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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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HT85F2270 датащи(PDF) 31 Page - Holtek Semiconductor Inc |
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HT85F2270 датащи(HTML) 31 Page - Holtek Semiconductor Inc |
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31 / 226 page  Rev. 1.00 �1 of ��6 �a� 1�� �01� Standard 8051 8-Bit Flash MCU HT85F2260/HT85F2270/HT85F2280 18 Flash Program Memory The Program Memory is the location where the user code or program is stored. For these devices the Program Memory is Flash type, which means it can be programmed and re-programmed a large number of times, allowing the user the convenience of code modification on the same device. By using the appropriate programming tools, these Flash devices offer users the flexibility to conveniently debug and develop their applications while also offering a means of field programming and updating. Structure The Program Memory has a capacity from 16K×8 to 64K×8. The Program Memory is addressed by the Program Counter and also contains data, table information and interrupt entries. Table data, which can be setup in any location within the Program Memory, is addressed by a separate table pointer register. Special Vectors Within the Program Memory, certain locations are reserved for the reset and interrupts. The location 000H is reserved for use by the device reset for program initialisation. After a device reset is initiated, the program will jump to this location and begin execution. �FFFH Reset 0000H HT85F2260 000�H 00ABH HT85F2270 HT85F2280 Interrupt Vector 8 bits 8 bits 8 bits Reset Interrupt Vector Reset Interrupt Vector 7FFFH FFFFH Program Memory Structure |
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