AT90USB82-16MUR Atmel, AT90USB82-16MUR Datasheet - Page 49

• Manufacturer Part Number: AT90USB82-16MUR
• Description: MCU AVR USB 8K FLASH 32-QFN
• Manufacturer: Atmel
• Series: AVR® 90USBr

Specifications of AT90USB82-16MUR

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 16MHz
• Connectivity: EBI/EMI, PS/2, SPI, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 22
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-QFN
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Interface Type: SPI, USART, debugWIRE
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 22
• Number Of Timers: 2
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• For Use With: ATSTK600 - DEV KIT FOR AVR/AVR32ATSTK526 - KIT STARTER FOR AT90USB82/162ATAVRDRAGON - KIT DRAGON 32KB FLASH MEM AVRATSTK525 - KIT STARTER FOR AT90USBAT90USBKEY2 - KIT DEMO FOR AT90USB
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Data Converters: -
• Lead Free Status / Rohs Status: Details

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
=