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MIC3003GML 数据表(PDF) 52 Page - Micrel Semiconductor |
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MIC3003GML 数据表(HTML) 52 Page - Micrel Semiconductor |
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52 / 75 page  Micrel, Inc. MIC3003 November 2009 52 M9999-111209-C hbwhelp@micrel.com or (408) 955-1690 Extended Control and Status (ECNTRL) D[7] reserved D[6] reserved D[5] reserved D[4] reserved D[3] SRS1 read/write D[2] reserved D[1] PLOS read/write D[0] PLS read/write Default Value 0000 0000b = 00h Serial Address A2h Byte Address 118 = 76h Bit(s) Function Operation D[7-4] Reserved Reserved—always read as zeros D[3] SRS1 Soft rate select (RS1) Assert the TRSOUT pin in Rate Select/Extended Rate Select Emulation Mode D[2] Reserved Reserved—always reads as zero D[1] PLOS Power Level Operation State D[0] PLS Power Level Select These two bits are read/write but change no functionality of the MIC3003 OEM Password Entry (OEMPW) D[7] read/write D[6] read/write D[5] read/write D[4] read/write D[3] read/write D[2] read/write D[1] read/write D[0] read/write Default value for all four bytes 0000 0000b = 00h (reset to zero at power-on) Serial address A2h Byte addresses If OEMCFG5-2 = 0: 120 – 123 = 78h – 7Bh If OEMCFG5-2 = 1: 123 – 126 = 7Bh – 7Eh This four-byte field is for entry of the password required to access the OEM area of the MIC3003’s memory and registers. A valid OEM password will also permit access to the user areas of memory. This field is compared to the four-byte OEMPWSET field at serial address A6h, bytes 12 - 15 (0Ch – 0Fh). If the two fields match, access is allowed to the OEM areas of the MIC3003 non-volatile memory at serial addresses A4h and A6h. The OEM password is set by writing the new value into OEMPWSET. The password comparison is performed following the write to the highest address byte of OEMPW, address 7Bh if OEMCFG5 bit 2 is low, or 7Eh if OEMCFG5 bit 2 is high. This byte must be written last. A four-byte burst-write sequence to OEMPW may be used as this will result in the highest address byte being written last. OEMPW is reset to zero at power on. Any values written to OEMPW will be readable by the host regardless of the locked/unlocked status of the device. If OEMPWSET is set to zero (00000000h), the MIC3003 will remain unlocked regardless of the contents of the OEMPW field. This is the factory default security setting. Byte Weight 3 OEM Password Entry, Most Significant Byte (Address = 7Bh resp. 7Eh) 2 OEM Password Entry, 2nd Most Significant Byte (Address = 7Ah resp. 7Dh) 1 OEM Password Entry, 2nd Least Significant Byte (Address = 79h resp. 7Ch) 0 OEM Password Entry, Least Significant Byte (Address = 78h resp. 7Bh) |
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