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VN970

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Description 
 
 

VN970 More Information

Mfg: STM
Pack: ZIP-15
D/C: 05+

Description

HOLD ACKNOWLEDGE: The active high Hold Acknowledge from the CPU indicates that it has relinquished control of the system busses. HLDA is a synchronous input and must not transition during its specified set-up time. There is an implied hold time (HLDA inactive) of TCH from the rising edge of CLK, during which time HLDA must not transition.
 VN970 PDF Download

VN970 PDF

File Size:487823 KB

Applications

Understanding the way the VN970 Family documents are versioned is vital to understanding organization of the literature. There are two revision levels on each document: • Major V04.11 (The four in this example is the major revision number.) When a document   is changed to reflect a functional change in the way a device operates, from one version of   silicon to another or from one version of a module to another, the functional change will be   described in a document that increments the major revision number. This major version   number is included in the order number of the document, for example S12CRGV4/D, where   S12CRGV3/D documents an earlier version of the CRG module still included on some   devices. The specification for the CRG module changed between V3 and V4 of the block   guide. • Minor V04.11 (The eleven in this example is the minor revision number.) Minor revisions   indicate that typos were fixed, or other minor corrections were made to the document. Minor   revisions do not indicate a functional change. On the Web display, the document number will show as S12CRGV4/D, Rev. 11, because V4.11 is the eleventh revision of major version 4 of the document. When consulting documentation for the VN970 Family devices, be aware that the date on the cover of the document indicates the date the document was released to publication. The date displayed on the Web is the day the document appeared on the Web. The two dates may not match. The important thing to look at is the major.minor revision number, and not the date. Detailed revision history tables within each of the documents describe what changes were made, and when.
 

Features

The Simtek VN970 is a fast static RAM with a nonvolatile element incorporated in each static memory cell. The SRAM can be read and written an unlimited number of times, while independent, non- volatile data resides in the Nonvolatile Elements. Data transfers from the SRAM to the Nonvolatile Ele- ments (the STORE operation), or from Nonvolatile Elements to SRAM (the RECALL operation), take place using a software sequence. Transfers from the Nonvolatile Elements to the SRAM (the RECALL operation) also take place automatically on restora- tion of power.

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VN970 Suppliers

Part Number Mfg Pack D/C Qty Description Inquiry
VN970 05+ 05+ ZIP-15 1511 2C006
VN90 CAN3 1080 STRC Verified
VN900 07+ 07+ VIA 630
VN900 07+ 07+ BGA 630
VN90AA 04+ 04+ 1000
VN90AA 500 500 CAN3
VN90AB 04+ 04+ 1000
VN90AB 500 500 CAN3
VN90ABA 04+ 04+ 1000
VN90ABA CAN 60
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