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UPD70F3214 Datasheet(PDF) 10 Page - NEC |
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UPD70F3214 Datasheet(HTML) 10 Page - NEC |
10 / 861 page User’s Manual U16890EJ1V0UD 10 4.3.9 Port CS ........................................................................................................................................ 125 4.3.10 Port CT ........................................................................................................................................ 127 4.3.11 Port DH ........................................................................................................................................ 129 4.3.12 Port DL......................................................................................................................................... 131 4.4 Block Diagrams ........................................................................................................................ 134 4.5 Port Register Setting When Alternate Function Is Used...................................................... 160 4.6 Cautions .................................................................................................................................... 166 4.6.1 Cautions on bit manipulation instruction for port n register (Pn) .................................................. 166 4.6.2 Hysteresis characteristics ............................................................................................................ 167 CHAPTER 5 BUS CONTROL FUNCTION .......................................................................................... 168 5.1 Features .................................................................................................................................... 168 5.2 Bus Control Pins ...................................................................................................................... 169 5.2.1 Pin status when internal ROM, internal RAM, or on-chip peripheral I/O is accessed................... 170 5.2.2 Pin status in each operation mode............................................................................................... 170 5.3 Memory Block Function........................................................................................................... 171 5.3.1 Chip select control function.......................................................................................................... 172 5.4 External Bus Interface Mode Control Function..................................................................... 172 5.5 Bus Access ............................................................................................................................... 173 5.5.1 Number of clocks for access........................................................................................................ 173 5.5.2 Bus size setting function .............................................................................................................. 173 5.5.3 Access by bus size ...................................................................................................................... 174 5.6 Wait Function............................................................................................................................ 181 5.6.1 Programmable wait function ........................................................................................................ 181 5.6.2 External wait function................................................................................................................... 182 5.6.3 Relationship between programmable wait and external wait ....................................................... 183 5.6.4 Programmable address wait function........................................................................................... 184 5.7 Idle State Insertion Function ................................................................................................... 185 5.8 Bus Hold Function ................................................................................................................... 186 5.8.1 Functional outline......................................................................................................................... 186 5.8.2 Bus hold procedure...................................................................................................................... 187 5.8.3 Operation in power save mode .................................................................................................... 187 5.9 Bus Priority ............................................................................................................................... 188 5.10 Bus Timing................................................................................................................................ 189 5.11 Cautions .................................................................................................................................... 195 CHAPTER 6 CLOCK GENERATION FUNCTION............................................................................... 196 6.1 Overview ................................................................................................................................... 196 6.2 Configuration............................................................................................................................ 197 6.3 Registers ................................................................................................................................... 199 6.4 Operation .................................................................................................................................. 203 6.4.1 Operation of each clock ............................................................................................................... 203 6.4.2 Clock output function ................................................................................................................... 203 6.4.3 External clock input function ........................................................................................................ 203 6.5 PLL Function ............................................................................................................................ 204 6.5.1 Overview...................................................................................................................................... 204 6.5.2 Register ....................................................................................................................................... 204 6.5.3 Usage .......................................................................................................................................... 205 |
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