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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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AN3213 датащи(PDF) 56 Page - STMicroelectronics |
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AN3213 датащи(HTML) 56 Page - STMicroelectronics |
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56 / 64 page  FAQs and troubleshooting AN3213 56/64 Doc ID 17429 Rev 1 9.2 Troubleshooting 1. Problem: the ST7570 demonstration board doesn't work at all. ● What to check: a) Check that the AC mains supply cable is well connected b) Check if the DL1 (VCC) and DL2 (VDDIO) are on c) Check the voltage on VCC, VDDIO, VCCA, VDD, and VDD_PLL lines. All these voltages must be present in order to turn on the ST7570. 2. Problem: the ST7570 demonstration board is not responding. ● What to check: a) Check if some activity on DL3 and DL4 is present when trying to communicate via USB with the board b) Try disconnecting and reconnecting the USB cable; sometimes the USB driver fails during COM port opening c) Verify if an 8 MHz clock is present on the XOUT pin (13) of the ST7570 device. 3. Problem: the ST7570 demonstration board does not transmit. ● What to check: a) Check the bias voltage on the PA_OUT test point (TP1) with the oscilloscope probe referred to VSS power ground. A DC voltage of VCC/2 must be measured during RX state b) Set the ST7570 in continuous transmission by setting TEST0 (higher frequency tone), TEST1 (lower frequency tone) or TEST2 (alternating tones) modes via the ST7570 GUI. A sinusoidal carrier should be detected by the oscilloscope probe, |
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