CY7C964-GMB Cypress Semiconductor Corporation., CY7C964-GMB Datasheet

CY7C964-GMB

Manufacturer Part Number

CY7C964-GMB

Description

Manufacturer

Cypress Semiconductor Corporation.

Datasheet

1.CY7C964-GMB.pdf (6 pages)

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Features

Functional Description

The CY7C964 integrates several space-consuming functions

into one small package, freeing board space for the implemen-

tation of added-value board features. It contains counters,

comparators, latches, and drivers configured to be of value to

implementors of any backplane interface with address and

data buses, particularly VMEbus interfaces. The on-chip driv-

ers are suitable for driving the VMEbus directly. The CY7C964

is ideal in applications where high-performance and real es-

tate are primary concerns.

Although having many applications, the Bus Interface Logic

Circuit is an ideal companion part to Cypress’s VMEbus family

of components, the VIC068A, VIC64, the CY7C960, and

CY7C961. It is intended to drive the address and data buses,

so three or four of these small devices are needed per control-

Cypress Semiconductor Corporation

• Comparators, counters, latches, and drivers minimize

• Directly drives VMEbus address and data signals

• 8-bit comparator for slave address decoding

• Flexible interface optimized for VMEbus applications

• Companion device to Cypress VMEbus family of com-

• Replaces multiple SSI/MSI components

• Cascadable

• 64-pin QFP and 68-pin PGA packages

• See the VMEbus Interface Handbook for more informa-

logic requirements for a variety of multiplexed and

non-multiplexed buses

ponents

tion

Pin Configuration

STROBE*

VCOMP*

VCOUT*

LCOUT*

MWB*

LADO

LEDO

GND

LADI

LEDI

LDS

LD7

FC1

•

3901 North First Street

PQFP/CQFP/TQFP

Top View

ler. In every case, the controllers provide the control and timing

signals to the Bus Interface Logic Circuit as it acts as a bridge

between the VMEbus and the Local bus.

Application with VMEbus Architecture

Use with Cypress VMEbus Controllers

The CY7C964 Bus Interface Logic Circuit is a seamless inter-

face between the VIC068A/VIC64 and the VMEbus signals.

The device functions equally well in the established 32-bit

VMEbus arena and the new 64-bit VMEbus standard. The de-

vice contains three 8-bit counters to fulfill the functions of Block

counters, and DMA counters as implied by the D64 portion of

the VMEbus specification. It also contains the necessary mul-

tiplexing logic to allow the 64-bit-wide VMEbus path to be fun-

nelled to and from the 32-bit local bus. Control circuitry is in-

cluded to manage the switching of the 32-bit address bus

during normal (32-bit) operations, and during MBLT (64-bit)

operations. The on-chip drivers are capable of driving the

VMEbus directly (48 mA).

Use in Other VMEbus Controller Implementations

The CY7C964 circuitry is designed to be of use to designers

of VMEbus circuitry, including VSB (VME subsystem bus) and

designs not requiring the features of the Cypress VIC068A,

VIC64, CY7C960, and CY7C961. The logic diagram includes

general-purpose blocks of comparators, counters, and latches

that can be controlled using the flexible control interface to

allow many different options to be implemented. Although the

device is packaged in a small 64-pin package, the use of mul-

tiplexed input and output pins provides access to the many

internal functions, thus saving external circuitry.

•

Bus Interface Logic Circuit

San Jose

November 1992 – Revised December 4, 1997

C964-1

GND

LD0

LA0

DENIN*

DENIN1*

LAEN

LCIN*

VCIN*

VCC

BLT*

D64

DENO*

ABEN*

GND

•

CA 95134

•

CY7C964

fax id: 5604

408-943-2600

Related parts for CY7C964-GMB

CY7C964-GMB Summary of contents

Page 1

... The on-chip drivers are capable of driving the VMEbus directly (48 mA). Use in Other VMEbus Controller Implementations The CY7C964 circuitry is designed use to designers of VMEbus circuitry, including VSB (VME subsystem bus) and designs not requiring the features of the Cypress VIC068A, VIC64, CY7C960, and CY7C961. The logic diagram includes ...

Page 2

... Bottom View LCIN* DENIN1* LA0 D64 CC DENO* BLT* VCIN* LAEN DENIN* LEDI LADO LCOUT* STROBE* VCOMP* LEDO LADI VCOUT* GND MWB* 2 CY7C964 GND LD0 V LA1 CC C LD1 LA2 D LD2 LA3 E LD3 GND F LA4 LD4 G LA5 LD5 ...

Page 3

... Application with Other Bus Architectures The CY7C964 is optimized for applications requiring wide buff- ers and high-performance multiplexing operations. The archi- tecture can be configured to provide functions such as 16-bit bidirectional three-state latch and 16-bit comparator with mask Ordering Information Package Ordering Code Name CY7C964– ...

Page 4

... Package Diagrams 64-Pin Thin Quad Flatpack A64 68-Pin Grid Array (Cavity Up) G68 4 CY7C964 ...

Page 5

... Package Diagrams (continued) 64-Lead Plastic Thin Quad Flatpack N65 5 CY7C964 ...

Page 6

... The inclusion of Cypress Semiconductor products in life-support systems application implies that the manufacturer assumes all risk of such use and in doing so indemnifies Cypress Semiconductor against all charges. 64-Lead Ceramic Quad Flatpack (Cavity Up) U65 CY7C964 ...

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