NEC uPD78056Y - Manual (Page 22)

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CHAPTER 18 SERIAL INTERFACE CHANNEL 1 ............................................................................ 393
18.1 Serial Interface Channel 1 Functions .............................................................................. 393
18.2 Serial Interface Channel 1 Configuration ....................................................................... 394
18.3 Serial Interface Channel 1 Control Registers ................................................................. 397
18.4 Serial Interface Channel 1 Operations ............................................................................ 405
18.4.1 Operation stop mode ........................................................................................................... 405
18.4.2 3-wire serial I/O mode operation ......................................................................................... 406
18.4.3 3-wire serial I/O mode operation with automatic transmit/receive function ......................... 409
CHAPTER 19 SERIAL INTERFACE CHANNEL 2 ............................................................................ 439
19.1 Serial Interface Channel 2 Functions .............................................................................. 439
19.2 Serial Interface Channel 2 Configuration ....................................................................... 440
19.3 Serial Interface Channel 2 Control Registers ................................................................. 444
19.4 Serial Interface Channel 2 Operation .............................................................................. 452
19.4.1 Operation stop mode ........................................................................................................... 452
19.4.2 Asynchronous serial interface (UART) mode ...................................................................... 454
19.4.3 3-wire serial I/O mode ......................................................................................................... 467
19.4.4 Limitations when UART mode is used ................................................................................. 474
CHAPTER 20 REAL-TIME OUTPUT PORT ...................................................................................... 477
20.1 Real-Time Output Port Functions .................................................................................... 477
20.2 Real-Time Output Port Configuration ............................................................................. 478
20.3 Real-Time Output Port Control Registers ....................................................................... 480
CHAPTER 21 INTERRUPT AND TEST FUNCTIONS ....................................................................... 483
21.1 Interrupt Function Types .................................................................................................. 483
21.2 Interrupt Sources and Configuration .............................................................................. 484
21.3 Interrupt Function Control Registers .............................................................................. 488
21.4 Interrupt Servicing Operations ........................................................................................ 497
21.4.1 Non-maskable interrupt request acknowledge operation .................................................... 497
21.4.2 Maskable interrupt request acknowledge operation ............................................................ 500
21.4.3 Software interrupt request acknowledge operation ............................................................. 503
21.4.4 Multiple interrupt servicing ................................................................................................... 503
21.4.5 Interrupt request reserve ..................................................................................................... 506
21.5 Test Functions ................................................................................................................... 507
21.5.1 Registers controlling the test function .................................................................................. 507
21.5.2 Test input signal acknowledge operation ............................................................................. 509
CHAPTER 22 EXTERNAL DEVICE EXPANSION FUNCTION ......................................................... 511
22.1 External Device Expansion Functions ............................................................................ 511
22.2 External Device Expansion Function Control Register ................................................. 516
22.3 External Device Expansion Function Timing ................................................................. 518
22.4 Example of Connection with Memory ............................................................................. 523
CHAPTER 23 STANDBY FUNCTION ................................................................................................ 525
23.1 Standby Function and Configuration .............................................................................. 525
23.1.1 Standby function .................................................................................................................. 525
23.1.2 Standby function control register ......................................................................................... 526