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UPD62MC Datasheet(PDF) 4 Page - NEC |
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UPD62MC Datasheet(HTML) 4 Page - NEC |
4 / 64 page 4 µPD62 Data Sheet U14208EJ1V0DS00 TABLE OF CONTENTS 1. PIN FUNCTIONS ......................................................................................................................... 6 1.1 List of Pin Functions ......................................................................................................................... 6 1.2 INPUT/OUTPUT Circuits of Pins ...................................................................................................... 7 1.3 Dealing with Unused Pins ................................................................................................................ 8 2. INTERNAL CPU FUNCTIONS .................................................................................................... 9 2.1 Program Counter (PC) ...................................................................................................................... 9 2.2 Stack Pointer (SP) ............................................................................................................................. 9 2.3 Address Stack Register (ASR (RF)) ................................................................................................. 9 2.4 Program Memory (ROM) ................................................................................................................... 10 2.5 Data Memory (RAM) .......................................................................................................................... 10 2.6 Data Pointer (DP) ............................................................................................................................... 11 2.7 Accumulator (A) ................................................................................................................................ 11 2.8 Arithmetic and Logic Unit (ALU) ...................................................................................................... 12 2.9 Flags ................................................................................................................................................... 12 2.9.1 Status flag (F) .......................................................................................................................... 12 2.9.2 Carry flag (CY) ........................................................................................................................ 13 3. PORT REGISTERS (PX) ............................................................................................................. 14 3.1 KI/O Port (P0) ....................................................................................................................................... 15 3.2 KI Port/Special Ports (P1) ................................................................................................................. 16 3.2.1 KI port (P11: bits 4-7 of P1) ...................................................................................................... 16 3.2.2 S0 port (bit 2 of P1) .................................................................................................................. 16 3.2.3 S1/LED (bit 3 of P1) ................................................................................................................. 16 3.3 Control Register 0 (P3) ..................................................................................................................... 17 3.4 Control Register 1 (P4) ..................................................................................................................... 18 4. TIMER ......................................................................................................................................... 19 4.1 Timer Configuration .......................................................................................................................... 19 4.2 Timer Operation ................................................................................................................................. 20 4.3 Carrier Output .................................................................................................................................... 21 4.4 Software Control of Timer Output ................................................................................................... 21 5. STANDBY FUNCTION ................................................................................................................ 22 5.1 Outline of Standby Function ............................................................................................................ 22 5.2 Standby Mode Setup and Release ................................................................................................... 23 5.3 Standby Mode Release Timing ........................................................................................................ 24 6. RESET PIN .................................................................................................................................. 26 7. POC CIRCUIT (MASK OPTION) ................................................................................................ 27 7.1 Functions of POC Circuit .................................................................................................................. 28 7.2 Oscillation Check at Low Supply Voltage ....................................................................................... 28 8. SYSTEM CLOCK OSCILLATION CIRCUIT ............................................................................... 29 |
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