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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AT25QL641 датащи(PDF) 63 Page - Dialog Semiconductor |
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AT25QL641 датащи(HTML) 63 Page - Dialog Semiconductor |
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63 / 77 page  62 AT25QL641 DS-25QL641–130E–10/2018 7.38 Exit Secured OTP (C1h) The Exit Secured OTP instruction is for exiting the additional 4 Kbit secured OTP mode. (Please refer to Figure 7-60). Figure 7-60. Exit Secured OTP instruction for SPI Mode (left) and QPI Mode (right) 7.39 Read Security Register (2Bh) The Read Security Register can be read the value of Security Register bits at any time (even in program/erase/write status register-1 and write status register-2 condition) and continuously. Bits 0 and 1 of this register are described below. All other bits of the register are reserved. Secured OTP Indicator bit. The Secured OTP indicator bit shows the chip is locked by factory before or not. When it is “0”, it indicates a non-factory lock, a “1” indicates a factory lock. Lock-down Secured OTP (LDSO) bit. By executing the ‘Write Security Register’ instruction, the LDSO bit may be set to “1” for customer lock down purposes. However, once the bit it set to “1” (locked down), the LDSO bit and the 4 Kbit Secured OTP area cannot be updated any more. While it is in 4 Kbit Secured OTP mode, array access is not allowed to write. Table 7-12. Security Register Definition Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0 x x x x x x LDSO (indicate if lock- down) Secured OTP indicator bit Reserved Reserved Reserved Reserved Reserved Reserved 0 = not lock-down 1 = lock- down (cannot program/ erase OTP) 0 = non factory lock 1 = factory lock Volatil e bit Volatile bit Volatile bit Volatile bit Volatile bit Volatile bit Non- Volatile bit Non- Volatile bit |
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