are available on the KTQM77.

The typical definition of the signals in the COM ports is as follows:

Signal Description

TxD

Transmitted Data, sends data to the communications link. The signal is set to the marking

state (-12V) on hardware reset when the transmitter is empty or when loop mode operation is

initiated.

RxD Received Data, receives data from the communications link.

DTR

Data Terminal Ready, indicates to the modem etc. that the on-board UART is ready to

establish a communication link.

DSR Data Set Ready, indicates that the modem etc. is ready to establish a communications link.

RTS

Request To Send, indicates to the modem etc. that the on-board UART is ready to exchange

data.

CTS Clear To Send, indicates that the modem or data set is ready to exchange data.

DCD Data Carrier Detect, indicates that the modem or data set has detected the data carrier.

Ring Indicator, indicates that the modem has received a ringing signal from the telephone line.

The pinout of Serial ports COM1 (J15), COM2 (J16), COM3 (J17) and COM4 (J18) is as follows:

Note

Ioh/Iol

Type

Signal

Type

Ioh/Iol

Note

DCD

DSR

RxD

RTS

TxD

CTS

DTR

PWR

GND

PWR

Note 1: The COM1, COM2, COM3 and COM4 5V supply is fused with common 1.1A resettable fuse.

DB9 adapter cables (PN 821016 200mm long and 821017 100mm long) are available for implementing

standard COM ports on chassis.

Available cable kit (DB9 adapter cables):

PN 821017 - 100 mm or PN 821016 - 200 mm

Internal Connectors

1 2 ... 41 42 43 44 45 46 47 48 49 50 51 ... 139 140

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