M16C65 Datasheet, PDF (90/829 Pages) Renesas Technology Corp – RENESAS MCU M16C FAMILY / M16C/60

Under development
M16C/65 Group
Preliminary Specification
This is a preliminary specification and is subject to change.
5. Protection
5. Protection
5.1 Introduction
In the event that a program runs out of control, this function protects the important registers listed below
so that they will not be rewritten easily.
5.2 Register
Table 5.1
Address
000Ah
Register Structure
Register Name
Protect Register
Register Symbol
After Reset
PRCR
00h
5.2.1 Protect Register (PRCR)
Protect Register
b7 b6 b5 b4 b3 b2 b1 b0
0 00
Symbol
PRCR
Address
000Ah
After Reset
00h
Bit Symbol
Bit Name
PRC0 Protect bit 0
PRC1 Protect bit 1
PRC2 Protect bit 2
PRC3 Protect bit 3
—
(b5-b4)
Reserved bits
PRC6 Protect bit 6
—
(b7)
Reserved bit
Function
RW
Enable write to registers CM0, CM1,
CM2, PLC0, PCLKR, and FRA0
0 : Write protected
RW
1 : Write enabled
Enable write to registers PM0, PM1, PM2,
TB2SC, INVC0, and INVC1
0 : Write protected
RW
1 : Write enabled
Enable write to registers PD9, S3C, and S4C
0 : Write protected
RW
1 : Write enabled
Enable write to registers VCR2, VWCE,
VD1LS, VW0C, VW1C, and VW2C
0 : Write protected
RW
1 : Write enabled
Set to 0
RW
Enable write to the PRG2C register
0 : Write protected
RW
1 : Write enabled
Set to 0
RW
REJ09B0484-0030 Rev.0.30 Sep 09, 2008
Page 55 of 791