W921E400A

W921E400A/W921C400 4-BIT MICROCONTROLLER Table of Contents- 1. GENERAL DESCRIPTION .........................................................................................................................3 2. FEATURES.................................................................................................................................................3 3. PIN CONFIGURATION ...............................................................................................................................5 4. PIN DESCRIPTION.....................................................................................................................................6 5. BLOCK DIAGRAM ......................................................................................................................................7 6. FUNCTION DESCRIPTION........................................................................................................................8 6.1 ROM Memory Map ..............................................................................................................................8 6.2 RAM Memory Map...............................................................................................................................9 6.2.1 Special Control Register Area ....................................................................................................9 6.2.2 Stack Register Area ................................................................................