4-BIT MICROCONTROLLER
W921E840A/W921C840
4-BIT MICROCONTROLLER
Table of Contents-
1. GENERAL DESCRIPTION ........................................
Description
W921E840A/W921C840
4-BIT MICROCONTROLLER
Table of Contents-
1. GENERAL DESCRIPTION .........................................................................................................................3 2. FEATURES.................................................................................................................................................3 3. PIN CONFIGURATIONS.............................................................................................................................6
40-pin DIP..................................................................................................................................................6 48-pin QFP.................................................................................................................................................7 4. PIN DESCRIPTION.....................................................................................................................................9 5. BLOCK DIAGRAM ....................................................................................................................................10 6. FUNCTIONAL DESCRIPTION .................................................................................................................11 6.1 ROM Memory Map ...........................................................................................................................11 6.2 RAM Memory Map..................................................................
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