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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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AT90SCR100 Fiches technique(PDF) 5 Page - ATMEL Corporation |
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AT90SCR100 Fiches technique(HTML) 5 Page - ATMEL Corporation |
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5 / 433 page  5 TPR0327AY–SMS–30Jan09 AT90SCR100 2. Pin List Configuration • 2 package configurations to answer different needs – 32pins: LowPinCount package: for small package size, useful for small embedded systems (AT90SCR100L and AT90SCR100LS) – 64pins: FullPinCount: For full performance advanced reader (AT90SCR100H) On Full Pin Count (FPC) package, the only supported package type is QFN, and all the Vss signals are connected to the e-pad. It is important to have it fully sol- dered on groundplane of final PCB. • USBReg refers to 3.3V USB specific regulator • PCINTx refer to Pin Change Interrupts. See “External Interrupt Registers” on page 69. Beware of the multiple functionality supported on each port. All functionnality may be active at the same time. The only way to disable a feature is to deactive it inside the corresponding peripheral block. Caution ! Note Caution ! Table 2-1. Pin List Configuration ID Configuration, Role Vcc x x x - Vcc Voltage Supply Vss1 x x e (1) Vss1 Ground AVss x x e (1) AVss PLL Ground RST x x x Vcc RST Reset signal: Drive low to reinitialize the chip Xtal1 x x x XTAL1 Clock Input: Support up to 8 Mhz crystals Xtal2 x x x XTAL2 DVcc x x x DVcc Digital Vcc :Used for internal regulator decoupling Vcc2 x x x - Vcc2 Voltage Supply: To be tied to same supply voltage as Vcc Vcc3 - - x Vcc3 Voltage Supply: To be tied to same supply voltage as Vcc Vcc4 - - x Vcc4 Voltage Supply: To be tied to same supply voltage as Vcc Vcc5 - - x Vcc5 Voltage Supply: To be tied to same supply voltage as Vcc Vdcdc x x x Vdcdc Voltage Supply for DC/DC Converter. Vss2 x x e(1) Vss2 Second Vss: To be tied to Vss Vss3 x x e (1) Vss3 Third Vss: To be tied to Vss D+ x x x USB Reg D+ USB Interface D- x x x D- UCap x x x UCap USB Decoupling : Used for specific USB regulator decoupling |
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