LAN91C96I_07 SMSC [SMSC Corporation], LAN91C96I_07 Datasheet - Page 63

• Manufacturer Part Number: LAN91C96I_07
• Description: Non-PCI Single-Chip Full Duplex Ethernet Controller
• Manufacturer: SMSC [SMSC Corporation]

Non-PCI Single-Chip Full Duplex Ethernet Controller
SMSC DS – LAN91C96I
Call ALLOCATE
Yes
TXEMPTY INTR
Call TX INTR or
Get Next TX
Call EPH
Transmission?
Available for
INTR
Packet
Figure 8.1 – Interrupt Service Routine
Yes
Save Bank Selec & Address
No
Read Interrupt Register
DATASHEET
Mask Interrupts
Ptr Registerst
Yes
INTR?
EPH
ISR
No
Restore Address Pointer &
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Bank Select Registers
Unmask Interrupts
ALLOC
INTR?
INTR?
TX
No
Exit ISR
No
No
Yes
INTR?
RX
CopyData & Source Address
Set "Ready for Packet" Flag
Return Buffers to Upper Layer
Disable Allocation Interrupt
Write Allocated Pkt# into
Write Ad Ptr Reg. &
Packet Number Reg.
Enqueue Packet
Yes
RXINTR
Call
Mask
Rev. 03-28-07