DataSheetWiki


DS3875 fiches techniques PDF

National Semiconductor - Futurebusa Arbitration Controller

Numéro de référence DS3875
Description Futurebusa Arbitration Controller
Fabricant National Semiconductor 
Logo National Semiconductor 





1 Page

No Preview Available !





DS3875 fiche technique
November 1995
DS3875 Futurebusa Arbitration Controller
General Description
The DS3875 Futurebusa Arbitration Controller is a member
of National Semiconductor’s Futurebusa chip set designed
specifically for the IEEE 896 1 Futurebusa standard The
DS3875 implements Distributed Arbitration and Distributed
Arbitration messages in a single chip
The DS3875 interfaces with Futurebusa through the
DS3885 BTL Arbitration Transceiver and the DS3884A BTL
Handshake Transceiver The DS3885 BTL Arbitration
Transceiver incorporates the competition logic needed for
the Arbitration Number signal lines The DS3884A BTL
Handshake Transceiver has selectable Wired-OR receiver
glitch filtering The DS3884A is used for the Arbitration Se-
quencing and Arbitration Condition signal lines
Additional transceivers included in the Futurebusa chip set
are the DS3883A BTL 9-bit Data Transceiver and the
DS3886A BTL 9-bit Latching Data Transceiver The
DS3886A transceiver features edge-triggered latches in the
driver which may be bypassed during a fall-through mode
and a transparent latch in the receiver The DS3883A trans-
ceiver has no latches in either direction
The Logical Interface Futurebusa Engine (LIFE) I O Proto-
col Controller with 64-bit Data Path incorporates the Com-
pelled Mode Futurebusa Parallel Protocol The Protocol
Controller handles all the handshaking signals between the
Futurebusa and the local bus interfaces and incorporates
a DMA Controller with built-in FIFOs for fast queueing
Features
Y The controller implements the complete requirements
of the IEEE 896 1 specification as a subset of its fea-
tures
Y Supports Arbitration message sending and receiving
Y Supports the two modes of operation (RESTRICTED
UNRESTRICTED)
Y Software configurable double single pass operation
slow fast IBA Parking and restricted unrestricted
modes of arbitration
Y Built-in 1 ms timer for use in the arbitration cycle
Y User programmable 16 arbitration delays (8 slow and
8 fast)
Y Built-in PLL for accurate delays The PLL accepts
clocks from 2 MHz to 40 MHz in steps of 1 MHz
Y Signal to unlock slave modules on transfer of tenure
Auto unlock through a dummy cycle if the current mas-
ter locked resources
Y Programmable delay for releasing ar after issuing
COMPETE IBA CMPT This is to ensure the assertion
of the arbitration number during competition before the
release of ar Also this delay ensures there is suffi-
cient time to assert the AD DATA lines during Idle Bus
Arbitration before the release of ar
Y Read Write facility with data acknowledge for the host
to load arbitration numbers an arbitration message
and control registers
Y On chip parity generator unloads the host of the addi-
tional parity generation function
Y Separate interrupts to indicate error occurrence and ar-
bitration message received Interrupts cleared on a reg-
ister write Error status is available in a separate status
register
Y A special output pin to indicate that a POWERFAIL
message was received
Y Hardwired register to hold the first word of the arbitra-
tion message
Y FIFO strobe provided to store more than one arbitration
message externally to prevent overrun
Y Idle Bus Arbitration (IBA) supported
Y Parking implemented
Y Bus initialization system reset and Live-insertion sup-
ported (The logic to detect these conditions must be
implemented externally )
Y Testability in the form of reading from key registers
which include the STATE MCW 1 ms timer and pro-
grammable input clock divider
National’s Futurebusa Chip Set Diagram
C1995 National Semiconductor Corporation TL H 10747
TL H 10747 – 1
RRD-B30M115 Printed in U S A

PagesPages 58
Télécharger [ DS3875 ]


Fiche technique recommandé

No Description détaillée Fabricant
DS3875 Futurebusa Arbitration Controller National Semiconductor
National Semiconductor
DS3875 DS3875 Futurebus+ Arbitration Controller MIL-STD-883 Texas Instruments
Texas Instruments
DS3875V Futurebusa Arbitration Controller National Semiconductor
National Semiconductor

US18650VTC5A

Lithium-Ion Battery

Sony
Sony
TSPC106

PCI Bus Bridge Memory Controller

ATMEL
ATMEL
TP9380

NPN SILICON RF POWER TRANSISTOR

Advanced Semiconductor
Advanced Semiconductor


www.DataSheetWiki.com    |   2020   |   Contactez-nous  |   Recherche