AT90USB162 Atmel Corporation, AT90USB162 Datasheet - Page 49

• Manufacturer Part Number: AT90USB162
• Manufacturer: Atmel Corporation

Specifications of AT90USB162

• Flash (kbytes): 16 Kbytes
• Pin Count: 32
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 22
• Ext Interrupts: 21
• Usb Transceiver: 1
• Usb Speed: Full Speed
• Usb Interface: Device
• Spi: 2
• Uart: 1
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 0.5
• Eeprom (bytes): 512
• 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: 2
• Output Compare Channels: 5
• Input Capture Channels: 1
• Pwm Channels: 4
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

9.5
7707F–AVR–11/10
Brown-out Detection
AT90USB82/162 has an On-chip Brown-out Detection (BOD) circuit for monitoring the V
during operation by comparing it to a fixed trigger level. The trigger level for the BOD can be
selected by the BODLEVEL Fuses. The trigger level has a hysteresis to ensure spike free
Brown-out Detection. The hysteresis on the detection level should be interpreted as V
V
Table 9-2.
Note:
Table 9-3.
When the BOD is enabled, and V
9-5), the Brown-out Reset is immediately activated. When V
(V
expired.
The BOD circuit will only detect a drop in V
ger than t
Symbol
V
t
BOT
BOD
BOT+
HYST
+ V
BODLEVEL 2..0 Fuses
in
1. V
HYST
BOD
Figure
this is the case, the device is tested down to V
antees that a Brown-Out Reset will occur before V
operation of the microcontroller is no longer guaranteed. The test is performed using
BODLEVEL = 110 for AT90USB82/162 and BODLEVEL = 101 for AT90USB82/162L.
BOT
/2 and V
given in
Parameter
Brown-out Detector Hysteresis
Min Pulse Width on Brown-out Reset
BODLEVEL Fuse Coding
Brown-out Characteristics
may be below nominal minimum operating voltage for some devices. For devices where
111
110
101
100
011
010
001
000
9-5), the delay counter starts the MCU after the Time-out period t
BOT-
Table
= V
9-1.
BOT
- V
CC
HYST
decreases to a value below the trigger level (V
Min V
(1)
/2.
2.5
2.7
2.8
3.3
3.4
3.8
4.1
CC
BOT
if the voltage stays below the trigger level for lon-
CC
= V
Typ V
CC
2.7
2.9
3.0
3.5
3.6
4.0
4.3
BOT
drops to a voltage where correct
BOD Disabled
CC
BOT
during the production test. This guar-
Min
increases above the trigger level
AT90USB82/162
Typ
50
Max V
2
2.9
3.1
3.2
3.7
3.8
4.2
4.5
BOT
Max
BOT-
TOUT
in
Units
Units
CC
mV
BOT+
ns
Figure
V
level
has
49
=