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UPD72012 数据表(PDF) 6 Page - NEC |
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UPD72012 数据表(HTML) 6 Page - NEC |
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6 / 36 page ![]() 6 Data Sheet S13918EJ3V0DS µPD72012 CONTENTS 1. PIN FUNCTIONS ...................................................................................................................................................... 7 1.1 List of Pin Functions ......................................................................................................................................... 7 1.2 Tables by Pin Function ................................................................................................................................... 10 1.3 Equivalent Circuits of Pins.............................................................................................................................. 11 2. DESCRIPTORS ...................................................................................................................................................... 12 2.1 Standard Device Descriptor............................................................................................................................ 12 2.2 Standard Configuration Descriptor ................................................................................................................. 14 2.3 Standard Interface Descriptor......................................................................................................................... 16 2.4 Standard Endpoint Descriptor 1 ..................................................................................................................... 17 2.5 HUB Class Descriptor..................................................................................................................................... 17 2.6 Standard String Descriptor 0 .......................................................................................................................... 21 2.7 Standard String Descriptors 1 Through 5 ....................................................................................................... 21 3. ELECTRICAL SPECIFICATIONS .......................................................................................................................... 22 4. PACKAGE DRAWINGS ......................................................................................................................................... 32 5. RECOMMENDED SOLDERING CONDITIONS ..................................................................................................... 34 |
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