AM79C961AVIW AMD (ADVANCED MICRO DEVICES), AM79C961AVIW Datasheet - Page 198
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AM79C961AVIW
Manufacturer Part Number
AM79C961AVIW
Description
Manufacturer
AMD (ADVANCED MICRO DEVICES)
Datasheet
1.AM79C961AVIW.pdf
(206 pages)
Specifications of AM79C961AVIW
Operating Supply Voltage (typ)
5V
Operating Supply Voltage (min)
4.75V
Operating Supply Voltage (max)
5.25V
Operating Temperature Classification
Industrial
Mounting
Surface Mount
Pin Count
144
Lead Free Status / Rohs Status
Not Compliant
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N2:EOM
Ethernet
N0: Packet preamble, SFD
activity:
Wire
and destination address
are arriving.
C10: ERP interrupt
C9: Controller writes descriptor #3.
C8: Controller is performing intermittent
C7: Controller writes descriptor #2.
C6: "Last chance" lookahead to
C5: Controller is performing intermittent
C4: Lookahead to descriptor #3 (OWN).
C3: SRP interrupt is
C2: Controller writes descriptor #1.
C1: Controller is performing intermittent
C0: Lookahead to descriptor #2.
bursts of DMA to fill data buffer #3.
descriptor #3 (OWN).
bursts of DMA to fill data buffer #
generated.
bursts of DMA to fill data buffer #1
{
is generated.
N1: 64th byte of packet
data arrives.
Figure 3. LAPP TImeline for TWO-INTERRUPT Method
}
}
Controller
Ethernet
activity:
2
.
Am79C961A
Buffer
Buffer
Buffer
#3
#2
#1
S10: Driver sets up TX descriptor.
S9: Application processes packet, generates TX packet.
S8A: Interrupt latency.
S7: Driver is swapped out, allowing a non-Ethernet
S6: Driver copies data from buffer #2 to the application
S5: Driver polls descriptor #2.
S4: Driver copies data from buffer #1 to the application
S1: Interrupt latency.
S0: Driver is idle.
application to run.
buffer.
buffer.
Software
activity:
}
}
S3: Driver writes modified application
S2: Driver call to application to
pointer to descriptor #3.
get application buffer pointer.
}
}
S8: Driver calls application
S 7A: Driver Interrupt Service
to tell application that
packethas arrived.
Routine executes
RETURN.
19364B-89
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