Register Write Protection Function - Renesas RX100 Series User Manual

RX13T Group
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).
Table 12.1 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
 Registers related to the clock generation circuit:
PRC0
SCKCR, SCKCR3, PLLCR, PLLCR2, MOSCCR, LOCOCR, ILOCOCR, HOCOCR, OSTDCR, OSTDSR, LOCOTRR,
ILOCOTRR, HOCOTRR0
 Register related to the operating modes:
PRC1
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
 Registers related to the LVD:
PRC3
LVCMPCR, LVDLVLR, LVD1CR0, LVD1CR1, LVD1SR, LVD2CR0, LVD2CR1, LVD2SR
R01UH0822EJ0100 Rev.1.00
Jul 31, 2019
12. Register Write Protection Function
Page 187 of 1041