4

7593GS–AVR–03/08

AT90USB64/128

Figure 1-2.

Pinout AT90USB64/128-QFN

Note:

The large center pad underneath the MLF packages is made of metal and internally connected to

GND. It should be soldered or glued to the board to ensure good mechanical stability. If the center

pad is left unconnected, the package might loosen from the board.

1.1

Disclaimer

Typical values contained in this datasheet are based on simulations and characterization of

other AVR microcontrollers manufactured on the same process technology. Min and Max values

will be available after the device is characterized.

2.

Overview

The AT90USB64/128 is a low-power CMOS 8-bit microcontroller based on the AVR enhanced

RISC architecture. By executing powerful instructions in a single clock cycle, the

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AT90USB128

(64-lead QFN top view)

INDEX CORNER

(INT.7/AIN.1/UVcon) PE7

UVcc

D-

D+

UGnd

UCap

VBus

(IUID) PE3

(SS/PCINT0) PB0

(INT.6/AIN.0) PE6

(PCINT1/SCLK) PB1

(PDI/PCINT2/MOSI) PB2

(PDO/PCINT3/MISO) PB3

(PCINT4/OC.2A) PB4

(PCINT5/OC.1A) PB5

(PCINT6/OC.1B) PB6

PA3 (AD3)

PA4 (AD4)

PA5 (AD5)

PA6 (AD6)

PA7 (AD7)

PE2 (ALE/HWB)

PC7 (A15/IC.3/CLKO)

PC6 (A14/OC.3A)

PC5 (A13/OC.3B)

PC4 (A12/OC.3C)

PC3 (A11/T.3)

PC2 (A10)

PC1 (A9)

PC0 (A8)

PE1 (RD)

PE0 (WR)