UPD784938 Datasheet, PDF (21/733 Pages) NEC – 16-Bit Single-Chip Microcontrollers

24.3
24.4
24.5
24.2.1 Wait function control registers ..................................................................................................... 615
24.2.2 Address waits ............................................................................................................................... 618
24.2.3 Access waits ................................................................................................................................. 621
Pseudo-Static RAM Refresh Function .................................................................................. 628
24.3.1 Control registers ........................................................................................................................... 629
24.3.2 Operations .................................................................................................................................... 630
Bus Hold Function ................................................................................................................... 634
24.4.1 Hold mode register (HLDM) ........................................................................................................ 634
24.4.2 Operation ...................................................................................................................................... 635
Cautions .................................................................................................................................... 636
CHAPTER 25 STANDBY FUNCTION .................................................................................................... 637
25.1 Configuration and Function ................................................................................................... 637
25.2 Control Registers ..................................................................................................................... 639
25.2.1 Standby control register (STBC) ................................................................................................. 639
25.2.2 Oscillation stabilization time specification register (OSTS) ....................................................... 641
25.3 HALT Mode ................................................................................................................................ 642
25.3.1 HALT mode setting and operating status .................................................................................... 642
25.3.2 HALT mode release ..................................................................................................................... 642
25.4 STOP Mode ............................................................................................................................... 646
25.4.1 STOP mode setting and operating status ................................................................................... 646
25.4.2 STOP mode release .................................................................................................................... 647
25.5 IDLE Mode ................................................................................................................................. 650
25.5.1 IDLE mode setting and operating status .................................................................................... 650
25.5.2 IDLE mode release ...................................................................................................................... 651
25.6 Check Items when STOP Mode/IDLE Mode is Used ........................................................... 653
25.7 Cautions .................................................................................................................................... 655
CHAPTER 26 RESET FUNCTION ......................................................................................................... 657
26.1 Reset Function ......................................................................................................................... 657
26.2 Caution ...................................................................................................................................... 662
CHAPTER 27 ROM CORRECTION ....................................................................................................... 663
27.1 ROM Correction Functions ..................................................................................................... 663
27.2 ROM Correction Configuration .............................................................................................. 665
27.3 Control Register for ROM Correction ................................................................................... 667
27.4 Use of ROM Correction ........................................................................................................... 669
27.5 Conditions for Executing ROM Correction .......................................................................... 670
CHAPTER 28 µPD78F4938 PROGRAMMING ...................................................................................... 671
28.1 Internal Memory Size Switching Register (IMS) .................................................................. 672
28.2 Flash Memory Programming Using Flashpro II and Flashpro III ...................................... 673
28.2.1 Selecting communication mode .................................................................................................. 673
28.2.2 Flash memory programming functions ........................................................................................ 674
28.2.3 Connecting Flashpro II or Flashpro III ........................................................................................ 675
CHAPTER 29 INSTRUCTION OPERATIONS ....................................................................................... 677
29.1 Conventions ............................................................................................................................. 677
Preliminary User’s Manual U13987EJ1V0UM00
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