Advantech PCL-740 Specifikace stáhnout pdf (Strana 22)

Appendix A Register structure and format 19

BASE+1 Interrupt Status Register (ISR) when DLAB=0

bit 0 Enable received-data-available interrupt

bit 1 Enable transmitter-holding-register-empty

interrupt

bit 2 Enable receiver-line-status interrupt

bit 3 Enable modem-status interrupt

BASE+2 FIFO Control Register (FCR)

bit 0 Enable transmit and receive FIFOs

bit 1 Clear contents of receive FIFO

bit 2 Clear contents of transmit FIFO

bits 6-7 Set trigger level for receiver FIFO interrupt.

Bit 7 Bit 6 FIFO trigger level

0 0 01

0 1 04

1 0 08

1 1 14

BASE+3 Line Control Register (LCR)

bit 0 Word length select bit 0

bit 1 Word length select bit 1

Bit 1 Bit 0 Word length (bits)

0 0 5

0 1 6

1 0 7

1 1 8

bit 2 Number of stop bits

bit 3 Parity enable

bit 4 Even parity select

bit 5 Stick parity

bit 6 Set break

bit 7 Divisor Latch Access Bit (DLAB)

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 28 29

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Advantech PCL-740 Specifikace Strana 22