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UPD7564ACS Datasheet(PDF) 4 Page - NEC |
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UPD7564ACS Datasheet(HTML) 4 Page - NEC |
4 / 56 page 4 µPD7564A, 7564A(A) CONTENTS 1. PIN FUNCTIONS ......................................................................................................................................... 6 1.1 PORT FUNCTIONS ............................................................................................................................................... 6 1.2 OTHER THAN PORTS .......................................................................................................................................... 6 1.3 PIN MASK OPTION .............................................................................................................................................. 7 1.4 CAUTION ON USE OF P00/INT0 PIN AND RESET PIN ................................................................................... 7 1.5 PIN INPUT/OUTPUT CIRCUITS .......................................................................................................................... 8 1.6 RECOMMENDED CONNECTION OF UNUSED µPD7564A PINS .................................................................. 11 1.7 OPERATION OF INPUT/OUTPUT PORTS ....................................................................................................... 11 2. INTERNAL BLOCK FUNCTIONS ............................................................................................................ 13 2.1 PROGRAM COUNTER (PC): 10 BITS ................................................................................................................ 13 2.2 STACK POINTER (SP): 6 BITS .......................................................................................................................... 14 2.3 PROGRAM MEMORY (ROM): 1024 WORDS × 8 BITS ................................................................................... 15 2.4 GENERAL REGISTER ......................................................................................................................................... 15 2.5 DATA MEMORY (RAM): 64 × 4 BITS ............................................................................................................... 16 2.6 ACCUMULATOR (A): 4 BITS ............................................................................................................................. 17 2.7 ARITHMETIC LOGIC UNIT (ALU): 4 BITS ........................................................................................................ 17 2.8 PROGRAM STATUS WORD (PSW): 4 BITS .................................................................................................... 17 2.9 SYSTEM CLOCK GENERATOR ......................................................................................................................... 18 2.10 CLOCK CONTROL CIRCUIT ............................................................................................................................... 19 2.11 TIMER/EVENT COUNTER ................................................................................................................................. 20 2.12 SERIAL INTERFACE ........................................................................................................................................... 21 2.13 TEST CONTROL CIRCUIT .................................................................................................................................. 23 3. STANDBY FUNCTIONS ........................................................................................................................... 25 3.1 STOP MODE ........................................................................................................................................................ 25 3.2 CANCELLING THE HALT MODE ....................................................................................................................... 25 3.3 CANCELLING STOP MODE BY RESET INPUT ................................................................................................ 26 3.4 CANCELLING HALT MODE BY TEST REQUEST FLAG ................................................................................. 26 3.5 CANCELLING HALT MODE BY RESET INPUT ................................................................................................ 26 4. RESET FUNCTIONS ................................................................................................................................. 27 4.1 DETAILS OF INITIALIZATION ........................................................................................................................... 27 5. µPD7564A INSTRUCTION SET............................................................................................................... 28 6. ELECTRICAL SPECIFICATIONS .............................................................................................................. 33 7. CHARACTERISTICS CURVES .................................................................................................................. 40 8. µPD7564A APPLIED CIRCUITS ............................................................................................................... 43 9. PACKAGE INFORMATION ....................................................................................................................... 45 |
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