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Comment: Additional 3v3 1M Flash chips added

https://tinyurl.com/godhtf5

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Table of Contents

Introduction

It has been around seven years since the current Flash card was designed. At that time it was done in a rush, without much research, as the AMD 1M chip was being withdrawn and the footprint for that device needed to be changed. As the footprint was a lot smaller, there was enough space on the PCB to add a 512K Flash and 1M RAM. The cost of manufacturing a PCB is based on the size of the card, if the 512K/512 Flash/RAM configuration worked or not, the cost would have been the same (although the workload in the design would have been a lot less!).

By a sheer coincidence, OZ 4.x was being developed at the same time and it was found that the INTEL chip could not run OZ 4.x but it could be used for storing files. What was NOT realised at that time was that the AMD 1M Flash chip, although was a lot better, it could also fail, when running OZ. This was not discovered until quite recently.

AMIC announced that the 512K Flash chip used was no longer being manufactured. That triggered this section to be written.

The purpose of this section is to compare the original 5v Flash chips with the 3.3v versions and to ensure that the next version addresses any outstanding issues.

Latest NEWS

...

We are designing a successor for the A29040C called A29040D. This part will become available in Q2.
Its pin out , form factor and programming ID will be identical to its predecessor. So any design around the A29040C will be suitable for the A29040D.

In case you consider the 3 volt option we advise A29L040B which is also in design and will be released in Q3 this year.

All these new designs are necessary to transfer to new wafer processes allowing long term availability.
In either case we look forward to supply your design.

With best regards,

...


https://tinyurl.com/godhtf5

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Table of Contents

Latest NEWS

DateFrom
31/08/17NoteThe 5v successor for the A29040C called A29040D has not appeared. See Future of 5v Flash Chips for more information
24/02/17 AMIC Technology

We are designing a successor for the A29040C called A29040D. This part will become available in Q2.
Its pin out , form factor and programming ID will be identical to its predecessor. So any design around the A29040C will be suitable for the A29040D.

In case you consider the 3 volt option we advise A29L040B which is also in design and will be released in Q3 this year.

All these new designs are necessary to transfer to new wafer processes allowing long term availability.
In either case we look forward to supply your design.

With best regards,

Rob
Mob: +31-6-531.589.49 – Desk +31-321-313.719 -- Skype:amicrobstuart -




Introduction

It has been around seven years since the current Flash card was designed. At that time it was done in a rush, without much research, as the AMD 1M chip was being withdrawn and the footprint for that device needed to be changed. As the footprint was a lot smaller, there was enough space on the PCB to add a 512K Flash and 1M RAM. The cost of manufacturing a PCB is based on the size of the card, if the 512K/512 Flash/RAM configuration worked or not, the cost would have been the same (although the workload in the design would have been a lot less!).

By a sheer coincidence, OZ 4.x was being developed at the same time and it was found that the INTEL chip could not run OZ 4.x but it could be used for storing files. What was NOT realised at that time was that the AMD 1M Flash chip, although was a lot better, it could also fail, when running OZ. This was not discovered until quite recently.

AMIC announced that the 512K Flash chip used was no longer being manufactured. That triggered this section to be written.

The purpose of this section is to compare the original 5v Flash chips with the 3.3v versions and to ensure that the next version addresses any outstanding issues.

PCB Improvements

There are changes that have been requested.

  • Real GOLD to be used on the card connector, instead of flash gold currently used.
  • Pads on the chips to be made larger for easier hand soldering.
  • 4 Layer board to be considered

Comparing different Flash chips 1M x 8

General Features

Size / Footprint

1M x 8 FlashTSOP TSOP 48

40 pin TSOP

Type / FunctionMX29LV800CS29AL008J

Am29F080B-85

Datasheet Version

Dec. 22, 2011
Rev. 2.6

December 11, 2015
Rev. *K

April 1997

PRELIMINARY

VCC Voltage Range

2.7V ~ 3.6V2.7V ~ 3.6V

5.0 Volt ± 5%

Access Time

55ns *1 /70ns

55ns *1 /70ns

85ns

Bus Width

X8 / x16X8 / x16X8

Boot Block

Top/BottomTop/Bottom

Sector Architecture

16KB+ 2*8KB+32KB
+ 15*64KB sectors.

16KB+ 2*8KB+32KB
+ 15*64KB sectors.


OTP Security Region

-256Byte

CFI Compliant

YesYes

Sector Protect/
Unprotect

YesYesYes

Temp Sector Protect/
Unprotect

YesYesYes

Erase Suspend/
Resume

YesYes

Hardware Reset# Pin

YesYes

WP# Pin

-Yes

Manufacture ID

C2h01h
Device ID Top/Bottom22DAh/225Bh22DAh/225Bh

...

