LHF16J04 Просмотр технического описания (PDF) - Sharp Electronics

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LHF16J04

Flash Memory 16M (1M × 16/2M × 8)

Sharp Electronics 

SHARI’=

LHFI 6504

7

2 PRINCIPLES OF OPERATION

The LH?8F160BJHE-TTL90

flash memory includes an

on-chip WSM to manageblock erase.full chip erase.

wordlbyte write and lock-bit configuration functions. It

allows for: 100%TILleve control inputs. fixed power

suppliesduring block erase,full chip erase.word/byte

write and lock-bit configuration. and minimal processor

overheadwith RAIM-like interfacetimings.

After initial device power-upor return from resetmode

(seesection3 BusOperations),the devicedefaultsto read

array mode.Manipulationof externalmemorycontrolpins

allowarray read,standbyandoutputdisableoperations.

Status register and identifier codes can be accessed

throughthe CUI independentof the Vccw voltage. High

voltageon Vccw enablessuccessfubllock erase,full chip

erase,word/byte write and lock-bit configurations.All

functionsassociatedwith alteringmemorycontents-block

:rase, full chip erase. word/byte write. lock-bit

:onfiguration, statusandidentifier codes-areaccessedvia

he CUI andverified throughthestatusregister.

Commandsare written using standard microprocessor

vrite timings. The CUI contentsserve as input to the

WSM, which controls the block erase.full chip erase,

vord/byte write and lock-bit configuration. The internal

tlgorithms are regulatedby the WSM, including pulse

,epetition, internal verification and margining of data.

iddressesand data are internally latched during write

:ycles. Writing the appropriatecommandoutputs array

lata.accessetshe identifier codesor outputsstatusregister

lata.

nterfacesoftwarethat initiatesandpollsprogressof block

‘rase. full chip erase, word/byte write and lock-bit

onfiguration can be stored in any block. This code is

opied to and executed from systemRAIM during flash

nemory updates.After successful completion,readsare

gain possiblevia the ReadArray command.Block erase

uspendallowssystemsoftwareto suspenda block erase

I read/writedata from/to blocksother than that which is

uspend.Word/byte write suspendallowssystemsoftware

I suspenda word/byte write to readdatafrom any other

lashmemoryarray location.

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7FFFF

780X

77m

7oM

6FFFF

68oMl

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58Mo

57FFF

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48*M

J7FFF

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38mi,

37FFF

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27FFF

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Top Boot

B Main Block

32KWlhAKB

Mam Block

23

32KW/6-lKB

Xlam Block

32KWNKB

,Mun Block

28

Figure3. Memory ~Map

Rev. 1.35

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