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CC1021-RTR1 数据表(PDF) 24 Page - Texas Instruments |
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CC1021-RTR1 数据表(HTML) 24 Page - Texas Instruments |
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24 / 92 page ![]() CC1021 SWRS045 Page 24 of 91 PCLK PDI PSEL Address Read mode 6 5 4 3 2 1 0 T SS T CL,min T CH,min T HS R PDO 7 6 5 4 3 2 1 0 Data byte T SH Figure 8. Configuration registers read operation Parameter Symbol Min Max Unit Conditions PCLK, clock frequency FPCLK 10 MHz PCLK low pulse duration TCL,min 50 ns The minimum time PCLK must be low. PCLK high pulse duration TCH,min 50 ns The minimum time PCLK must be high. PSEL setup time TSS 25 ns The minimum time PSEL must be low before positive edge of PCLK. PSEL hold time THS 25 ns The minimum time PSEL must be held low after the negative edge of PCLK. PSEL high time TSH 50 ns The minimum time PSEL must be high. PDI setup time TSD 25 ns The minimum time data on PDI must be ready before the positive edge of PCLK. PDI hold time THD 25 ns The minimum time data must be held at PDI, after the positive edge of PCLK. Rise time Trise 100 ns The maximum rise time for PCLK and PSEL Fall time Tfall 100 ns The maximum fall time for PCLK and PSEL Note: The setup and hold times refer to 50% of VDD. The rise and fall times refer to 10% / 90% of VDD. The maximum load that this table is valid for is 20 pF. Table 14. Serial interface, timing specification |
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