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UPD784938 Datasheet(PDF) 18 Page - NEC |
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UPD784938 Datasheet(HTML) 18 Page - NEC |
18 / 733 page ![]() 18 Preliminary User’s Manual U13987EJ1V0UM00 16.3 A/D Current Cut Select Register (IEAD) ............................................................................... 410 16.4 Operation .................................................................................................................................. 411 16.4.1 Basic A/D converter operation ..................................................................................................... 411 16.4.2 Select mode ................................................................................................................................. 415 16.4.3 Scan mode ................................................................................................................................... 416 16.4.4 A/D conversion operation start by software ................................................................................ 418 16.4.5 A/D conversion operation start by hardware .............................................................................. 420 16.5 External Circuit of A/D Converter .......................................................................................... 423 16.6 Cautions .................................................................................................................................... 423 CHAPTER 17 OUTLINE OF SERIAL INTERFACE ............................................................................ 425 CHAPTER 18 ASYNCHRONOUS SERIAL INTERFACE/3-WIRE SERIAL I/O ............................... 427 18.1 Switching between Asynchronous Serial Interface Mode and 3-Wire Serial I/O Mode . 428 18.2 Asynchronous Serial Interface Mode ................................................................................... 429 18.2.1 Configuration in asynchronous serial interface mode ................................................................ 429 18.2.2 Asynchronous serial interface control registers ......................................................................... 432 18.2.3 Data format ................................................................................................................................... 435 18.2.4 Parity types and operations ......................................................................................................... 436 18.2.5 Transmission ................................................................................................................................ 437 18.2.6 Reception ..................................................................................................................................... 438 18.2.7 Receive errors .............................................................................................................................. 439 18.3 3-Wire Serial I/O Mode ............................................................................................................ 440 18.3.1 Configuration in 3-wire serial I/O mode ...................................................................................... 440 18.3.2 Clocked serial interface mode registers (CSIM1, CSIM2) ......................................................... 443 18.3.3 Basic operation timing ................................................................................................................. 444 18.3.4 Operation when transmission only is enabled ............................................................................ 446 18.3.5 Operation when reception only is enabled ................................................................................. 446 18.3.6 Operation when transmission/reception is enabled ................................................................... 447 18.3.7 Corrective action in case of slippage of serial clock and shift operations ................................ 447 18.4 Baud Rate Generator ............................................................................................................... 448 18.4.1 Baud rate generator configuration .............................................................................................. 448 18.4.2 Baud rate generator control register (BRGC, BRGC2) .............................................................. 450 18.4.3 Baud rate generator operation .................................................................................................... 452 18.4.4 Baud rate setting in asynchronous serial interface mode .......................................................... 454 18.5 Cautions .................................................................................................................................... 456 CHAPTER 19 3-WIRE SERIAL I/O MODE ......................................................................................... 457 19.1 Function .................................................................................................................................... 457 19.2 Configuration ............................................................................................................................ 458 19.3 Control Registers ..................................................................................................................... 459 19.3.1 Clocked serial interface mode register (CSIM, CSIM3) ............................................................. 459 19.4 3-Wire Serial I/O Mode ............................................................................................................ 461 19.4.1 Basic operation timing ................................................................................................................. 462 19.4.2 Operation when transmission only is enabled ............................................................................ 464 19.4.3 Operation when reception only is enabled ................................................................................. 465 19.4.4 Operation when transmission/reception is enabled ................................................................... 465 19.4.5 Corrective action in case of slippage of serial clock and shift operations ................................ 465 |
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