Register Descriptions; Protect Register (Prcr) - Renesas RX100 Series User Manual

RX13T Group
12.1

Register Descriptions

12.1.1

Protect Register (PRCR)

Address(es): 0008 03FEh
b15 b14
0 0
Value after reset:
Bit Symbol Bit Name
b0 PRC0 Protect Bit 0
b1 PRC1 Protect Bit 1
b2 — Reserved
b3 PRC3 Protect Bit 3
b7 to b4 — Reserved
b15 to b8 PRKEY[7:0] PRC Key Code
Note 1. Write data is not retained.
PRCi Bits (Protect Bit i) (i = 0, 1, 3)
These bits enable or disable writing to the corresponding registers to be protected.
Setting the PRCi bits to 1 and 0 enable and disable writing to the corresponding registers to be protected, respectively.
R01UH0822EJ0100 Rev.1.00
Jul 31, 2019
b13 b12 b11 b10
PRKEY[7:0]
0 0 0 0
Description
Enables writing to the registers related to the clock generation circuit.
0: Write disabled
1: Write enabled
Enables writing to the registers related to operating modes, low power
consumption functions, the clock generation circuit, and software reset.
0: Write disabled
1: Write enabled
This bit is read as 0. The write value should be 0.
Enables writing to the registers related to the LVD.
0: Write disabled
1: Write enabled
These bits are read as 0. The write value should be 0.
These bits control permission and prohibition of writing to the PRCR
register.
To modify the PRCR register, write A5h to the 8 higher-order bits and the
desired value to the 8 lower-order bits as a 16-bit unit.
12. Register Write Protection Function
b9 b8 b7 b6
— —
0 0 0 0
b5 b4 b3 b2
— — PRC3 — PRC1
0 0 0 0
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b1 b0
PRC0
0 0
R/W
R/W
R/W
R/W
R/W
R/W
1
R/W*