MX25L3205A
POWER-ON STATE
The device is at below states when power-up:
- Standby mode ( please note it is not deep power-down mode)
- Write Enable Latch (WEL) bit is reset
The device must not be selected during power-up and power-down stage unless the VCC achieves below correct level:
- VCC minimum at power-up stage and then after a delay of tVSL
-GNDatpower-down
Please note that a pull-up resistor on CS# may ensure a safe and proper power-up/down level.
Aninternalpower-onreset(POR)circuitmayprotectthedevicefromdatacorruptionandinadvertentdatachangeduring
powerupstate.WhenVCCislowerthanVWI(PORthresholdvoltagevalue),theinternallogicisresetandtheflashdevice
has no response to any command.
For further protection on the device, after VCC reaching the VWI level, a tPUW time delay is required before the device
isfullyaccessibleforcommandslikewriteenable(WREN),pageprogram(PP),sectorerase(SE),chiperase(CE)andwrite
status register(WRSR). If the VCC does not reach the VCC minimum level, the correct operation is not guaranteed. The
write, erase, and program command should be sent after the below time delay:
- tPUW after VCC reached VWI level
- tVSL after VCC reached VCC minimum level
The device can accept read command after VCC reached VCC minimum and a time delay of tVSL, even time of tPUW
has not passed.
Please refer to the figure of "power-up timing".
Note:
- To stabilize the VCC level, the VCC rail decoupled by a suitable capacitor close to package pins is
recommended.(generallyaround0.1uF)
- At power-down stage, the VCC drops below VWI level, all operations are disable and device has no response to any
command. The data corruption might occur during the stage while a write, program, erase cycle is in progress.
P/N:PM1243
REV. 1.2, NOV. 06, 2006
17
Macronix [ MACRONIX INTERNATIONAL ]
