28C011TRPFB12 データシートの表示（PDF） - MAXWELL TECHNOLOGIES

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28C011TRPFB12

1 Megabit (128K x 8-Bit) EEPROM

MAXWELL TECHNOLOGIES 

1 Megabit (128K x 8-Bit) EEPROM

28C011T

During readout or standby, noise on the control pins may act as a trigger and turn the EEPROM to programming mode by mis-

take. To prevent this phenomenon, the EEPROM has a noise cancellation function that cuts noise if its width is 20ns or less in

programming mode. Be careful not to allow noise of a width of more than 20ns on the control pins.

2. Data Protection at VCC on/off

When VCC is turned on or off, noise on the control pins generated by external circuits, such as CPUs, may turn the EEPROM to

programming mode by mistake. To prevent this unintentional programming, the EEPROM must be kept in unprogrammable

state during VCC on/off by using a CPU reset signal to RES pin.

RES should be kept at VSS level when VCC is turned on or off. The EEPROM breaks off programming operation when RES

become low, programming operation doesn’t finish correctly in case that RES falls low during programming operation. RES

should be kept high for 10 ms after the last data input.

3. Software Data Protection

11.10.03 REV 10

All data sheets are subject to change without notice 14

©2003 Maxwell Technologies

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