AM79C978 Advanced Micro Devices, AM79C978 Datasheet - Page 206
AM79C978
Manufacturer Part Number
AM79C978
Description
Single-Chip 1/10 Mbps PCI Home Networking Controller
Manufacturer
Advanced Micro Devices
Datasheet
1.AM79C978.pdf
(261 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: 206 of 261
- Download datasheet (4Mb)
28
27
206
LCOL
LCAR
Excessive Deferral on this trans-
mit frame, where Excessive De-
ferral is defined in the ISO 8802-3
(IEEE/ANSI 802.3) standard. Ex-
cessive Deferral will also set the
interrupt bit EXDINT (CSR5, bit
7).
Late Collision indicates that a col-
lision has occurred after the first
channel slot time has elapsed.
The
networkingAm79C978 controller
does not retry on late collisions.
LCOL is set by the Am79C978
controller and cleared by the
host.
Loss of Carrier is set when the
carrier
Am79C978
transmission when operating in
half-duplex
Am79C978 controller does not
retry upon loss of carrier. It will
continue to transmit the whole
frame until done. LCAR will not
be set when the device is operat-
ing in full-duplex mode. LCAR is
not valid in Internal Loopback
Mode. LCAR is set by the
Am79C978
cleared by the host.
LCAR will be set when the PHY is
in Link Fail state during transmis-
sion.
is
Am79C978
controller
lost
controller
mode.
during
initiated
home
The
and
Am79C978
an
26
25-4
3-0
TMD3
Bit
31-0
RTRY
RES
TRC
US
Name
Retry error indicates that the
transmitter has failed after 16 at-
tempts to successfully transmit a
message, due to repeated colli-
sions on the medium. If DRTY is
set to 1 in the MODE register,
RTRY will set after one failed
transmission attempt. RTRY is
set by the Am79C978 controller
and cleared by the host.
Reserved locations.
Transmit Retry Count. Indicates
the number of transmit retries of
the associated packet. The maxi-
mum count is 15. However, if a
RETRY error occurs, the count
will roll over to 0.
In this case only, the Transmit
Retry Count value of 0 should be
interpreted as meaning 16. TRC
is written by the Am79C978 con-
troller into the last transmit de-
scriptor of a frame, or when an
error terminates a frame. Valid
only when OWN is cleared to 0.
User Space. Reserved for user
defined space.
Description
Related parts for AM79C978
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Advanced Micro Devices [4,096-Bit (512x8) Bipolar PROM]
Manufacturer:
Advanced Micro Devices
Datasheet:
Part Number:
Description:
Advanced Micro Devices [4,096-Bit (512x8) Bipolar PROM]
Manufacturer:
Advanced Micro Devices
Datasheet:
Part Number:
Description:
Advanced Micro Devices [8 Megabit (512 K x 16-Bit) CMOS 3.0 Volt-only Burst Mode Flash Memory]
Manufacturer:
Advanced Micro Devices
Datasheet:
Part Number:
Description:
M41000001YAdvanced Micro Devices [32 Megabit (4 M x 8-Bit/2 M x 16-Bit) CMOS 3.0 Volt-only, Simultaneous Operation Flash Memory and 4 Mbit (512 K x 8-Bit/256 K x 16-Bit) Static RAM]
Manufacturer:
Advanced Micro Devices
Datasheet:
Part Number:
Description:
Advanced Burst Error Processor
Manufacturer:
Advanced Micro Devices
Part Number:
Description:
Serial interface adapter (SIA)
Manufacturer:
Advanced Micro Devices
Datasheet:
Part Number:
Description:
Universal interrupt controller
Manufacturer:
Advanced Micro Devices
Datasheet:
Part Number:
Description:
256 kilobit CMOS EPROM
Manufacturer:
Advanced Micro Devices
Datasheet:
Part Number:
Description:
2048 x 8 static RAM, 100ns
Manufacturer:
Advanced Micro Devices
Datasheet:
Part Number:
Description:
Manufacturer:
Advanced Micro Devices
Datasheet:
Part Number:
Description:
Three-State Octal Buffers
Manufacturer:
Advanced Micro Devices
Datasheet:
Part Number:
Description:
AM2966PCOctal Dynamic Memory Drivers with Three-State Outputs
Manufacturer:
Advanced Micro Devices
Datasheet:
Part Number:
Description:
Three-State Octal Buffers
Manufacturer:
Advanced Micro Devices
Datasheet:
Part Number:
Description:
Three-State Octal Buffers
Manufacturer:
Advanced Micro Devices
Datasheet:
Part Number:
Description:
TTL programmable array logic, 7ns
Manufacturer:
Advanced Micro Devices
Datasheet: