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M30620FCAFP Datasheet(PDF) 319 Page - Renesas Technology Corp |
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M30620FCAFP Datasheet(HTML) 319 Page - Renesas Technology Corp |
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319 / 615 page  Mitsubishi microcomputers M16C / 62A Group SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER Protect 2-2 2.1.1 Overview of the protect usage 'Protect' is a function that causes a value held in a register to be unchanged even when a program runs away. The following is an overview of the protect usage: (1) Registers affected by the protect function The registers affected by the protect function are: (a) System clock control registers 0, 1 (addresses 000616 and 000716) (b) Processor mode registers 0, 1 (addresses 000416 and 000516) (c) Port P9 direction register (address 03F316), SI/Oi control register (i=3,4)(addresses 036216 and 036616) The values in registers (1) through (3) cannot be changed in write-protect state. To change values in the registers, put the individual registers in write-enabled state. (2) Protect register Figure 2.1.1 shows protect register. 2.1 Protect Usage |
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