MX25L4005M2C-15G Ver la hoja de datos (PDF) - Macronix International

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MX25L4005M2C-15G

4M-BIT [x 1] CMOS SERIAL FLASH

Macronix International 

MX25L4005

POWER-ON STATE

At Power-up and Power-down, the device must not be selected (that is Chip Select (CS#) must follow the voltage applied

on VCC) until VCC reaches the correct value:

- VCC(min) at Power-up, and then for a further delay of tVSL

- VSS at Power-down

Usually a simple pull-up resistor on Chip Select (CS#) can be used to insure safe and proper Power-up and Power-down.

To avoid data corruption and inadvertent write operations during power up, a Power On Reset (POR) circuit is included. The

logic inside the device is held reset while VCC is less than the POR threshold value, VWI --all operations are disabled, and

the device does not respond to any instruction.

Moreover, the device ignores all Write Enable (WREN), Page Program (PP), Sector Erase (SE), Block Erase (BE), Chip

Erase (CE) and Write Status Register (WRSR) instructions until a time delay of tPUW has elapsed after the moment that

VCC rises above the VWI threshold. However, the correct operation of the device is not guaranteed if, by this time, VCC is

still below VCC(min). No Write Status Register, Program or Erase instructions should be sent until the later of:

- tPUW after VCC passed the VWI threshold

- tVSL after VCC passed the VCC(min) level

These values are specified in Table 7.

If the delay, tVSL, has elapsed, after VCC has risen above VCC(min), the device can be selected for READ instructions even

if the tPUW delay is not yet fully elapsed.

At Power-up, the device is in the following state:

- The device is in the Standby mode (not the Deep Power-down mode).

- The Write Enable Latch (WEL) bit is reset.

Normal precautions must be taken for supply rail decoupling, to stabilize the VCC feed. Each device in a system should

have the VCC rail decoupled by a suitable capacitor close to the package pins. (Generally, this capacitor is of the order of

0.1uF).

At Power-down, when VCC drops from the operating voltage, to below the POR threshold value, VWI, all operations are

disabled and the device does not respond to any instruction. (The designer needs to be aware that if a Power-down occurs

while a Write, Program or Erase cycle is in progress, some data corruption can result.)

P/N: PM1236

REV. 1.1, SEP. 30, 2005

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