Write Function Performance (Program and Erase)

Write FunctionMX29LV800CS29AL008J
Byte Program Time9us6us
Accelerated Byte/Word Programming Time7us-
Chip Program Time Byte Mode

9s

6.3s

Sector Erase time

0.7s

0.5s

Chip Erase time

8s

10s

Manufacturer and Device ID Command Definitions (Word Mode)

Flash VenderManufacturer ID

Device ID


MX29LV800CS29AL008JMX29LV800C
S29AL008J
1st Bus
Cycle

Addr

555h555h555h
555h

Data

AAhAAhAAh
AAh

2nd Bus
Cycle

Addr2AAh2AAh2AAh
2AAh
Data55h55h55h
55h
3rd Bus
Cycle		Addr555h555h555h
555h
Data90h90h90h
90h
4th Bus
Cycle		AddrX00hX00hX01h
X01h
DataC2h01h

22DAh/225Bh


22DAh/225Bh

Note.
(1) Device ID can be read out after Manufacturer ID with proper address and does not need another command sequence.
(2) Use Reset command (F0h) to return to normal read mode.

...

All manufactures use this standard.

...

1M Flash 3v3

Being updated - not complete.

The following device was available 27/07/2013devices were available from

AM29F800BB-55EFSPANSION
 DevicePackageManufacturerSectors 
Image Added
S29AL008J48-Pin TSOP CYPRESS SEMICONDUCTOR

64 Kbyte
sectors


Image Modified

S29AL008J70TFI020

48-Pin TSOPCYPRESS SEMICONDUCTOR

64 Kbyte
sectors


Image Added

S29AL008J70TFI020

48-Pin TSOPCYPRESS SEMICONDUCTOR

64 Kbyte
sectors


Image Added

S29AL008J55TFIR10

48-Pin TSOPCYPRESS SEMICONDUCTOR

64 Kbyte
sectors


 

...

 

...

Spansion 's Data Sheets

AMIC may have had some 5v replacements A29800, A29801 these are no longer available.

The package is slightly larger, they do not fully match.

Once stocks of the Am29F080B device are depleted, there is no replacement.

...

have been taken over by Cypress Semiconductor

512K Flash 3v3

The following device is available 23/02/17


DevicePackageManufacturerSectors

SST39SF040-70-4C-NHEPLCCMICROCHIP4
Kbyte
sectors

NOTE: The Z88 will not be able to program this chip due to the 4 Kbyte sectors. It may be programmed with an external programmer.

...

 DevicePackageManufacturerSectors 
A29040C-55FDIP 32AMIC

64 Kbyte
sectors

 


A29040CL-55FPLCCAMIC

64 Kbyte
sectors

 

The following devices were available 27/07/2013  

 DevicePackageManufacturerSectors 
A29040B-70FDIP 32AMIC

64 Kbyte

sectors

 
A29040BLA29L040AL-70FPLCCAMIC

64 Kbyte

sectors

  3v3
Image Removed

Image Added

A29040BV A29L400BUV-70F32 48 TSOPAMIC

64 Kbyte

sectors

  3v3
AM29F040B-55JFPLCCSPANSION

64 Kbyte

sectors

 
AM29F040B-90JFPLCCSPANSION

64 Kbyte

sectors

 
A29L040L-70FPLCCAMIC

64 Kbyte

sectors

 
SST39SF040-70-4C-NHEPLCCMICROCHIP

Uniform

4KByte

sectors

 
SST39SF040-70-4I-NHEPLCC 

Uniform

4KByte

sectors

 
SST39SF040-70-4I-WHE32 TSOP 

Uniform

4KByte

sectors

 

128K Flash

...

3v3

The following devices are available 27/07/2013

 DevicePackageManufacturerSectors 
A29010L-70FPLCCAMIC

64 Kbyte

sectors

 
A29010V-70F32 TSOPAMIC

64 Kbyte

sectors

 
AM29F010B-70JFPLCCSPANSION

64 Kbyte

sectors

 
SST39SF010A-70-4C-NHEPLCCMICROCHIP

Uniform

4KByte

sectors

 
SST39SF010A-70-4C-WHE32 TSOPMICROCHIP

Uniform

4KByte

sectors

 
SST39SF010A-70-4I-NHEPLCCMICROCHIP

Uniform

4KByte

sectors

 
SST39SF010A-70-4I-WHE32 TSOPMICROCHIP

Uniform

4KByte

sectors

 
SST39SF010A-70-4C-PHEDIP 32MICROCHIP

Uniform

4KByte

sectors

 

OR Gates

We might need an OR gate for /CE, POE to POE_S


DevicePackageManufacturer

ON SEMICONDUCTOR MC74VHC32DR2GImage Added

 MC74VHC32DR2G SOICON SEMICONDUCTOR


Conclusion

  • There is no life left for the 1M Flash chips.
  • The 512K size was the most cost effective and the 64 sector version was manufactured two companies.
  • 128K is not a lot cheaper than the 512K and is uneconomic to use.

...