22
17.4 Serial Interface Operations .................................................................................................
17.4.1 Operation stop mode..................................................................................................................
17.4.2 3-wire serial I/O mode ................................................................................................................
289
289
290
CHAPTER 18 SERIAL INTERFACE (IIC0) (
μ
PD780024Y, 780034Y SUBSERIES ONLY) ............
293
18.1 Serial Interface Functions ...................................................................................................
18.2 Serial Interface Configuration.............................................................................................
18.3 Registers to Control Serial Interface..................................................................................
18.4 I
2
C Bus Mode Functions .....................................................................................................
18.4.1 Pin configuration.........................................................................................................................
18.5 I
2
C Bus Definitions and Control Methods .........................................................................
18.5.1 Start conditions ..........................................................................................................................
18.5.2 Addresses ..................................................................................................................................
18.5.3 Transfer direction specification...................................................................................................
18.5.4 Acknowledge (ACK) signal.........................................................................................................
18.5.5 Stop condition ............................................................................................................................
18.5.6 Wait signal (WAIT)......................................................................................................................
18.5.7 I
2
C interrupt requests (INTIIC0) .................................................................................................
18.5.8 Interrupt request (INTIIC0) generation timing and wait control ..................................................
18.5.9 Address match detection method...............................................................................................
18.5.10 Error detection..........................................................................................................................
18.5.11 Extension code .........................................................................................................................
18.5.12 Arbitration .................................................................................................................................
18.5.13 Wake up function......................................................................................................................
18.5.14 Communication reservation .....................................................................................................
18.5.15 Other cautions ..........................................................................................................................
18.5.16 Communication operations ......................................................................................................
18.6 Timing Charts.......................................................................................................................
293
296
297
306
306
307
307
308
308
309
310
311
313
332
333
333
333
334
335
336
338
339
341
CHAPTER 19 INTERRUPT FUNCTIONS ........................................................................................
349
19.1 Interrupt Function Types.....................................................................................................
19.2 Interrupt Sources and Configuration .................................................................................
19.3 Interrupt Function Control Registers.................................................................................
19.4 Interrupt Servicing Operations ...........................................................................................
19.4.1 Non-maskable interrupt request acknowledge operation ...........................................................
19.4.2 Maskable interrupt acknowledge operation................................................................................
19.4.3 Software interrupt request acknowledge operation ....................................................................
19.4.4 Multiple interrupt servicing .........................................................................................................
19.4.5 Interrupt request hold .................................................................................................................
349
349
353
359
359
362
364
365
368
CHAPTER 20 EXTERNAL DEVICE EXPANSION FUNCTION ....................................................
369
20.1 External Device Expansion Function.................................................................................
20.2 External Device Expansion Function Control Register....................................................
20.3 External Device Expansion Function Timing ....................................................................
20.4 Example of Connection with Memory ................................................................................
369
372
374
379