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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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MCP433X датащи(PDF) 55 Page - Microchip Technology |
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MCP433X датащи(HTML) 55 Page - Microchip Technology |
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55 / 88 page  2010 Microchip Technology Inc. DS22242A-page 55 MCP433X/435X 7.5 Write Data Normal and High Voltage The Write command is a 16-bit command. The format of the command is shown in Figure 7-2. A Write command to a volatile memory location changes that location after a properly formatted Write command (16-clock) have been received. 7.5.1 SINGLE WRITE TO VOLATILE MEMORY The write operation requires that the CS pin be in the active state (VILor VIHH). Typically, the CS pin will be in the inactive state (VIH) and is driven to the active state (VIL). The 16-bit Write command (command byte and data byte) is then clocked in on the SCK and SDI pins. Once all 16 bits have been received, the specified volatile address is updated. A write will not occur if the write command isn’t exactly 16 clocks pulses. This protects against system issues from corrupting the nonvolatile memory locations. Figure 6-2 and Figure 6-3 show possible waveforms for a single write. FIGURE 7-2: Write Command – SDI and SDO States. A D 3 A D 2 A D 1 A D 0 00 D 9 D 8 D 7 D 6 D 5 D 4 D 3 D 2 D 1 D 0 1111111111111111 Valid Address/Command combination 111111 0 0 0 0 0 0 0 0 0 0 Invalid Address/Command combination (1) COMMAND BYTE DATA BYTE SDI SDO Note 1: If an Error Condition occurs (CMDERR = L), all following SDO bits will be low until the CMDERR condition is cleared (the CS pin is forced to the inactive state). |
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