Datasheet

Non-PCI Single-Chip Full Duplex Ethernet Controller with Magic Packet

Datasheet

Revision 1.0 (10-24-08) Page 74 SMSC LAN91C96 5v&3v

DATASHEET

Figure 8.5 – Driver Send and Allocate Routines

ALLOCATE

Issue "Allocate Memory"

Command to MMU

Read Interrupt Status Register

Enqueue Packet

Set "Ready for Packet" Flag

Return

Copy Remaining TX Data

Packet into RAM

Return Buffers to Upper Layer

Write Allocated Packet into

Packet # Register

Write Address Pointer

Copy Part of TX Data Packet

into RAM

Write Source Address into

Proper Location

Store Data Buffer Pointer

Clear "Ready for Packet" Flag

Enable Allocation Interrupt

Allocation

Passed?

Ye s N o

DRIVER SEND

Choose Bank Select

Call ALLOCATE

Exit Driver Send

Read Allocation Result