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L99LD02 датащи(PDF) 37 Page - STMicroelectronics |
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L99LD02 датащи(HTML) 37 Page - STMicroelectronics |
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37 / 66 page ![]() DS12448 Rev 3 37/66 L99LD02 Serial peripheral interface (ST SPI standard) 64 Table 22. CR#1: Control Register 1 Bit Default Name Description 23 0 CTM_CLK_EN CTM_CLK_EN can be set to 1 only if UNLOCK = 1; trying to set this bit to 1 when UNLOCK = 0 will have no effects and it will maintain its previous value. CTM_CLK_EN can be reset to 0 also when UNLOCK = 0. To set CTM_CLK_EN to 1, it is necessary to send two consecutive SPI frames, as follows: 1st SPI write operation to set UNLOCK bit to 1 (CR#1, bit1) 2nd SPI write operation to set CTM_CLK_EN bit to 1 22÷2 Unused 10 UNLOCK [0]: bits GOSTBY, EN and BST_DIS cannot be set to 1 but can be reset; [1]: bits GOSTBY, EN and BST_DIS can be set to 1, but only with the next valid SPI frame. When UNLOCK = 1, it will be automatically reset with the next valid SPI frame. 0 Parity Bit Odd Parity Bit Check |
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