LAN91C111-NU Standard Microsystems (SMSC), LAN91C111-NU Datasheet - Page 88

• Manufacturer Part Number: LAN91C111-NU
• Manufacturer: Standard Microsystems (SMSC)

Specifications of LAN91C111-NU

• Operating Supply Voltage (typ): 3.3V
• Operating Supply Voltage (min): 3.135V
• Operating Supply Voltage (max): 3.465V
• Operating Temperature Classification: Commercial
• Mounting: Surface Mount
• Pin Count: 128
• Lead Free Status / RoHS Status: Compliant

10/100 Non-PCI Ethernet Single Chip MAC + PHY
Datasheet
ISR
Save Bank Select & Address
Ptr Registers
Mask SMC91C111
Interrupts
Read Interrupt Register
No
Yes
RX INTR?
Yes
TX INTR?
Call TX INTR or TXEMPTY
INTR
No
Call RXINTR
Get Next TX
ALLOC INTR?
Packet
No
Yes
Available for
Transmission?
Write Allocated Pkt # into
Yes
No
Packet Number Reg.
Call ALLOCATE
Write Ad Ptr Reg. & Copy Data
& Source Address
Enqueue Packet
EPH INTR?
Yes
No
Set "Ready for Packet" Flag
Call EPH INTR
Return Buffers to Upper Layer
Disable Allocation Interrupt
Mask
MDINT?
Yes
Restore Address Pointer &
Bank Select Registers
Call MDINT
Unmask SMC91C111
Interrupts
Exit ISR
Figure 10.1 Interrupt Service Routine
Revision 1.91 (06-01-09)
88
SMSC LAN91C111 REV C
DATASHEET