參數(shù)資料
型號(hào)： M37221M4-XXXSP
元件分類(lèi)： 微控制器/微處理器
英文描述： 8-BIT, MROM, 8.1 MHz, MICROCONTROLLER, PDIP42
封裝： 0.600 INCH, 1.78 MM PITCH, PLASTIC, SDIP-42
文件頁(yè)數(shù)： 65/114頁(yè)
文件大?。?/td> 1653K
代理商： M37221M4-XXXSP
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53
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
with ON-SCREEN DISPLAY CONTROLLER
M37221M4/M8/MA–XXXSP, M37221M6–XXXSP/FP
M37221EASP/FP
MITSUBISHI MICROCOMPUTERS
Rev. 1.0
Fig. 8.10.2 ROM Correction Enable Register
Fig. 8.10.1 ROM Correction Address Registers
8.10 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
memory in RAM as the top address. The ROM correction vectors are
2 vectors.
Vector 1 : address 02C016
Vector 2 : address 02E016
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.
4: Only M37221M8/MA-XXXSP and M37221EASP/FP have ROM cor-
rection function.
b7 b6 b5 b4 b3 b2 b1 b0
ROM correction enable register (RCR) [Address 021B16]
B
After reset
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
4
to
7
Nothing is assigned. These bits are write disable bits. When
these bits are read out, the values are “0.”
0
2, 3 Fix these bits to “0.”
0
RW
R —
RW
021716
ROM correction address 1 (high-order)
021816
ROM correction address 1 (low-order)
021916
ROM correction address 2 (high-order)
021A16
ROM correction address 2 (low-order)
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
M37221M6 制造商:RENESAS 制造商全稱(chēng):Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER
M37221M6_03 制造商:RENESAS 制造商全稱(chēng):Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER
M37221M6-054SP 制造商:MITSUBISHI 制造商全稱(chēng):Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
M37221M6-079SP 制造商:MITSUBISHI 制造商全稱(chēng):Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
M37221M6-286SP 制造商:MITSUBISHI 制造商全稱(chēng):Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
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