DM560P 查看數據表（PDF） - Davicom Semiconductor, Inc.

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DM560P

V.90 Integrated Data/Fax/Voice/Speakerphone Modem Device Set

Davicom Semiconductor, Inc. 

DM560P

V.90 Integrated Data/Fax/Voice/Speakerphone Modem Device Set

Interrupt Identification Register (IIR): Address 2 (continued)

D3 D2 D1 D0 Priority Level Interrupt Type

Condition

Reset

00 0 1 -

-

-

-

0 1 1 0 Highest

Receiver Line Overrun Error, Parity Error, Reads the Line Status

Status

Framing Error or Break Register

Interrupt

0 1 0 0 Second

Receiver Data Receiver Data Available or Reads the Receiver Buffer

Available

Trigger Level Reached

Register or the FIFO has

Dropped Below the

threshold value

1 1 0 0 Second

Character Timeout No characters have been Reads The Receiver Buffer

Indication

read from or written to the Register

Rx FIFO during

programming time interval,

and the Rx FIFO is not

empty

0 0 1 0 Third

Transmitter

Ready to accept new data Reads the IIR Register or (if

Holding Register for transmission

source of interrupt) Writes

Empty

To The Transmitter Holding

Register

0 0 0 0 Fourth

Modem Status Clear to Send, Data Set Reads the Modem Status

Ready, Ring Indicator or Register

Data Carrier Detected

12

Preliminary

Version: DM560P-DS-P07

August 11, 2000

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