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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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RM0312 데이터시트(PDF) 28 Page - STMicroelectronics |
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RM0312 데이터시트(HTML) 28 Page - STMicroelectronics |
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28 / 275 page  Flash program memory and data EEPROM RM0312 28/275 DocID022352 Rev 3 Figure 5. UBC area size definition for touch sensing STM8TL5xxx devices 1. UBC[7:0]= 0x00 means no memory space is allocated for the UBC area. 2. Page 255 is reserved for the main program area or data EEPROM. 4.4.3 Data EEPROM (DATA) The data EEPROM area can be used to store application data. By default, the DATA area is write protected to prevent unintentional modification when the main program is updated in IAP mode. The write protection can be unlocked only by using a specific MASS key sequence (refer to Enabling write access to the DATA area). The size of the DATA area can be configured through the DATA option byte (DATASIZE) in ICP mode. This option byte specifies the number of pages (64 bytes) starting down from address 0x00 BFFF. The maximum size of the DATA area is of 2 Kbytes, corresponding to start address 0x00 B800 (see Figure 4) i.e. up to 32 pages of 64 bytes can be defined as data EEPROM. 4.4.4 Main program area The main program is the area which starts at the end of the UBC or PCODE and ends at address 0x00 BFFF. It is used to store the application code (see Figure 4). 4.4.5 Option bytes The option bytes are used to configure device hardware features and memory protection. They are located in a dedicated memory array of one block. The option bytes can be modified only in ICP/SWIM mode with OPT bit of the FLASH_CR2 register set to 1 (see Section 4.8.2: Flash control register 2 (FLASH_CR2)). 0x00 BFFF 0x00 BFBF 0x00 BF7F 0x 00 BF3F 0x 00 BEBF 0x00 80FF 0x 00 80BF 0x 00 807F Page 254 Page 253 Page 252 Page 251 Page 3 Page 2 Page 1 Page 0 0x00 8000 Interrupt vector table 64 bytes 64 bytes 64 bytes 64 bytes 64 bytes 64bytes Interrupt vector table 3 pages to 255 pages 255 pages User boot code area(2) UBC[7:0] =0x03 192 bytes 64 bytes Page 255 0x00 803F 0x00 BEFF UBC[7:0] ≤ 0xFF |
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