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| 型号： | M38D59GF-XXXFP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 6.25 MHz, MICROCONTROLLER, PQFP80 |
| 封装： | 14 X 20 MM, 0.80 MM PITCH, PLASTIC, QFP-80 |
| 文件页数： | 97/142页 |
| 文件大小： | 2004K |
| 代理商： | M38D59GF-XXXFP |
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Rev.3.04
May 20, 2008
REJ03B0158-0304
38D5 Group
ROM CORRECTION FUNCTION
A part of program in ROM can be corrected.
Set the start address of the corrected ROM data (i.e. an Op code
address of the beginning instruction) to the ROM correction
address high-order and low-order registers.
When the program is being executed and the value of the
program counter matches with the set address value in the ROM
correction address registers, the program is branched to the ROM
correction vectors and then the correction program can be
executed by setting it to the ROM correction vectors.
Use the JMP instruction (3-byte instruction) to return the main
program from the correction program.
The correctable area is up to two. There are two vectors for ROM
correction.
Also, ROM correction vector can be selected from the RAM area
or ROM area by the ROM correction memory selection bit.
The ROM correction function is controlled by the ROM
correction address 1 enable bit and ROM correction address 2
enable bit.
If the ROM correction function is not used, the ROM correction
vector may be used as normal RAM/ROM. When using the
ROM correction vector as normal RAM/ROM, make sure to set
bits 1 and 0 in the ROM correction enable register to “0”
(Disable).
<Notes>
1. When using the ROM correction function, set the ROM cor-
rection address registers and then enable the ROM correc-
tion with the ROM correction enable register.
2. Do not set addresses other than the ROM area in the ROM
correction address registers.
Do not set the same ROM correction addresses in both the
ROM correction address registers 1 and ROM correction
address registers 2.
3. It is necessary to contain the process for ROM correction in
the program.
Fig. 49 ROM correction address register
Fig. 50 Memory map of M38D58G8
Fig. 51 Structure of ROM correction enable register
RAM area
RC2 = “0”
ROM area
RC2 = “1”
Vector 1
address 010016
address F10016
Vector 2
address 012016
address F12016
0FF816
ROM correction address 1 high-order register (RCA1H)
ROM correction address 1 low-order register (RCA1L)
ROM correction address 2 high-order register (RCA2H)
ROM correction address 2 low-order register (RCA2L)
0FF916
0FFA16
0FFB16
Note: Do not set address other than ROM area.
808016
SFR area
Interrupt vector area
Reserved ROM area
010016
000016
004016
012016
FF0016
FFFF16
Zero
page
Special
page
063F16
EFFF16
RAM
ROM
Protect
area 1
F12016
FFDB16
Reserved ROM area
800016
F10016
ROM correction vector 1
ROM correction vector 2
ROM correction vector 1
ROM correction vector 2
~
ROM correction address 1 enable bit (RC0)
0 : Disable
1 : Enable
ROM correction address 2 enable bit (RC1)
0 : Disable
1 : Enable
ROM correction memory selection bit (RC2)
0 : Branch to the RAM area
1 : Branch to the ROM area
Not used (returns “0” when read)
ROM correction enable register (Address 0FFC16)
RCR
b7
b0
Note: After ROM correction address register is set,
set the ROM correction address enable bit to be enabled.
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