
Preliminary User’s Manual U16895EJ1V0UD
16
22.3
Register to Check Reset Source............................................................................................. 637
22.4
Reset Sources .......................................................................................................................... 638
22.4.1
Reset operation via RESET pin ................................................................................................... 638
22.4.2
Reset operation by WDTRES1 signal .......................................................................................... 642
22.4.3
Reset operation by WDTRES2 signal .......................................................................................... 643
22.4.4
Power-on-clear reset operation.................................................................................................... 644
22.4.5
Reset operation by low-voltage detector...................................................................................... 647
22.4.6
Reset operation by clock monitor................................................................................................. 648
22.5
Reset Output Function............................................................................................................. 649
CHAPTER 23 CLOCK MONITOR ........................................................................................................ 650
23.1
Function .................................................................................................................................... 650
23.2
Registers ................................................................................................................................... 650
23.3
Operation .................................................................................................................................. 652
23.4
Ring Clock Operation Mode .................................................................................................... 655
23.4.1
Setting and operation status ........................................................................................................ 655
23.4.2
Releasing ring clock operation mode ........................................................................................... 655
23.5
Ring HALT Mode ...................................................................................................................... 657
23.5.1
Setting and operation status ........................................................................................................ 657
23.5.2
Releasing ring HALT mode.......................................................................................................... 657
CHAPTER 24 LOW-VOLTAGE DETECTOR ....................................................................................... 659
24.1
Function .................................................................................................................................... 659
24.2
Configuration............................................................................................................................ 659
24.3
Registers ................................................................................................................................... 660
24.4
Operation .................................................................................................................................. 662
CHAPTER 25 POWER-ON-CLEAR CIRCUIT...................................................................................... 664
25.1
Function .................................................................................................................................... 664
25.2
Configuration............................................................................................................................ 664
25.3
Operation .................................................................................................................................. 665
CHAPTER 26 REGULATOR ................................................................................................................. 666
26.1
Overview ................................................................................................................................... 666
26.2
Operation .................................................................................................................................. 666
CHAPTER 27 ROM CORRECTION FUNCTION................................................................................. 668
27.1
Overview ................................................................................................................................... 668
27.2
Control Registers ..................................................................................................................... 669
27.2.1
Correction address registers 0 to 3 (CORAD0 to CORAD3)........................................................ 669
27.2.2
Correction control register (CORCN) ........................................................................................... 670
27.3
ROM Correction Operation and Program Flow ..................................................................... 670
CHAPTER 28 MASK OPTION/OPTION BYTE ................................................................................... 672
28.1
Mask Option (Mask ROM Versions)........................................................................................ 672
28.2
Option Byte (Flash Memory Versions) ................................................................................... 673