DM9008 Ver la hoja de datos (PDF) - Davicom Semiconductor, Inc.

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DM9008

ISA/Plug & Play Super Ethernet Contoller

Davicom Semiconductor, Inc. 

Interrupt Mask Register (IMR)

The Interrupt Mask Register is used to mask interrupts. Each

interrupt mask bit corresponds to a bit in the Interrupt Status

Register (ISR). If an interrupt mask bit is set, an interrupt will be

DM9008

ISA/Plug & Play Super Ethernet Contoller

issued whenever the corresponding bit in the ISR is set. If any

bit in the IMR is set low, an interrupt will not occur when the bit

in the ISR is set. The IMR powers up all zeroes.

7

--

6

RDCE

5

CNTE

4

OVWE

3

TXEE

2

RXEE

1

PTXE

0

PRXE

Bit

Symbol

Description

D0

PRXE PACKET RECEIVED INTERRUPT ENABLE

Enables interrupt when packet is received

D1

PTXE PACKET TRANSMITTED INTERRUPT ENABLE

Enables interrupt when packet is transmitted

D2

RXEE RECEIVE ERROR INTERRUPT ENABLE

Enables interrupt when packet is received with error

D3

TXEE

TRANSMIT ERROR INTERRUPT ENABLE

Enables interrupt when packet transmission results in error

D4

OVWE OVERWRITE WARNING INTERRUPT ENABLE

Enables interrupt when Buffer Management Logic lacks sufficient buffers to store

incoming packet

D5

CNTE COUNTER OVERFLOW INTERRUPT ENABLE

Enables interrupt when MSB of one or more of the Network Tally counters has been set

D6

RDCE DMA COMPLETE INTERRUPT ENABLE

Enables interrupt when Remote DMA transfer has been completed

D7

--

Reserved

Final

21

Version: DM9008-DS-F02

November 30, 2000

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