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công cụ tìm kiếm bảng dữ liệu linh kiện điện tử |
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SMS01GAF bảng dữ liệu(PDF) 31 Page - Numonyx B.V |
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SMS01GAF bảng dữ liệu(HTML) 31 Page - Numonyx B.V |
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31 / 61 page  SMSxxxAF, SMSxxxFF, SMSxxxBF Card registers 31/61 5 Card registers Six registers are defined in the card interface: OCR, CID, CSD, RCA, DSR and SCR. See Table 19 for a description. The registers are accessed by using the corresponding commands. The OCR, CID, CSD and SCR registers contain the card/content specific information, whereas the RCA and DSR registers are configuration registers that store the actual configuration parameters. For more details about the register structure, please refer to the SD Memory Card Specification v.1.01. Table 19. SD Memory Card Registers 5.1 OCR Register The 32-bit Operation Conditions Register contains the VDD voltage profile of the card. It also includes a status information bit that goes High (set to ‘1’) once the card power-up sequence has completed. The OCR register is used by the cards that do not support the full operating voltage range of the SD Memory Card bus, or by cards whose power-up sequence does not match the definition given in Figure 14: Power-Up Diagram. Name Width Description CID 128 Card IDentification number register. It contains the card’s individual identification number. It is mandatory. RCA(1) 1. The RCA Register is not used (available) in SPI mode. 16 Relative Card Address register. It contains the local system address of the card, that is dynamically suggested by the card and approved by the host during initialization. It is mandatory. DSR 16 Driver Stage Register. It is used to configure the card's output drivers. It is optional. CSD 128 Card Specific Data register. It contains the information about the card’s operation conditions. It is mandatory. SCR 64 SD Configuration Register. It contains the information about the SD Memory Card's Special Feature capabilities. It is mandatory OCR 32 Operation Condition Register. It is mandatory. Table 20. OCR Register Definition OCR Bit Position VDD Voltage Range 0-3 reserved 4 1.6V to 1.7V 5 1.7V to 1.8V 6 1.8V to 1.9V 7 1.9V to 2.0V 8 2.0V to 2.1V |
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