AT90USB1287-16MU Atmel, AT90USB1287-16MU Datasheet - Page 25

• Manufacturer Part Number: AT90USB1287-16MU
• Description: Microcontrollers (MCU) 128kB Flash 4kB EEPROM 48 I/O Pins
• Manufacturer: Atmel

Specifications of AT90USB1287-16MU

• Data Bus Width: 8 bit
• Program Memory Type: Flash
• Program Memory Size: 128 KB
• Data Ram Size: 8 KB
• Interface Type: 2-Wire, SPI, USART
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 48
• Number Of Timers: 4
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-64
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit
• Lead Free Status / Rohs Status: Details
• Other names: AT90USB1287-MU

AT90USB64/128
Problem Fix/workaround
Before entering sleep, interrupts not used to wake up the part from the sleep mode should
be disabled.
1. Asynchronous timer interrupt wake up from sleep generates multiple interrupts
If the CPU core is in sleep and wakes-up from an asynchronous timer interrupt and then go
back in sleep again it may wake up multiple times.
Problem Fix/workaround
A s o ft wa r e wo r k ar o un d i s to w ai t wi t h pe r fo r mi n g th e s l ee p i n st r uc t io n u nt i l
TCNT2>OCR2+1.
25
7593GS–AVR–03/08