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TDA7503 bảng dữ liệu(PDF) 12 Page - STMicroelectronics |
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TDA7503 bảng dữ liệu(HTML) 12 Page - STMicroelectronics |
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12 / 26 page ![]() Five Word Packet Data Word Frame Sync 1 Frame Sync 0 Data In SCK Receive NETWORK MODE Interrupts Frame Sync 1 Frame Sync 0 Data In SCK Receive Interrupts NORMAL MODE Figure 7. SSI Protocol. The timing diagrams for the SSI Interface are shown in Figure 7 for both Network and Normal modes. In Normal Mode the rising edge FSYNC starts the internal bit counter to allow data to be clocked in or out. When bit count is equal to the pro- grammed word length the counter is reset and the shift register is broadside loaded into the data register. Additional SCK pulses are ignored after the counter is reset. The next word is clocked in or out starting with the next rising edge of FSYNC. In Network Mode the rising edge FSYNC starts the internal bit counter to allow data to be clocked in or out. When bit count is equal to the pro- grammed word length the counter is reset and the shift register is broadside loaded into the data register. At this point the FSRSD bit is set indicat- ing that a frame sync was received with that word. After being reset the counter continues counting, clocking in the next word. Only when the next rising edge of FSYNC is detected is the packet considered complete. TDA7503 12/26 |
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