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AT43USB325E-AC Folha de dados(PDF) 5 Page - ATMEL Corporation |
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AT43USB325E-AC Folha de dados(HTML) 5 Page - ATMEL Corporation |
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5 / 109 page  5 3355C–USB–4/05 AT43USB325 Note: Signal names ending with an N are active low. PF[1:3] Bi-directional Port F[1:3] – Bi-directional I/O port. In the AT43USB325E, these port pins have dual functions as the interface pins to the serial EEPROM as shown below: NC/SSN Output No Connect/Slave Select – In the AT43USB325M this pin is not used. In the AT43USB325E this pin is the SPI slave select input used for enabling the serial memory during program memory downloading. TEST Input Test Pin – This pin should be tied to ground. RESETN Input Reset – Active low 1.3 Signal Description (Continued) Name Type Function Port Pin Alternate Function 1 (AT43USB325E only) Alternate Function 2 PF1 SCK, SPI Master Clock Out OC1A, Timer/Counter1 Output Compare A PF2 SI, SPI Slave Data Input OC1B, Timer/Counter1 Output Compare B PF3 SO, SPI Slave Data Out ICP, Timer/Counter1 Input Capture |
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