AT43USB325 datasheet(5/109 Pages) ATMEL

Part #	AT43USB325

Description	Multimedia USB Keyboard Controller with Embedded Hub

PDF	109 Pages

Scroll/Zoom	100%

Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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5 / 109 page

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

AT43USB325 Datasheet(PDF) 5 Page - ATMEL Corporation