R01UH0822EJ0100 Rev.1.00
Page 187 of 1041
Jul 31, 2019
RX13T Group
12. Register Write Protection Function
12.
Register Write Protection Function
The register write protection function protects important registers from being overwritten for in case a program runs out
of control. The registers to be protected are set with the protect register (PRCR).
lists the association between the PRCR bits and the registers to be protected.
Table 12.1
Association between PRCR Bits and Registers to be Protected
PRCR Bit
Register to be Protected
PRC0
Registers related to the clock generation circuit:
SCKCR, SCKCR3, PLLCR, PLLCR2, MOSCCR, LOCOCR, ILOCOCR, HOCOCR, OSTDCR, OSTDSR, LOCOTRR,
ILOCOTRR, HOCOTRR0
PRC1
Register related to the operating modes:
SYSCR1
Registers related to low power consumption functions:
SBYCR, MSTPCRA, MSTPCRB, MSTPCRC, OPCCR
Registers related to the clock generation circuit:
MOFCR, MOSCWTCR
Software reset register:
SWRR
PRC3
Registers related to the LVD:
LVCMPCR, LVDLVLR, LVD1CR0, LVD1CR1, LVD1SR, LVD2CR0, LVD2CR1, LVD2SR