Document
Nuvoton 8-bit 8051-based Microcontroller
N78E059A/N78E055A
Data Sheet
N78E059A/N78E055A Data Sheet
CONTENTS
1. DESCRIPTION .................................................................................................................................................. 4 2. FEATURES ....................................................................................................................................................... 5 3. BLOCK DIAGRAM ............................................................................................................................................ 7 4. PIN CONFIGURATIONS................................................................................................................................... 8 5. MEMORY ORGANIZATION............................................................................................................................14
5.1 Internal Program Memory .................................................................................................................14 5.2 External Program Memory ................................................................................................................16 5.3 Internal Data Memory .......................................................................................................................17 5.4 On-chip XRAM ..................................................................................................................................19 5.5 External Data Memory ......................................................................................................................19 5.6 On-chip Non-volatile Data Flash .......................................................................................................20 6. SPECIAL FUNCTION REGISTER (SFR) .......................................................................................................22 7. GENERAL 80C51 SYSTEM CONTROL .........................................................................................................25 8. AUXILIARY RAM (XRAM)...............................................................................................................................29 9. I/O PORT STRUCTURE AND OPERATION ..................................................................................................31 10. TIMERS/COUNTERS....................................................................................................................................35 10.1 Timer/Counters 0 and 1 ..................................................................................................................35
10.1.1 Mode 0 (13-bit Timer) ......................................................................................................37 10.1.2 Mode 1 (16-bit Timer) ......................................................................................................38 10.1.3 Mode 2 (8-bit Auto-reload Timer) ................................................