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900844 датащи(PDF) 40 Page - Freescale Semiconductor, Inc |
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900844 датащи(HTML) 40 Page - Freescale Semiconductor, Inc |
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40 / 118 page ![]() Analog Integrated Circuit Device Data 40 Freescale Semiconductor 900844 FUNCTIONAL DEVICE OPERATION SYSTEM CONTROL INTERFACE Figure 16. Relationship Between the VID/VIDEN Pins, the DPV1VRD Bit, and VRCOMP Signal SPECIAL REGISTERS Vendor ID and Version ID The Vendor ID and other version details can be read via the Identification bits. These are hard-wired on the chip. Embedded Memory There are 24 memory registers of general purpose embedded memory, which are accessible by the processor to store critical data during power down. These registers consist of 8 in the general purpose registers area, and 16 more in the Freescale dedicated register area. General memory registers are called MEMx [MEM1, MEM2… MEM8]. The Freescale dedicated registers are called FSLMEMx [FSLMEM1, FSLMEM2… FSLMEM16]. The data written to these registers is maintained by the coin cell, when the main battery is deeply discharged or removed, and is part of the RTC block. The content of the embedded memory is reset by RTCPORB. The banks can be used for any system need, for bit retention with coin cell backup. Table 12. Vendor ID Registers Structure and Bits Description Name Bits Description ID1 (ADDR 0x00 - R - Default Value: 0x28) VENDID1 2:0 Chip1 Vendor ID REV1 5:3 Chip1 Revision ID Reserved 7:6 Reserved ID2 (ADDR 0x01 - R - Default Value: 0x00) VENDID2 2:0 Chip2 Vendor ID REV2 5:3 Chip2 Revision ID Reserved 7:6 Reserved ID3 (ADDR 0x02 - R - Default Value: 0x00) Reserved 7:0 Reserved ID4 (ADDR 0x03 - R - Default Value: 0x00) Reserved 7:0 Reserved SCU SCU SCU SCU SCU |
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