Document Revision History
Changes from 4235A -
04/03 to 4135B - 06/03
1. VIH min changed from 0.2 VCC + 1.1 to 0.2 VCC + 0.9.
2. Added POR/PFD and reset specific sections.
3. Added DIL40 package.
4. Added Flash write programming time specification.
Changes from 4235B -
06/03 to 4235C - 08/03
1. Changed maximum frequency to 60 MHz in X1 mode and 30 MHz in X2 mode
for Vcc = 4.5V to 5.5V and internal code execution.
2. Added PDIL40 Packaging for AT89C51ED2.
Changes from 4235C -
08/03 to 4235D - 12/03
1. Improved explanations throughout the document.
Changes from 4235D -
12/03 to 4235E - 04/04
1. Improved explanations throughout the document.
Changes from 4235E -
04/04 to 4235F - 09/04
1. Improved explanations in Flash and EEPROM sections.
Changes from 4235F -
09/04 to 4235G 08/05
1. Added ‘Industrial & Green” product versions.
Changes from 4235G
08/05 to 4235H - 10/06
1. Correction to PDIL figure on page 9.
Changes from 4235H -
10/06 to 4235I - 04/07
1. Removal of PDIL40 package offering.

Больше не выпускают в DIP40