MX28F640C3TXAI-12 datasheet(11/44 Pages) MCNIX

Part #	MX28F640C3TXAI-12

Description	64M-BIT [4M x16] CMOS SINGLE VOLTAGE 3V ONLY FLASH MEMORY

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Manufacturer	MCNIX [Macronix International]

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P/N:PM0900

MX28F640C3T/B

REV. 0.6, AUG. 20, 2003

and output high impedance state.

In read modes, RESET-low deselects the memory,

places output drivers in a high-impedance state and turns

off all internal circuits. RESET must be held low for a

minimum of 100ns. Time tPHQV is required after return

from reset mode until initial memory access outputs are

valid. After this wake-up interval tPHEL or tPHWL, nor-

mal operation is restored. The CUI is reset to read array

mode and status register is set to 80H. Sector lock bit is

set at lock status.

During sector erase, word write or sector lock/unlock

modes, RESET-low will abort the operation. Memory con-

tents being altered are no longer valid; the data may be

partially erased or written.

In addition, CUI will go into either array read mode or

erase/write interrupted mode. When power is up and the

device reset subsequently, it is necessary to read sta-

tus register in order to assure the status of the device.

Recognizing status register (SR.7~0) will assure if the

device goes back to normal reset and enters array read

mode.

3.5 Read Configuration Codes

The read configuration codes operation outputs the manu-

facturer code, device code, sector lock configuration

codes, and the protection register Using the manufac-

turer and device codes, the system CPU can automati-

cally match the device with its proper algorithms. The

sector lock codes identify locked and unlocked sectors.

3.6 Write

Writing commands to the CUI enable reading of device

data and identifier codes. They also control inspection

and clearing of the status register.When VCC=2.7V-3.6V

and VPP=VPPH1/2, the CUI additionally controls sec-

tor erase, full chip erase, word write and sector lock/

unlock.

The Sector Erase command requires appropriate com-

mand data and an address within the sector to be erased.

The Full Chip Erase command requires appropriate com-

mand data and an address within the device. The Word

Write command requires the command and address of

the location to be written. Set Sector lock/unlock com-

mands require the command and address within the de-

vice or sector within the device (Sector Lock) to be

locked. The Clear Sector Lock-Bits command requires

the command and address within the device.

The CUI does not occupy an addressable memory loca-

tion. It is written when WE and CE are active (whichever

goes high first). The address and data needed to ex-

ecute a command are latched on the rising edge of WE

or CE. Standard microprocessor write timings are used.

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MX28F640C3TXAI-12 Datasheet(PDF) 11 Page - Macronix International

MX28F640C3TXAI-12 Datasheet(HTML) 11 Page - Macronix International

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