Panasonic MN101C77C User Manual

Chapter 2   CPU Basics

II - 32

ROM Correction

ROM correction control register (RCCTR) and ROM correction address setting register (RCnAPL,

RCnAPM, RCnAPH) control the ROM correction.

7

6

5

4

3

2

1

0

RCCTR

( At reset : 

- 

 

-

  

- 

 

- 

 

- 

0 0 0 )

RC1EN

0

1

RC2EN

0

1

-

-

RC2EN

-

-

-

RC1EN RC0EN

RC0EN

ROM correction control at 1st address 

0

1

Enable

Disable

ROM correction control at 2nd address 

Enable

Disable

ROM correction control at 3rd address 

Enable

Disable

ROM correction control register (RCCTR) enables/disables the ROM correction function to 3 parts of the

program to be corrected. When the RCnEN flag is set, the ROM correction is activated. And when the

ROM address (the instruction execution address) reaches the set address to the ROM correction ad-

dress setting register, it branches indirectly to the RAM address set on the RC vector table (RCnV(L),

RCnV(H)). Set the RCnEN flag after setting the ROM correction address setting register.

„

ROM Correction Control Register(RCCTR)