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14
User’s Manual U11302EJ4V0UM
15.7
Key Scan Flag and Key Scan Data .................................................................................. 314
15.7.1
Key scan flag........................................................................................................................... 314
15.7.2
Key scan data.......................................................................................................................... 314
Light Leakage of VFD......................................................................................................... 315
Display Examples ............................................................................................................... 317
15.9.1
Segment type (display mode 1: DSPM05 = 0) ...................................................................... 318
15.9.2
Dot type (display mode 1: DSPM05 = 0) ............................................................................... 320
15.9.3
Display type in which a segment spans two or more grids
(display mode 2: DSPM05 = 1) .............................................................................................. 322
15.10 Calculating Total Power Dissipation............................................................................... 326
15.10.1 Segment type (display mode 1: DSPM05 = 0) ...................................................................... 326
15.10.2 Dot type (display mode 1: DSPM05 = 0) ............................................................................... 329
15.10.3 Display type in which a segment spans two or more grids
(display mode 2: DSPM05 = 1) .............................................................................................. 332
15.8
15.9
CHAPTER 16 INTERRUPT AND TEST FUNCTIONS .......................................................................... 335
16.1
Interrupt Function Types ................................................................................................... 335
16.2
Interrupt Sources and Configuration............................................................................... 336
16.3
Interrupt Function Control Registers .............................................................................. 339
16.4
Interrupt Servicing Operations ......................................................................................... 347
16.4.1
Non-maskable interrupt request acknowledgment operation................................................ 347
16.4.2
Maskable interrupt request acknowledgment operation........................................................ 350
16.4.3
Software interrupt request acknowledgment operation......................................................... 352
16.4.4
Multiple interrupt servicing...................................................................................................... 353
16.4.5
Interrupt request hold.............................................................................................................. 356
16.5
Test Functions .................................................................................................................... 357
16.5.1
Test function control registers ................................................................................................ 357
16.5.2
Test input signal acknowledgment operation ........................................................................ 358
CHAPTER 17 STANDBY FUNCTION................................................................................................... 359
17.1
Standby Function and Configuration .............................................................................. 359
17.1.1
Standby function...................................................................................................................... 359
17.1.2
Standby function control register............................................................................................ 360
17.2
Standby Function Operations........................................................................................... 361
17.2.1
HALT mode ............................................................................................................................. 361
17.2.2
STOP mode ............................................................................................................................. 364
CHAPTER 18 RESET FUNCTION ........................................................................................................ 367
18.1
Reset Function .................................................................................................................... 367
CHAPTER 19
μ
PD78P0208 .................................................................................................................. 371
19.1
Internal Memory Size Switching Register ....................................................................... 372
19.2
Internal Expansion RAM Size Switching Register......................................................... 374
19.3
PROM Programming........................................................................................................... 375
19.3.1
Operating modes..................................................................................................................... 375
19.3.2
PROM write procedure ........................................................................................................... 377
19.3.3
PROM read procedure ............................................................................................................ 381
19.4 Screening of One-Time PROM Version ........................................................................... 382