15
μ
PD17068
19. STANDBY .................................................................................................................................... 278
19.1
STANDBY FUNCTIONS..................................................................................................................
19.2
HALT FUNCTION ............................................................................................................................
19.2.1
General ............................................................................................................................
19.2.2
Halt State ........................................................................................................................
19.2.3
Halt Release Conditions ................................................................................................
19.2.4
Halt Release by Key Input.............................................................................................
19.2.5
Halt Release by Basic Timer 0......................................................................................
19.2.6
Halt Release by Interrupt ..............................................................................................
19.2.7
When Multiple Release Conditions Set Simultaneously..........................................
19.3
CLOCK-STOP FUNCTION ..............................................................................................................
19.3.1
Clock-Stop State ............................................................................................................
19.3.2
Clock-Stop State Release..............................................................................................
19.3.3
Clock-Stop Release by CE Reset ..................................................................................
19.3.4
Clock-Stop Release by Power-On Reset .....................................................................
19.3.5
Clock-Stop Release by R1B
2
/RLS
STP
Pin .....................................................................
19.3.6
Cautions When Using Clock-Stop Instruction ...........................................................
19.4
DEVICE OPERATION AT HALT AND CLOCK-STOP....................................................................
19.5
PIN PROCESSING CAUTIONS IN HALT STATE AND CLOCK-STOP STATE...........................
19.6
DEVICE OPERATION CONTROL BY CE PIN ................................................................................
19.6.1
Image Display Controller (IDC) Operation Control....................................................
19.6.2
PLL Frequency Synthesizer Operation Control .........................................................
19.6.3
Clock-Stop Instruction Disable/Enable Control.........................................................
19.6.4
Device Reset ...................................................................................................................
19.6.5
Signal Input to CE Pin ...................................................................................................
19.6.6
Organization and Functions of CE Pin Level Judge Register ..................................
19.6.7
Organization and Functions of CE Pin Edge Detection Register ............................
278
280
280
280
280
281
283
283
286
287
287
287
287
288
289
291
292
293
296
296
296
296
296
297
297
298
20. Reset ............................................................................................................................................ 299
20.1
RESET BLOCK CONFIGURATION.................................................................................................
20.2
RESET FUNCTION ..........................................................................................................................
20.3
CE RESET.........................................................................................................................................
20.3.1
CE Reset When Clock-Stop (STOP s Instruction) Not Used ....................................
20.3.2
CE Reset When Clock-Stop (STOP s Instruction) Used............................................
20.3.3
Cautions at CE Reset .....................................................................................................
20.4
POWER-ON RESET .........................................................................................................................
20.4.1
Power-On Reset at Normal Operation ........................................................................
20.4.2
Power-On Reset in Clock-Stop State ..........................................................................
20.4.3
Power-On Reset When V
DD
Rises From 0 V ...............................................................
20.5
RELATIONSHIP BETWEEN CE RESET AND POWER-ON RESET ..............................................
20.5.1
When V
DD
Pin and CE Pin Rise Simultaneously.........................................................
20.5.2
When CE Pin Raised in Forced Halt State Caused by Power-On Reset.................
20.5.3
When CE Pin Raised After Power-On Reset...............................................................
20.5.4
Cautions When V
DD
Raised ...........................................................................................
20.6
POWER FAILURE DETECTION ......................................................................................................
20.6.1
Power Failure Detection Circuit ...................................................................................
20.6.2
Cautions at Power Failure Detection with BTM0CY Flag ........................................
20.6.3
Power Failure Detection by RAM Judgment .............................................................
20.6.4
Cautions at Power Failure Detection by RAM Judgment ........................................
299
300
301
301
302
303
304
305
305
305
307
307
307
307
309
311
311
314
316
318