A16450 Ver la hoja de datos (PDF) - Altera Corporation

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Fabricante

A16450

Universal Asynchronous Receiver/Transmitter

Altera Corporation 

a16450 Universal Asynchronous Receiver/Transmitter Data Sheet

Table 4. Interrupt Identification Register Format Note (1)

Bit 0 Bit 1 Bit 2 Bits 7..3 Interrupt Type Interrupt Source

Reset Mechanism Priority

1

X

X

0

0

1

1

0

0

0

1

0

0

1

0

0

0

0

0

0

Note:

(1) The X indicates “don’t care.”

No interrupt

–

–

–

Receiver line Overrun, parity, or Read the receiver line Highest

status

framing errors; break status register

interrupt

Receiver data Receiver data

Read the receiver

2

available

available

buffer

Transmitter

Transmitter holding Read the interrupt ID 3

holding register register empty

empty

register or write to the

transmitter holding

register

Modem status cts, dsr, ri, or dcd Read the modem

4

change state

status register

Line Control Register

The line control register sets the data and communication formats used by

the a16450. See Table 5.

72

Altera Corporation

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