AM79C978A AMD [Advanced Micro Devices], AM79C978A Datasheet - Page 240
![no-image](/images/no-image-200.jpg)
AM79C978A
Manufacturer Part Number
AM79C978A
Description
Single-Chip 1/10 Mbps PCI Home Networking Controller
Manufacturer
AMD [Advanced Micro Devices]
Datasheet
1.AM79C978A.pdf
(256 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
AM79C978AKC/W
Manufacturer:
AMD
Quantity:
20 000
Company:
Part Number:
AM79C978AKCW
Manufacturer:
AMD
Quantity:
6 605
- Current page: 240 of 256
- Download datasheet (4Mb)
B-4
N2:EOM
Ethernet
activity:
Wire
N0: Packet preamble, SFD
and destination address
are arriving.
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 #2
generated.
bursts of DMA to fill data buffer #1.
N1: 64th byte of packet
data arrives.
}
Controller
Ethernet
activity:
Figure B-1. LAPP Timeline
Am79C978A
Buffer
Buffer
Buffer
#3
#2
#1
S10: Driver sets up TX descriptor.
S9: Application processes packet, generates TX packet.
S7: Driver polls descriptor of buffer #3.
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.
buffer.
Software
activity:
}
buffer.
}
}
S3: Driver writes modified application
S2: Driver call to application to
S8: Driver calls application
pointer to descriptor #3.
get application buffer pointer.
to tell application that
packethas arrived.
22399A-B1
Related parts for AM79C978A
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![AMD-751AC](/images/manufacturer_photos/0/0/14/advanced_micro_devices_tmb.jpg)
Part Number:
Description:
AMD-751ACAMD-751-TM System Controller Revision Guide
Manufacturer:
Advanced Micro Devices
Datasheet:
![AMD-751](/images/manufacturer_photos/0/0/14/advanced_micro_devices_tmb.jpg)
Part Number:
Description:
AMD-751AMD-751-TM System Controller Revision Guide
Manufacturer:
Advanced Micro Devices
Datasheet:
![AMD-X5-133SFZ](/images/manufacturer_photos/0/0/14/advanced_micro_devices_tmb.jpg)
Part Number:
Description:
AMD-X5-133SFZAm5X86? Microprocessor Family
Manufacturer:
Advanced Micro Devices
Datasheet:
![AMD-8131BLC](/images/manufacturer_photos/0/0/14/advanced_micro_devices_tmb.jpg)
Part Number:
Description:
Hyper Transport PCI-X Tunnel
Manufacturer:
Advanced Micro Devices
Datasheet:
![AMD-8111AC](/images/manufacturer_photos/0/0/14/advanced_micro_devices_tmb.jpg)
Part Number:
Description:
HyperTransport I/O Hub
Manufacturer:
Advanced Micro Devices
Datasheet:
![AMD-640AC](/images/manufacturer_photos/0/0/14/advanced_micro_devices_tmb.jpg)
Part Number:
Description:
System Controller
Manufacturer:
Advanced Micro Devices
Datasheet:
![AMD-K6](/images/no-image3.png)
Part Number:
Description:
AMD-K6 Processor
Manufacturer:
AMD [Advanced Micro Devices]
Datasheet:
![AMD-K6-2E/400AFR](/images/no-image3.png)
Part Number:
Description:
AMD-K6™-2E Embedded Processor
Manufacturer:
AMD [Advanced Micro Devices]
Datasheet:
![AMD-8132BLCT](/images/manufacturer_photos/0/0/44/amd__advanced_micro_devices__tmb.jpg)
Part Number:
Description:
Manufacturer:
AMD (ADVANCED MICRO DEVICES)
Datasheet:
![AMD-K6-IIIE+550ACR](/images/manufacturer_photos/0/0/44/amd__advanced_micro_devices__tmb.jpg)
Part Number:
Description:
Manufacturer:
AMD (ADVANCED MICRO DEVICES)
Datasheet:
![AMD-766AC](/images/no-image3.png)
Part Number:
Description:
Peripheral Bus Controller
Manufacturer:
AMD [Advanced Micro Devices]
Datasheet: