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MC33596 Datasheet(PDF) 24 Page - Freescale Semiconductor, Inc |
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MC33596 Datasheet(HTML) 24 Page - Freescale Semiconductor, Inc |
24 / 70 page MC33596 Data Sheet, Rev. 4 Receive Mode Freescale Semiconductor 24 11.4.2 Operation Two modes of operation are available: sample mode and continuous mode. 11.4.2.1 Sample Mode Sample mode allows the peak power of a specific pulse in an incoming frame to be measured. The quasi peak detector is reset by closing S1. After 7 × Tdigclk, S1 is released. S2 is closed when RSSIC is set high. On the falling edge of RSSIC, S2 is opened. The voltage on RSSIOUT is sampled and held. The last RSSI conversion results are stored in the RSSI register and no further conversion is done. The RSSI register is updated every 32 × Tdigclk. Therefore, the minimum duration of the high pulse on RSSIC is 32 × Tdigclk. Figure 16. RSSI Operation in Sample Mode 11.4.2.2 Continuous Mode Continuous mode is used to make a peak measurement on an incoming frame, without having to select a specific pulse to be measured. The quasi peak detector is reset by closing S1. After 7 × Tdigclk, S1 is opened. S2 is closed when RSSIC is set high. As long as RSSIC is kept high, S2 is closed, and RSSIOUT follows the peak value with a decay time constant of 5 ms. The ADC runs continuously, and continually updates the RSSI register. Thus, reading this register gives the most recent conversion value, prior to the register being read. The minimum duration of the high pulse on CONFB is 32 × Tdigclk. Closed 7 x tdigclk Updated Frozen Sampled and Hold RSSI Voltage Peak Detector Reset Sampling Open Open Frozen Open Closed Closed RSSIC S1 S2 RSSI Register RSSIOUT CONFB MOSI MISO CMD RSSI Value |
Similar Part No. - MC33596_09 |
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Similar Description - MC33596_09 |
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