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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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11LC010-IP датащи(PDF) 15 Page - Microchip Technology |
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11LC010-IP датащи(HTML) 15 Page - Microchip Technology |
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15 / 44 page  2010 Microchip Technology Inc. Preliminary DS22067H-page 15 11AAXXX/11LCXXX 4.6 Write Status Register (WRSR) Instruction The WRSR instruction allows the user to select one of four levels of protection for the array by writing to the appropriate bits in the STATUS register. The array is divided up into four segments. The user has the ability to write-protect none, one, two, or all four of the seg- ments of the array. The partitioning is controlled as illustrated in Table 4-3. After transmitting the STATUS register data, the master must transmit a NoMAK during the Acknowledge sequence in order to initiate the internal write cycle. TABLE 4-3: ARRAY PROTECTION TABLE 4-4: PROTECTED ARRAY ADDRESS LOCATIONS FIGURE 4-7: WRITE STATUS REGISTER COMMAND SEQUENCE Note: The WRSR instruction must be termi- nated with a NoMAK following the data byte. If a NoMAK is not received at this point, the command will be considered invalid, and the device will go into Idle mode without responding with a SAK or executing the command. BP1 BP0 Address Ranges Write-Protected Address Ranges Unprotected 00 None All 01 Upper 1/4 Lower 3/4 10 Upper 1/2 Lower 1/2 11 All None Density Upper 1/4 Upper 1/2 All Sectors 1K 60h-7Fh 40h-7Fh 00h-7Fh 2K C0h-FFh 80h-FFh 00h-FFh 4K 180h-1FFh 100h-1FFh 000h-1FFh 8K 300h-3FFh 200h-3FFh 000h-3FFh 16K 600h-7FFh 400h-7FFh 000h-7FFh 11 0 1 0 1 00 Start Header SCIO Device Address 00(1) 0 0 1 0 10 Command 10 1 0 1 1 01 Standby Pulse SCIO 76 5 4 Status Register Data 32 1 0 Twc Note 1: For the 11XXXX1, this bit must be a ‘1’. |
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