AM79C978 Advanced Micro Devices, AM79C978 Datasheet - Page 115
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: 115 of 261
- Download datasheet (4Mb)
CSR1: Initialization Block Address 0
Bit
31-16
15-0
CSR2: Initialization Block Address 1
Bit
31-16
15-8
Name
RES
IADR[15:0] Lower 16 bits of the address of
Name
RES
IADR[31:24] If SSIZE32 is set (BCR20, bit 8),
formed first. INIT is not cleared
when the initialization sequence
has completed.
This bit is always read/write ac-
cessible. INIT is set by writing a 1.
Writing a 0 has no effect. INIT is
cleared
S_RESET, or by setting the
STOP bit.
zeros and read as undefined.
the Initialization Block. Bit loca-
tions 1 and 0 must both be 0 to
align the initialization block to a
DWord boundary.
This register is aliased with
CSR16.
These bits are read/write acces-
sible only when either the STOP
or the SPND bit is set. These bits
are unaffected by H_RESET,
S_RESET, or by setting the
STOP bit.
zeros and read as undefined.
then the IADR[31:24] bits will be
used strictly as the upper 8 bits of
the initialization block address.
However, if SSIZE32 is reset
(BCR20,
IADR[31:24] bits will be used to
generate the upper 8 bits of all
bus mastering addresses, as re-
quired for a 32-bit address bus.
Note that the 16-bit software
structures
SSIZE32 = 0 setting will yield
only 24 bits of address for the
Am79C978 bus master access-
es, while the 32-bit hardware for
which the Am79C978 controller is
intended will require 32 bits of ad-
Description
Reserved locations. Written as
Description
Reserved locations. Written as
bit
specified
by
8),
H_RESET,
then
by
the
the
Am79C978
7-0
CSR3: Interrupt Masks and Deferral Control
Bit
31-16 RES
IADR[23:16] Bits 23 through 16 of the address
Name
dress.
SSIZE32 = 0, the IADR[31:24]
bits will be appended to the 24-bit
initialization address, to each 24-
bit descriptor base address, and
to each beginning 24-bit buffer
address in order to form complete
32-bit addresses. The upper 8
bits that exist in the descriptor ad-
dress registers and the buffer ad-
dress registers which are stored
on board the Am79C978 control-
ler will be overwritten with the
IADR[31:24] value, so that CSR
accesses to these registers will
show the 32-bit address that in-
cludes the appended field.
If SSIZE32 = 1, then software will
provide 32-bit pointer values for
all of the shared software struc-
tures - i.e., descriptor bases and
buffer addresses, and therefore,
IADR[31:24] will not be written to
the upper 8 bits of any of these
resources, but it will be used as
the upper 8 bits of the initializa-
tion address.
This register is aliased with
CSR17.
These bits are read/write acces-
sible only when either the STOP
or the SPND bit is set. These bits
are unaffected by H_RESET,
S_RESET, or by setting the
STOP bit.
These bits are read/write acces-
sible only when either the STOP
or the SPND bit is set. These bits
are unaffected by H_RESET,
S_RESET, or by setting the
STOP bit.
of the Initialization Block. When-
ever this register is written,
CSR17 is updated with CSR2’s
contents.
Description
zeros and read as undefined.
Reserved locations. Written as
Therefore,
whenever
115
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: