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BCM20705 датащи(PDF) 62 Page - Cypress Semiconductor |
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BCM20705 датащи(HTML) 62 Page - Cypress Semiconductor |
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62 / 67 page ![]() Timing and AC Characteristics BCM20705 Data Sheet BROADCOM CONFIDENTIAL Broadcom® Bluetooth Transceiver and Baseband Processor November 13, 2014 • MCS20705-DS104-R Page 61 Figure 16: PCM Interface Timing (Long Frame Synchronization, Slave Mode) Table 25: PCM Interface Timing Specifications (Long Frame Synchronization, Slave Mode) Reference Characteristics Minimum Maximum Unit 1 PCM bit clock frequency. 128 2048 kHz 2 PCM bit clock HIGH time. 209 – ns 3 PCM bit clock LOW time. 209 – ns 4 Setup time for PCM_SYNC before falling edge of PCM_BCLK during first bit time. 50 – ns 5 Hold time for PCM_SYNC after falling edge of PCM_BCLK during second bit period. (PCM_SYNC may go low any time from second bit period to last bit period). 10 – ns 6 Delay from rising edge of PCM_BCLK or PCM_SYNC (whichever is later) to data valid for first bit on PCM_OUT. –50 ns 7 Hold time of PCM_OUT after PCM_BCLK falling edge. – 175 ns 8 Setup time for PCM_IN before PCM_BCLK falling edge. 50 – ns 9 Hold time for PCM_IN after PCM_BCLK falling edge. 10 – ns 10 Delay from falling edge of PCM_BCLK or PCM_SYNC (whichever is later) during last bit in slot to PCM_OUT becoming high impedance. –100 ns 1 2 3 45 7 8 9 PCM_BCLK PCM_SYNC PCM_OUT PCM_IN Bit 0 Bit 1 Bit 0 Bit 1 Bit 15 Bit 15 6 HIGH IMPEDENCE 10 |
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