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AT83SND2CMP3B датащи(PDF) 23 Page - ATMEL Corporation |
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AT83SND2CMP3B датащи(HTML) 23 Page - ATMEL Corporation |
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23 / 241 page ![]() 23 4341F–MP3–03/06 AT8xC51SND2C/MP3B Reset Value = XXUU UXXX, UUUU UUUU after an hardware full chip erase. Note: 1. X2B initializes the X2 bit in CKCON during the reset phase. 2. In order to ensure boot loader activation at first power-up, AT89C51SND2C products are deliv- ered with BLJB programmed. 3. Bits 0 to 3 (LSN) can only be programmed by hardware mode. Reset Value = XXXX XXXX, UUUU UUUU after an hardware full chip erase. Reset Value = XXXX XXXX, UUUU UUUU after an hardware full chip erase. Table 6-4. SBV Byte – Software Boot Vector 76 543 210 ADD15 ADD14 ADD13 ADD12 ADD11 ADD10 ADD9 ADD8 Bit Number Bit Mnemonic Description 7 - 0 ADD15:8 MSB of the user’s boot loader 16-bit address location Refer to the boot loader datasheet for usage information (boot loader dependent) Table 6-5. SSB Byte – Software Security Byte 76 543 210 SSB7 SSB6 SSB5 SSB4 SSB3 SSB2 SSB1 SSB0 Bit Number Bit Mnemonic Description 7 - 0 SSB7:0 Software Security Byte Data Refer to the boot loader datasheet for usage information (boot loader dependent) |
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