MX29F001TTC-12 データシートの表示（PDF） - Macronix International

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MX29F001TTC-12

1M-BIT [128K x 8] CMOS FLASH MEMORY

Macronix International 

MX29F001T/B

SECTOR ERASE COMMANDS

The Automatic Sector Erase does not require the

device to be entirely pre-programmed prior to

executing the Automatic Set-up Sector Erase

command and Automatic Sector Erase command.

Upon executing the Automatic Sector Erase command,

the device will automatically program and verify the

sector(s) memory for an all-zero data pattern. The

system does not require to provide any control or

timing during these operations.

When the sector(s) is automatically verified to contain

an all-zero pattern, a self-timed sector erase and

verification begin. The erase and verification

operations are complete when the data on Q7 is "1"

and the data on Q6 stops toggling for two consecutive

read cycles, at which time the device returns to the

Read mode. The system does not require to provide

any control or timing during these operations.

When using the Automatic Sector Erase algorithm, note

that the erase automatically terminates when adequate

erase margin has been achieved for the memory array

(no erase verification command is required). Sector

erase is a six-bus cycle operation. There are two

"unlock" write cycles. These are followed by writing the

set-up command 80H. Two more "unlock" write cycles

are then followed by the sector erase command 30H.

The sector address is latched on the falling edge of WE,

while the command(data) is latched on the rising edge

of WE. Sector addresses selected are loaded into

internal register on the sixth falling edge of WE. Each

successive sector load cycle started by the falling edge

of WE must begin within 30us from the rising edge of

the preceding WE. Otherwise, the loading period ends

and internal auto sector erase cycle starts. (Monitor Q3

to determine if the sector erase timer window is still

open, see section Q3, Sector Erase Timer.) Any

command other than Sector Erase (30H) or Erase

Suspend (B0H) during the time-out period resets the

derice to read mode.

ERASE SUSPEND

This command only has meaning while the state ma-

chine is executing Automatic Sector Erase operation,

and therefore will only be responded during Automatic

Sector Erase operation. Writing the Erase Suspend

command during the Sector Erase time-out immediately

terminates the time-out immediately terminates the

time-out period and suspends the erase operation.

After this command has been executed, the command

register will initiate erase suspend mode. The state

machine will return to read mode automatically after

suspend is ready. At this time, state machine only

allows the command register to respond to the Read

Memory Array, Erase Resume and Program com-

mands.

The system can determine the status of the program

operation using the Q7 or Q6 status bits, just as in the

standard program operation. After an erase-suspend

program operation is complete, the system can once

again read array data within non-suspended sectors.

P/N: PM0515

REV. 2.1, JUN. 14, 2001

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