DS89C430/DS89C450 Ultra-High-Speed Flash Microcontrollers

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REVISION HISTORY

DATE

DESCRIPTION

111003

New product release.

032204

DC Electrical Characteristics table: Corrected typo—Under Supply Current for Active and Idle Mode,

changed Units from “

A” to “mA.”

Note 15: Changed number of external clock cyles per system clock and minimum external clock

speeds.

Flash Memory Programming Characteristics table: Removed Note 20 (room temperature only) from the

Data Retention parameter.

060204

Changed Write/Erase Endurance parameter from 20,000 cycles to 10,000 cycles.

Removed original Table 5. Parallel Programming Instruction Set, and replaced it with a paragraph

introducing the subject and advising interested parties to contact the factory for more information.

Clarified IAP programming sequence.

060805

Added lead-free devices to Ordering Information table.

091906

Removed references to DS89C440 and/or added “Contact factory or replace with DS89C430 or

DS89C450.”

040507

Added clarification to the Security Features section and Table 3 that flash security levels 1, 2, and 3

should not be used when executing external code (page 22); corrected Figure 8 to show PSEN high

through the second machine cycle (page 28).

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circuit patent licenses are implied. Maxim/Dallas Semiconductor reserves the right to change the circuitry and specifications without notice at any time.

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