SMC Networks SMC91C95 Manual do Utilizador descarregar pdf (Página 77)

FIGURE 14 - TXEMPTY INTR

TXEMPTY INTR

Write Acknowledge Reg. with

TXEMPTY Bit Set

Read TXEMPTY & TX INTR

Acknowledge TXINTR

Re-Enable TXENA

Return to ISR

Issue "Release" Command

Restore Packet Number

TXEMPTY = 0

TXINT = 0

(Waiting for Completion)

TXEMPTY = X

TXINT = 1

(Transmission Failed)

TXEMPTY = 1

TXINT = 0

(Everything went through

successfully)

Read Pkt. # Register & Save

Write Address Pointer

Read Status Word from RAM

Update Statistics

Update Variables

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SMC Networks SMC91C95 Manual do Utilizador Página 77