AM79C970AKCW AMD [Advanced Micro Devices], AM79C970AKCW Datasheet - Page 41
AM79C970AKCW
Manufacturer Part Number
AM79C970AKCW
Description
PCnet-PCI II Single-Chip Full-Duplex Ethernet Controller for PCI Local Bus Product
Manufacturer
AMD [Advanced Micro Devices]
Datasheet
1.AM79C970AKCW.pdf
(219 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
AM79C970AKCW
Manufacturer:
AMD
Quantity:
6 557
- Current page: 41 of 219
- Download datasheet (2Mb)
During the data phase of an I/O write, memory mapped
I/O write or configuration write command that selects
the PCnet-PCI II controller as target, the device samples
the AD[31:0] and C/BE[3:0] lines for parity on the clock
edge data is transferred. PAR is sampled in the follow-
ing clock cycle. If a parity error is detected and reporting
of that error is enabled by setting PERREN (PCI Com-
mand register, bit 6) to ONE, PERR is asserted one
clock later. The parity error will always set PERR (PCI
Status register, bit 15) to ONE even when PERREN is
cleared to ZERO. The PCnet-PCI II controller will finish
a transaction that has a data parity error in the normal
DEVSEL
FRAME
PERR
TRDY
C/BE
IRDY
CLK
PAR
AD
1
Figure 11. Slave Cycle Data Parity Error Response
2
ADDR
CMD
3
PAR
P R E L I M I N A R Y
4
Am79C970A
5
DATA
BE
way by asserting TRDY. The corrupted data will be writ-
ten to the addressed location.
Figure 11 shows a transaction that suffered a parity
error at the time data was transferred (clock 7, IRDY and
TRDY are both asserted). PERR is driven high at the
beginning of the data phase and then drops low due to
the parity error on clock 9, two clock cycles after the data
was transferred. After PERR is driven low, the
PCnet-PCI II controller drives PERR high for one clock
cycle, since PERR is a sustained tri-state signal.
6
PAR
7
8
9
10
19436A-14
AMD
41
Related parts for AM79C970AKCW
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
AMD-751ACAMD-751-TM System Controller Revision Guide
Manufacturer:
Advanced Micro Devices
Datasheet:
Part Number:
Description:
AMD-751AMD-751-TM System Controller Revision Guide
Manufacturer:
Advanced Micro Devices
Datasheet:
Part Number:
Description:
AMD-X5-133SFZAm5X86? Microprocessor Family
Manufacturer:
Advanced Micro Devices
Datasheet:
Part Number:
Description:
Hyper Transport PCI-X Tunnel
Manufacturer:
Advanced Micro Devices
Datasheet:
Part Number:
Description:
HyperTransport I/O Hub
Manufacturer:
Advanced Micro Devices
Datasheet:
Part Number:
Description:
System Controller
Manufacturer:
Advanced Micro Devices
Datasheet:
Part Number:
Description:
AMD-K6 Processor
Manufacturer:
AMD [Advanced Micro Devices]
Datasheet:
Part Number:
Description:
AMD-K6-2E Embedded Processor
Manufacturer:
AMD [Advanced Micro Devices]
Datasheet:
Part Number:
Description:
Manufacturer:
AMD (ADVANCED MICRO DEVICES)
Datasheet:
Part Number:
Description:
Manufacturer:
AMD (ADVANCED MICRO DEVICES)
Datasheet:
Part Number:
Description:
Peripheral Bus Controller
Manufacturer:
AMD [Advanced Micro Devices]
Datasheet: