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AT90SCR100 Datasheet(PDF) 400 Page - ATMEL Corporation |
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AT90SCR100 Datasheet(HTML) 400 Page - ATMEL Corporation |
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400 / 433 page  400 TPR0327AY–SMS–30Jan09 AT90SCR100 30.2 Typical Application Table 30-2. External Components, Bill Of Materials Reference Description Value Comment R1, R2 R3, R4 USB Pad Serial Resistor 22 Ω +/-10% - R5 CIO Pull-up Resistor 10K Ω +/-10% (Optional) Can be required for high speed communication Rs DCDC Sense Resistor 200m Ω +/-2% 125mW Current Sensing: Overcurrent detection C1 Power Supply Decoupling capacitor 4.7μF +/-10% Maximum application capacitance allowed by USB standard is 10μF C2 Power Supply Filter capacitor 100nF - C3 Internal Core Regulator Decoupling capacitor 2.2μF +/-10% Used for internal regulator stability C4 Internal USB Regulator Decoupling capacitor 2.2μF +/-10% Used for internal regulator stability C5, C6 PLL Filter capacitors 47pF +/-10% - C7, C8 RTC Filter capacitors 22pF +/-10% Only if Real Time Counter is used. C9 DCDC Decoupling Capacitor 10μF +/-10% esr=100m Ω Tantalum capacitor is needed Recommended: AVX: TPSE106-035-200 L1 DCDC inductance 6.8μH esr=20.2m Ω Recommended: Gowanda: SMP3316LP-681M Q1 Crystal 8.0 Mhz Q2 Real Time Crystal 3.768 Mhz Only if Real Time Counter is used Rled/Dled LED mechanism -- Depends on the configuration of the Led Controller Vss C1 3.3V C2 R1 R2 C3 C4 Vss2 Vss3 AVss CVcc CVsense CC4 CC8 CIO CVss RST D+ D- D+ D- RESET : As DCDC generates noise, we encourage the use of another supply power than global Vcc, if possible. Vcc4 Vcc3 Vcc2 Vcc1 Vdcdc DVcc XTAL1 XTAL2 UCAP Vcc AT90SCR100 Host C5 C6 Q1 3.3V R3 R4 R5 Rs Rled Dled RTC1 RTC2 Led0 Li Lo C7 C8 L1 Q2 C9 Card Vcc Card C4/D+ Card C8/D- Card IO (1) (1) 3.3V |
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