
Preliminary User’s Manual U17260EJ3V1UD
15
23.2
Configuration of Power-on-Clear Circuit............................................................................. 531
23.3
Operation of Power-on-Clear Circuit ................................................................................... 531
23.4
Cautions for Power-on-Clear Circuit.................................................................................... 534
CHAPTER 24 LOW-VOLTAGE DETECTOR ....................................................................................... 536
24.1
Functions of Low-Voltage Detector ..................................................................................... 536
24.2
Configuration of Low-Voltage Detector............................................................................... 536
24.3
Registers Controlling Low-Voltage Detector ...................................................................... 537
24.4
Operation of Low-Voltage Detector ..................................................................................... 540
24.4.1
When used as reset .................................................................................................................541
24.4.2
When used as interrupt ............................................................................................................546
24.5
Cautions for Low-Voltage Detector...................................................................................... 551
CHAPTER 25 OPTION BYTE............................................................................................................... 554
25.1
Functions of Option Bytes .................................................................................................... 554
25.2
Format of Option Byte ........................................................................................................... 555
CHAPTER 26 FLASH MEMORY.......................................................................................................... 558
26.1
Internal Memory Size Switching Register ........................................................................... 558
26.2
Internal Expansion RAM Size Switching Register.............................................................. 560
26.3
Writing with Flash Programmer ........................................................................................... 561
26.4
Programming Environment................................................................................................... 564
26.5
Communication Mode ........................................................................................................... 564
26.6
Handling of Pins on Board.................................................................................................... 566
26.6.1
FLMD0 pin ...............................................................................................................................566
26.6.2
Serial interface pins..................................................................................................................566
26.6.3
RESET pin ...............................................................................................................................568
26.6.4
Port pins...................................................................................................................................568
26.6.5
REGC pin.................................................................................................................................568
26.6.6
Other signal pins ......................................................................................................................568
26.6.7
Power supply ...........................................................................................................................568
26.7
Programming Method............................................................................................................ 569
26.7.1
Controlling flash memory .........................................................................................................569
26.7.2
Flash memory programming mode ..........................................................................................569
26.7.3
Selecting communication mode ...............................................................................................570
26.7.4
Communication commands......................................................................................................571
26.8
Security Settings.................................................................................................................... 572
26.9
Flash Memory Programming by Self-Programming........................................................... 574
26.9.1
Boot swap function...................................................................................................................576
CHAPTER 27 ON-CHIP DEBUG FUNCTION (
PD78F0537D ONLY) ............................................ 578
27.1
On-Chip Debug Security ID................................................................................................... 579
CHAPTER 28 INSTRUCTION SET ...................................................................................................... 580
28.1
Conventions Used in Operation List.................................................................................... 580
28.1.1
Operand identifiers and specification methods ........................................................................580