Quatech Asynchronous Communications Adapter for PCI bus DSCLP/SSCLP-100 Manuel d'utilisateur télécharger pdf (Page 18)

4.4 Quatech Modem Control Register

The Quatech Modem Control Register can be used to set up each port. To

access the QMCR write a 0xBF to the LCR (base + 3) and a 0x10 to the Options

QMCR of the entire DSCLP-200/300 is shown in Figure 9a.

00 - TXEN “Auto”

01 - TXEN=DTR

10 - TXEN=RTS

11 - TXEN TOGGLES DURING X-MIT

1-0

0 - AUXOUT=RTS

1- AUXOUT=TCLK

0 - RCLK=TCLK,CTS=AUXIN

1 - RCLK=AUXIN, CTS=RTS

0 - Bits 2 and 3 are used

1 - RCLK=TCLK,CTS=RTS,

AUXOUT=AUXIN

0 - RXEN=1

1 - RXEN=!TXEN

0 (always 0)6

0 (always 0)7 (MSB)

DescriptionBit

Figure 9a --- Quatech Modem Control Register

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Quatech Asynchronous Communications Adapter for PCI bus DSCLP/SSCLP-100 Manuel d'utilisateur Page 18