參數(shù)資料
型號(hào)： M37273MFH-XXXSP
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 8.1 MHz, MICROCONTROLLER, PDIP52
封裝： 0.600 INCH, 1.78 MM PITCH, PLASTIC, SDIP-52
文件頁數(shù)： 75/130頁
文件大小： 1661K
代理商： M37273MFH-XXXSP
48
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER with CLOSED CAPTION DECODER
and ON-SCREEN DISPLAY CONTROLLER
M37273MFH–XXXSP
MITSUBISHI MICROCOMPUTERS
Rev. 1.0
Fig. 8.9.2 ROM Correction Enable Register
Fig. 8.9.1 ROM Correction Address Registers
8.9 ROM CORRECTION FUNCTION
This can correct program data in ROM. Up to 2 addresses can be
corrected, a program for correction is stored in the ROM correction
vector in RAM as the top address. The ROM correction vectors are 2
vectors.
Vector 1 : address 030016
Vector 2 : address 032016
Set the address of the ROM data to be corrected into the ROM cor-
rection address register. When the value of the counter matches the
ROM data address in the ROM correction vector as the top address,
the main program branches to the correction program stored in the
ROM memory for correction. To return from the correction program
to the main program, the op code and operand of the JMP instruction
(total of 3 bytes) are necessary at the end of the correction program.
The ROM correction function is controlled by the ROM correction
enable register.
Notes 1: Specify the first address (op code address) of each
instruction as the ROM correction address.
2: Use the JMP instruction (total of 3 bytes) to return from
the correction program to the main program.
3: Do not set the same ROM correction address to vectors 1
and 2.
020A16
ROM correction address 1 (high-order)
020B16
ROM correction address 1 (low-order)
020C16
ROM correction address 2 (high-order)
020D16
ROM correction address 2 (low-order)
b7 b6 b5 b4 b3 b2 b1 b0
ROM correction enable register (RCR) [Address 020E 16]
B
After reset
RW
ROM Correction Enable Register
0
Vector 1 enable bit (RC0)
Name
Functions
0: Disabled
1: Enabled
1
Vector 2 enable bit (RC1)
0: Disabled
1: Enabled
2
to
7
Nothing is assigned. These bits are write disable bits. When
these bits are read out, the values are “0.”
0
RW
R —
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