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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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LPC82X датащи(PDF) 71 Page - NXP Semiconductors |
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LPC82X датащи(HTML) 71 Page - NXP Semiconductors |
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71 / 83 page  LPC82x All information provided in this document is subject to legal disclaimers. © NXP Semiconductors N.V. 2021. All rights reserved. Product data sheet Rev. 1.4 — 19 March 2021 71 of 82 NXP Semiconductors LPC82x 32-bit ARM Cortex-M0+ microcontroller 14.4 Termination of unused pins Table 30 shows how to terminate pins that are not used in the application. In many cases, unused pins may should be connected externally or configured correctly by software to minimize the overall power consumption of the part. (1) See Section 14.1 “XTAL input” for the values of C1 and C2. (2) Position the decoupling capacitors of 0.1 μF and 0.01 μF as close as possible to the VDD pin. Add one set of decoupling capacitors to each VDD pin. (3) Position the decoupling capacitors of 0.1 μF as close as possible to the VREFN and VDD pins. The 10 μF bypass capacitor filters the power line. Tie VREFP to VDD if the ADC is not used. Tie VREFN to VSS if ADC is not used. (4) Uses the ARM 10-pin interface for SWD. (5) When measuring signals of low frequency, use a low-pass filter to remove noise and to improve ADC performance. Also see Ref. 4. Fig 43. Power, clock, and debug connections SWDIO/PIO0_2 SWCLK/PIO0_3 RESET/PIO0_5 VSS PIO0_12 ADC_0 PIO0_8/XTALIN PIO0_9/XTALOUT VDD VREFP PIO0_6/ADC_1/VDDCMP VREFN LPC82x 3.3 V 3.3 V DGND DGND DGND DGND 1 3 5 7 9 2 4 6 8 10 Note 4 Note 5 Note 5 (ADC_1), Note 3 (VDDCMP) C1 C2 Note 1 DGND DGND Note 2 Note 3 0.01 μF 0.1 μF 3.3 V AGND AGND AGND 10 μF 0.1 μF 0.1 μF ISP select pin n.c. n.c. n.c. SWD connector 3.3 V ~10 kΩ - 100 kΩ ~10 kΩ - 100 kΩ aaa-015073 |
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