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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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ST25R100 датащи(PDF) 13 Page - STMicroelectronics |
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ST25R100 датащи(HTML) 13 Page - STMicroelectronics |
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13 / 86 page  5.3 Supply system The ST25R100 features two positive supply pins: • VDD_IO is used to define the supply level for digital communication pins (MISO, MOSI, SCLK, BSS, and IRQ). Digital communication pins interface with ST25R100 logic through level shifters, therefore the internal supply voltage can be either higher or lower than VDD_IO. • VDD is the main power supply pin. It supplies the ST25R100 blocks through the following: – Regulator VDD_D – Regulator VDD_A – Regulator VDD_DR – Regulator VDD_AM The recommended blocking capacitors for supply pins are as following: • 2.2 μF in parallel with 10 nF for: VDD, VDD_DR, VDD_D, and VDD_AM (pin 5, 6, 7, and 8) • 1 μF in parallel with 10 nF for AGD and VDD_IO (pin 3 and 15) Figure 7. Supply system VDD PD VDD_D VDD_A REG AUTOREG BGR VDD_D REG AGD Buff VDD_AM VDD_DR VDD_A AGDC VDD_D VDD_A1 VDD_DR REG VDD_AM REG POR Note: • BGR: Bandgap reference • AUTOREG: Automatic regulator adjustment ST25R100 Application information DS14139 - Rev 5 page 13/86 |
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