MX29LV640BB View Datasheet(PDF) - Macronix International

Part Name

Description

Manufacturer

MX29LV640BB

64M-BIT [8M x 8/4M x 16] SINGLE VOLTAGE 3V ONLY FLASH MEMORY

Macronix International 

MX29LV640BT/BB

than Sector Erase(30H) or Erase Suspend(B0H) during

the time-out period resets the device 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. When the Erase Suspend command is

issued during the sector erase operation, the device re-

quires a maximum 20us to suspend the sector erase

operation. However, When the Erase Suspend command

is written during the sector erase time-out, the device

immediately terminates the time-out period and suspends

the erase operation. After this command has been ex-

ecuted, the command register will initiate erase suspend

mode. The state machine will return to read mode auto-

matically after suspend is ready. At this time, state ma-

chine only allows the command register to respond to the

Erase Resume, program data to, or read data from any

sector not selected for erasure.

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 pro-

gram operation is complete, the system can once again

read array data within non-suspended blocks.

The single cycle Query command is valid only when the

device is in the Read mode, including Erase Suspend,

Standby mode, and Read ID mode; however, it is ignored

otherwise.

The Reset command exits from the CFI mode to the Read

mode, or Erase Suspend mode, or read ID mode. The

command is valid only when the device is in the CFI

mode.

ERASE RESUME

This command will cause the command register to clear

the suspend state and return back to Sector Erase mode

but only if an Erase Suspend command was previously

issued. Erase Resume will not have any effect in all

other conditions. Another Erase Suspend command can

be written after the chip has resumed erasing.

QUERY COMMAND AND COMMON FLASH

INTERFACE (CFI) MODE

MX29LV640BT/BB is capable of operating in the CFI

mode. This mode all the host system to determine the

manufacturer of the device such as operating parameters

and configuration. Two commands are required in CFI

mode. Query command of CFI mode is placed first, then

the Reset command exits CFI mode. These are described

in Table 3.

P/N:PM1076

REV. 1.2, SEP. 07, 2005

25

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