AT90USB1286 Atmel Corporation, AT90USB1286 Datasheet - Page 59

• Manufacturer Part Number: AT90USB1286
• Manufacturer: Atmel Corporation

Specifications of AT90USB1286

• Flash (kbytes): 128 Kbytes
• Pin Count: 64
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 48
• Ext Interrupts: 16
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 2
• Twi (i2c): 1
• Uart: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Adc Channels: 8
• Adc Resolution (bits): 10
• Adc Speed (ksps): 15
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 8
• Eeprom (bytes): 4096
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: No
• Temp. Range (deg C): -40 to 85
• I/o Supply Class: 2.7 to 5.5
• Operating Voltage (vcc): 2.7 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 4
• Output Compare Channels: 10
• Input Capture Channels: 1
• Pwm Channels: 9
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

8.4
7593K–AVR–11/09
External Reset
voltage invokes the delay counter, which determines how long the device is kept in RESET after
V
the detection level.
Figure 8-2.
Figure 8-3.
Note:
An External Reset is generated by a low level on the RESET pin. Reset pulses longer than the
minimum pulse width (see
Shorter pulses are not guaranteed to generate a reset. When the applied signal reaches the
Reset Threshold Voltage – V
the Time-out period – t
CC
rise. The RESET signal is activated again, without any delay, when V
INTERNAL
INTERNAL
TIME-OUT
TIME-OUT
RESET
RESET
If V
RESET
RESET
V
V
CC
CC
POR
MCU Start-up, RESET Tied to V
MCU Start-up, RESET Extended Externally
or V
V
V
CCRR
POR
POR
TOUT
parameter range can not be followed, an External Reset is required.
– has expired.
V
V
V
Table
POT
POT
RST
RST
t
– on its positive edge, the delay counter starts the MCU after
TOUT
8-1) will generate a reset, even if the clock is not running.
CC
V
RST
t
TOUT
AT90USB64/128
CC
decreases below
59