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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ES9218PC датащи(PDF) 60 Page - ESS Technology,Inc |
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ES9218PC датащи(HTML) 60 Page - ESS Technology,Inc |
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60 / 101 page  ES9218P Datasheet December 6, 2018 CONFIDENTIAL ADVANCE INFORMATION 1.8 ESS TECHNOLOGY, INC. 237 South Hillview Drive, Milpitas, CA 95035, USA Tel (408) 643-8800 • Fax (408) 643-8801 60 Register 26: Charge Pump Soft Start Delay (0x1A) Bits [7:0] Mnemonic cp_ss_delay Default 8’d98 Bit Mnemonic Description [7:0] cp_ss_delay Configures the delay between the weak charge pump enable and the strong charge pump enable. This delay is to limit the inrush currents of the strong charge pump when powering up. This relationship is not exact because chargepump clock frequency is not guaranteed to be exactly equal to XI(MCLK). It is automatically adjusted to undo the effects of clock gearing. The result is that the chargepump clock rate remains constant with respect to XI(MCLK) even when CLK changes but only to within the truncation error of the chargepump clock divider. delay(s) ≈ 256 ∗ cp_ss_delay fMCLK Example: For the default register setting if XI(MCLK) = 25MHz, delay ≈ 1ms. See System Clock XI(MCLK) for the relationship between XI(MCLK) and CLK. |
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