TI380FPA Datasheet, PDF (1/24 Pages) Texas Instruments – PACKETBLASTER™

TI380FPA
PACKETBLASTERā
D Frame-Processing Accelerator for TI380C2x
and TI380C3x
D Supports TI380C2x and TI380C3x
Token-Ring  Adapters
D Supports TI380C2x Ethernet  Adapters
D Supports 4- or 6-MHz Adapter Local Bus
Operation
D Interfaces Directly to TI380C2x Network
Commprocessors
D Hardware Capture of Network Statistics
D Increases Adapter-Frame-Processing Rate
up to 28K Frames per Second
D Single 5-V Supply
D 0.8-µm CMOS Technology
D 52-Pin Plastic Leaded Chip Carrier (FN)
D Operating Temperature Range
0°C to 70°C
SPWS011A − MARCH 1995 − REVISED AUGUST 1995
FN PACKAGE
( TOP VIEW )
7 6 5 4 3 2 1 52 51 50 49 48 47
MADH0
MADH1
MADH2
VSSL
VSS
MADH3
VSSC
MADH4
VDD
VDDL
MADH5
MADH6
MADH7
8
46
9
45
10
44
11
43
12
42
13
41
14
40
15
39
16
38
17
37
18
36
19
35
20
34
21 22 23 24 25 26 27 28 29 30 31 32 33
PLLVDD
PLLCAP
PLLVSS
MBCLK1
NC
MRESET
VSSL
MANT0
MANT1
MBGR
VDDL
EXTINT0
MBRQ
description
The TI380FPA frame processing accelerator (FPA) provides hardware to accelerate the processing rate of
frames by the network communications processor (commprocessor). It supports a 4-MHz or 6-MHz adapter
local bus operation. The CPU of a normal TI380C2x or TI380C3x adapter is responsible for frame transport
between network and host, gathering adapter and network statistics, local-network-management protocols, and
medium-access-control (MAC) protocols. The TI380FPA puts the performance bottlenecks of frame transport
and statistics gathering into dedicated hardware, leaving the CPU to run MAC and management protocols.
The TI380FPA is responsible for:
D Management of all commprocessor protocol handler (PH) operations. The FPA manages all receive- and
transmit-frame queues.
D Management of adapter buffers. The FPA manages all adapter memory buffers, allocating them to the
appropriate queues as required.
D Management of host direct memory access (DMA) by way of the commprocessor system interface (SIF)
DMA controller.
D Management of frame transfers to the host. The FPA manages queues of frames to and from the host,
manages rx/tx list information, and coordinates the two.
D Gathering adapter and network statistics in dedicated hardware counters.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
IBM and Token-Ring Network are trademarks of International Business Machines Corp.
PacketBlaster is a trademark of Texas Instruments Incorporated.
Ethernet is a trademark of Xerox Corporation.
ADVANCE INFORMATION concerns new products in the sampling or
preproduction phase of development. Characteristic data and other
specifications are subject to change without notice.
Copyright  1995, Texas Instruments Incorporated
• POST OFFICE BOX 655303 DALLAS, TEXAS 75265
• POST OFFICE BOX 1443 HOUSTON, TEXAS 77251−1443
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