LAN91C100-FD Ver la hoja de datos (PDF) - SMSC -> Microchip

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LAN91C100-FD

FEAST Fast Ethernet Controller with Full Duplex Capability

SMSC -> Microchip 

FEAST Fast Ethernet Controller with Full Duplex Capability

ISR

Save Bank Select & Address

Ptr Registers

Mask SMC91C100FD

Interrupts

Read Interrupt Register

No

Yes

RX INTR?

Yes

Call TX INTR or TXEMPTY

TX INTR?

INTR

No

Call RXINTR

Get Next TX

Packet

Available for

Yes Transmission?

No

Call ALLOCATE

ALLOC INTR?

No

Yes

Write Allocated Pkt # into

Packet Number Reg.

Write Ad Ptr Reg. & Copy Data

& Source Address

Yes

Call EPH INTR

EPH INTR?

No

Restore Address Pointer &

Bank Select Registers

Unmask SMC91C100FD

Interrupts

Exit ISR

Enqueue Packet

Set "Ready for Packet" Flag

Return Buffers to Upper Layer

Disable Allocation Interrupt

Mask

Figure 5.3 - Interrupt Service Routine

SMSC DS – LAN91C100FD Rev. D

Page 45

DATASHEET

Rev. 01-20-06

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