Panasonic MN101C77C, F77G user manual RC0VL, RC0VH, RC0VL = xB4 RC0VH =, 06BB FF

Chapter 2 CPU Basics

„ROM Correction Setup Example

The setup procedure with ROM correction to correct 2 parts of the program is shown below.

For the step to execute the ROM correction, refer to figure 2-7-12. Initial Routine for ROM correction on the previous page.

(STEP 1) Develop the correct program of the external EEPROM to RAM area.

Internal RAM

Address Data

06B4 0A

06B5 00

06B6 85

06B7 93

06B8 C2

06B9 91

06BA F0

06BB FF

06BC 0A

06BD 14

06BE 85

06BF 93

06C0 02

06C1 90

06C2 00

			External EEPROM
	Address	Data
	0000	03	Program management version.
	0001	19
	0002	09	Set value to the ROM correction address 0 setting register
	0003	01	(RC0AP)
	0004	B4	The head address of the development first correct program
	0005	06
	0006
		FD
	0007	08	Set value to the ROM correction address 1 setting register
	0008	01	(RC1AP)
	0009	BC	The head address of the development second correct program
	000A	06
	000B	0A
	000C	00
	000D	85
	000E	93	The first correct program instruction code
	000F	C2
develop	0010	91
	0011	F0
	0012	FF	For half-byte instruction adjustment
	0013	0A	(no need to the real ROM)
	0014	14
	0015	85	The second correct program instruction code
	0016	93
	0017	02
	0018	90
	0019
		00

(STEP 2) Set the ROM correction address setting register and the RC vector table.

[Setup for the first correction]

Set the head address of the program to be corrected at first to the ROM correction address 0 setting register (RC0AP).

RC0APL = x'19' RC0APM = x'09' RC0APH = x'01'

Set the internal RAM address x'06B4' that stored the first correct program to the RC vector table address

The first program to be corrected (internal ROM)

	The head address of the correction
Address		Data	(the set value of RC0AP)
10916		D900A0	cbne	0, d1, 1091E
10919		A005	mov	50, d0
1091B	58		mov	d0, (a0)
1091C	8940		bra	10920
1091E		B4	sub	d0, d0

The address for recover

The first correct program (internal RAM)

The head address of the correction program

(RC0V(L), RC0V(H).

Address Data

(the set value of RC0V)

RC0V(L) = x'B4' RC0V(H) = x'06'

006B4	A000	mov	0, d0
006B6	58	mov	d0, (a0)
006B7	392C190	bra	1091C

The addres for recover

II- 36 ROM Correction