79C0832 Datasheet, PDF(12/19 Page) Maxwell Technologies – 8 Megabit (256K x 32-Bit) EEPROM MCM

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79C0832 Datasheet, PDF (12/19 Pages) Maxwell Technologies – 8 Megabit (256K x 32-Bit) EEPROM MCM

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8 Megabit (256K x 32-Bit) EEPROM MCM

79C0832

Data Polling

Data Polling function allows the status of the EEPROM to be determined. If EEPROM is set to read mode during a

write cycle, an inversion of the last byte of data to be loaded outputs from I/O 7 to indicate that the EEPROM is per-

forming a write operation.

RDY/Busy Signal

RDY/Busy signal also allows a comparison operation to determine the status of the EEPROM. The RDY/Busy signal

goes low (VOL) after the first write signal. At the end of the write cycle, the RDY/Busy returns to a high state ( VOH).

RES Signal

When RES is LOW (VL), the EEPROM cannot be read or programmed. The EEPROM data must be protected by

keeping RES low when VCC is power on and off. RES should be high (VH) during read and programming operations.

Data Protection

To protect the data during operation and power on/off, the EEPROM has the internal functions described below.

1. Data Protection against Noise of Control Pins (CE, OE, WE) during Operation.

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

mode by mistake. 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 more than 20ns on the control

pins.

01.10.05 Rev 14

All data sheets are subject to change without notice 12

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