AT90USB1286 Atmel Corporation, AT90USB1286 Datasheet - Page 58

• 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

8.3
58
Power-on Reset
AT90USB64/128
Figure 8-1.
Table 8-1.
Notes:
A Power-on Reset (POR) pulse is generated by an On-chip detection circuit. The detection level
is defined in
POR circuit can be used to trigger the start-up Reset, as well as to detect a failure in supply
voltage.
A Power-on Reset (POR) circuit ensures that the device is properly reset from Power-on if Vcc
started from V
Symbol
V
V
V
V
t
CCRR
RST
POR
POT
RST
BODLEVEL [2..0]
1. The POR will not work unless the supply voltage has been below VPOT (falling)
Power-on Reset Threshold Voltage (rising)
Power-on Reset Threshold Voltage (falling)
V
Reset signal
V
Reset signal
Minimum pulse width on RESET Pin
RESET Pin Threshold Voltage
CC
CC
Table
Reset Logic
Reset Characteristics
POR
Start Voltage to ensure internal Power-on
Rise Rate to ensure internal Power_on
with a rise rate upper than V
Pull-up Resistor
8-1. The POR is activated whenever V
JTAG Reset
Register
FILTER
SPIKE
Parameter
CKSEL[3:0]
Power-on Reset
Reset Circuit
SUT[1:0]
Brown-out
Watchdog
Oscillator
Generator
Circuit
Clock
CK
CCRR
Register (MCUSR)
(1)
MCU Status
DATA BUS
. Reaching the Power-on Reset threshold
Delay Counters
Condition
5V, 25°C
CC
is below the detection level. The
Min
-0.1
Vcc
0.3
0.2
TIMEOUT
Typ
400
1.4
1.3
Max
0.85
Vcc
7593K–AVR–11/09
2.3
2.3
0.1
Units
V/ms
ns
V
V
V
V