W921E400A Datasheet, PDF (2/53 Pages) Winbond – 4-BIT MICROCONTROLLER

W921E400A/W921C400
6.12 Operating Mode ...............................................................................................................................31
6.12.1 Normal Mode: ........................................................................................................................31
6.12.2 Hold Mode: ............................................................................................................................31
6.12.3 Stop Mode: ............................................................................................................................34
6.13 Initial Condition Register of EPROM Program Method .....................................................................36
6.14 Reset.................................................................................................................................................36
6.14.1 Reset by RESET .....................................................................................................................36
6.14.2 Reset by Watch Dog Timer .....................................................................................................36
7. ABSOLUTION MAXIMUM RATINGS .......................................................................................................37
8. ELECTRICAL CHARACTERISTICS.........................................................................................................37
8.1 DC Characteristics .............................................................................................................................37
8.2 AC Characteristics .............................................................................................................................40
9. ADDRESSING MODE ..............................................................................................................................42
9.1 ROM Addressing Mode......................................................................................................................42
9.1.1 Indirect Call Addressing Mode: (1 word/2 cycles) .....................................................................42
9.1.2 Long Call/Jump Addressing Mode: (2 words/2 cycles)..............................................................42
9.2 RAM Addressing Mode ......................................................................................................................42
9.2.1 Direct Addressing Mode: (2 words/2 cycles) .............................................................................43
9.2.2 Indirect Addressing Mode: (1 word / 1 cycle) ............................................................................43
9.2.3 Working Register Addressing Mode: (1 word / 1 cycle).............................................................43
9.3 Look-up Table Addressing Mode (1 word/2 cycles) ...........................................................................43
10. INSTRUCTION CODE MAP ...................................................................................................................45
11. INSTRUCTION SET SUMMARY ............................................................................................................48
12. PACKAGE DIMENSIONS........................................................................................................................52
28-pin DIP .................................................................................................................................................52
28-pin SOP ...............................................................................................................................................52
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