IMC010FLSA datasheet(13/39 Pages) INTEL

13 / 39 page

SERIES 2 FLASH MEMORY CARDS

WRITE PROTECTION REGISTER

(ReadWrite Register)

ADDRESS

BIT 7

BIT 6

BIT 5

BIT 4

BIT 3

BIT 2

BIT 1

BIT 0

4104H

RESERVED FOR FUTURE USE

CMWP

CISWP

1 e WRITE PROTECT

Figure 8 WRITE PROTECTION REGISTER (Intel) Eliminates Accidental Data Corruption

SLEEP CONTROL REGISTER (INTEL)

Unlike the GLOBAL RESET-POWERDOWN REGIS-

TER which simultaneously resets and places all

flash memory devices into a Deep-Sleep mode the

SLEEP CONTROL REGISTER (Attribute Memory

Plane Address 4118H – 411AH Figure 9) allows se-

lective power-down control of individual device pairs

Writinga1toa specific bit of the SLEEP CONTROL

into the ‘‘Deep-Sleep’’ mode

Devices in Deep-Sleep

are not accessible

On cards with fewer than

20 Megabytes (10 device pairs) writing a one to an

absent device pair has no affect and reads back as

zero

This register contains all zeroes (ie

not in Deep-

Sleep mode) when the card powers up or after a

hard or soft reset Furthermore the Global Reset-

PowerDown Register has no affect on the contents

of this register Therefore any bit settings of the

Sleep Control Register will remain unchanged after

returning from a global reset and power down (writ-

ing a zero to the RP bit of the Global Reset-Power-

Down Register)

READY-BUSY STATUS

The bits in the Read-only READY-BUSY Status

4134H Figure 10) reflect the status (READYe1

BUSYe0) of each device’s RYBY

output A busy

condition indicates that a device is currently pro-

cessing a data-write or block-erase operation

These bits are logically ‘‘AND-ed’’ to form the

ReadyBusy output (RDYBSY

pin 16) of the

PCMCIA interface On memory cards with fewer

than 20 devices unused Device RYBY

Status

SLEEP CONTROL REGISTER

(ReadWrite Register)

ADDRESS

BIT 7

BIT 6

BIT 5

BIT 4

BIT 3

BIT 2

BIT 1

BIT 0

411AH

RESERVED

DEVICES

1819

1617

4118H

DEVICES

1415

1213

1011

1 e SELECTED DEVICE PAIR IN POWER-DOWN MODE AND RESET

Figure 9 SLEEP CONTROL REGISTER (Intel) Allows Specific

Devices to be Reset and Put into Power-Down Mode

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