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参数资料
| 型号： | M37221MAH-XXXSP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 8-BIT, MROM, 8.1 MHz, MICROCONTROLLER, PDIP42 |
| 封装： | 0.600 INCH, 1.78 MM PITCH, PLASTIC, SDIP-42 |
| 文件页数： | 62/112页 |
| 文件大小： | 1207K |
| 代理商： | M37221MAH-XXXSP |
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53
Rev. 1.0
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER
with ON-SCREEN DISPLAY CONTROLLER
M37221M4H/M6H/M8H/MAH–XXXSP/FP
M37221EASP/FP
MITSUBISHI MICROCOMPUTERS
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 the ROM. Up to 2 addresses can be
corrected ; a program for correction is stored in the ROM correction
memory in the RAM as the top address. There are 2 vectors for ROM
correction :
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 top address of the ROM correction vector,
the main program branches to the correction program stored in the
ROM memory. 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 regis-
ter.
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 both vectors 1 and
2.
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 (RCR0)
Nameunctions
0: Disabled
1: Enabled
1
Vector 2 enable bit (RCR1)
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
F
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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相关代理商/技术参数 |
参数描述 |
|---|---|
| M37224M3 | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
| M37224M3-050SP | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
| M37224M3-XXXSP | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
| M37225ECSP | 制造商:MITSUBISHI 制造商全称:Mitsubishi Electric Semiconductor 功能描述:SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
| M37225M6 | 制造商:RENESAS 制造商全称:Renesas Technology Corp 功能描述:SNGLE-CHIP 8-BIT CMOS MICROCOMPUTER for VOLTAGE SYNTHESIZER with ON-SCREEN DISPLAY CONTROLLER |
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