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UPD75237 Datasheet(PDF) 5 Page - NEC |
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UPD75237 Datasheet(HTML) 5 Page - NEC |
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5 / 191 page  5 µPD75237 CONTENTS 1. PIN FUNCTIONS ......................................................................................................................................... 7 1.1 PORT PINS ........................................................................................................................................................... 7 1.2 NON-PORT PINS .................................................................................................................................................. 9 1.3 PIN INPUT/OUPUT CIRCUIT LIST ................................................................................................................... 11 1.4 RECOMMENDED CONNECTIONS OF µPD75237 UNUSED PINS ............................................................... 15 2. µPD75237 ARCHITECTURE AND MEMORY MAP................................................................................ 16 2.1 DATA MEMORY BANK CONFIGURATION AND ADDRESSING MODE ..................................................... 16 2.2 GENERAL REGISTER BANK CONFIGURATION ............................................................................................ 19 2.3 MEMORY MAPPED I/O .................................................................................................................................... 22 3. INTERNAL CPU FUNCTIONS .................................................................................................................. 28 3.1 PROGRAM COUNTER (PC): 15 BITS .............................................................................................................. 28 3.2 PROGRAM MEMORY (ROM): 24448 WORDS × 8 BITS ............................................................................... 28 3.3 DATA MEMORY ................................................................................................................................................ 30 3.4 GENERAL REGISTER: 8 × 4 BITS × 4 BANKS ............................................................................................... 32 3.5 ACCUMULATOR ............................................................................................................................................... 33 3.6 STACK POINTER (SP) AND STACK BANK SELECT REGISTER (SBS) ....................................................... 33 3.7 PROGRAM STATUS WORD (PSW): 8 BITS ................................................................................................... 36 3.8 BANK SELECT REGISTER (BS) ....................................................................................................................... 40 4. PERIPHERAL HARDWARE FUNCTIONS ............................................................................................... 41 4.1 DIGITAL INPUT/OUTPUT PORTS ................................................................................................................... 41 4.2 CLOCK GENERATOR ........................................................................................................................................ 50 4.3 CLOCK OUTPUT CIRCUIT ................................................................................................................................ 58 4.4 BASIC INTERVAL TIMER ................................................................................................................................. 61 4.5 TIMER/EVENT COUNTER ................................................................................................................................ 63 4.6 WATCH TIMER .................................................................................................................................................. 69 4.7 TIMER/PULSE GENERATOR ........................................................................................................................... 71 4.8 EVENT COUNTER ............................................................................................................................................. 77 4.9 SERIAL INTERFACE .......................................................................................................................................... 79 4.10 A/D CONVERTER ........................................................................................................................................... 113 4.11 BIT SEQUENTIAL BUFFER: 16 BITS ............................................................................................................. 119 4.12 FIP CONTROLLER/DRIVER ............................................................................................................................ 119 5. INTERRUPT FUNCTIONS ...................................................................................................................... 131 5.1 INTERRUPT CONTROL CIRCUIT CONFIGURATION ................................................................................... 131 5.2 INTERRUPT CONTROL CIRCUIT HARDWARE DEVICES ........................................................................... 133 5.3 INTERRUPT SEQUENCE ................................................................................................................................ 138 5.4 MULTI-INTERRUPT SERVICE CONTROL ..................................................................................................... 139 5.5 VECTOR ADDRESS SHARING INTERRUPT SERVICING .......................................................................... . 141 6. STANDBY FUNCTIONS ......................................................................................................................... 142 6.1 STANDBY MODE SETTING AND OPERATING STATE .............................................................................. 142 6.2 STANDBY MODE RELEASE .......................................................................................................................... 144 6.3 OPERATION AFTER STANDBY MODE RELEASE ....................................................................................... 146 |
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