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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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CS4970X4 датащи(PDF) 13 Page - Cirrus Logic |
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CS4970X4 датащи(HTML) 13 Page - Cirrus Logic |
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13 / 34 page  DS752PP8 Copyright 2009 Cirrus Logic 13 CS4970x4 Data Sheet 32-bit High Definition Audio Decoder DSP Family 5.9 Switching Characteristics — Internal Clock 5.10 Switching Characteristics — Serial Control Port - SPI Slave Mode . Parameter Symbol Min Max Unit Internal DCLK frequency1 CS497004-CQZ CS497004-CQZR CS497024-CVZ CS497024-CVZR CS497024-CVZ CS497024-CVZR 1.After initial power-on reset, Fdclk = Fxtal. After initial kickstart commands, the PLL is locked to max Fdclk and remains locked until the next power-on reset. Fdclk Fxtal 150 MHz Internal DCLK period1 CS497004-CQZ CS497004-CQZR CS497024-CVZ CS497024-CVZR CS497024-CVZ CS497024-CVZR DCLKP 6.7 1/Fxtal ns Parameter Symbol Min Typical Max Units SCP_CLK frequency1 1. The specification fspisck indicates the maximum speed of the hardware. The system designer should be aware that the actual maximum speed of the communication port may be limited by the firmware application. Flow control using the SCP_BSY# pin should be implemented to prevent overflow of the input data buffer.At boot the maximum speed is Fxtal/3. fspisck -25 MHz SCP_CS# falling to SCP_CLK rising tspicss 24 - ns SCP_CLK low time tspickl 20 - ns SCP_CLK high time tspickh 20 - ns Setup time SCP_MOSI input tspidsu 5- ns Hold time SCP_MOSI input tspidh 5- ns SCP_CLK low to SCP_MISO output valid tspidov -11 ns SCP_CLK falling to SCP_IRQ# rising tspiirqh -20 ns SCP_CS# rising to SCP_IRQ# falling tspiirql 0ns SCP_CLK low to SCP_CS# rising tspicsh 24 - ns SCP_CS# rising to SCP_MISO output high-Z tspicsdz -20 ns SCP_CLK rising to SCP_BSY# falling tspicbsyl -3*DCLKP+20 ns |
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