ATmega162 Atmel Corporation, ATmega162 Datasheet - Page 50

• Manufacturer Part Number: ATmega162
• Manufacturer: Atmel Corporation

Specifications of ATmega162

• Flash (kbytes): 16 Kbytes
• Pin Count: 44
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 16
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 35
• Ext Interrupts: 3
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Uart: 2
• Graphic Lcd: No
• Video Decoder: No
• Camera Interface: No
• Analog Comparators: 1
• Resistive Touch Screen: No
• Temp. Sensor: No
• Crypto Engine: No
• Sram (kbytes): 1
• 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: 1.8 to 5.5
• Operating Voltage (vcc): 1.8 to 5.5
• Fpu: No
• Mpu / Mmu: no / no
• Timers: 4
• Output Compare Channels: 6
• Input Capture Channels: 2
• Pwm Channels: 6
• 32khz Rtc: Yes
• Calibrated Rc Oscillator: Yes

Brown-out Detection
50
ATmega162/V
ATmega162 has an On-chip Brown-out Detection (BOD) circuit for monitoring the V
ing 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 19. BODLEVEL Fuse Coding
Notes:
Table 20. Brown-out Hysteresis
When the BOD is enabled and V
25), the Brown-out Reset is immediately activated. When V
(V
expired.
The BOD circuit will only detect a drop in V
ger than t
BODLEVEL Fuses [2:0]
111
110
101
100
011
010
001
000
BOT
BOT+
Symbol
V
t
(2)
(2)
HYST
BOD
+ V
in
1. V
2. For ATmega162V. Otherwise reserved.
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. This test is performed using
BODLEVEL = 110 for ATmega162V, BODLEVEL = 101 and BODLEVEL = 100 for
ATmega162.
BOT
/2 and V
given in
Parameter
Brown-out Detector hysteresis
Min Pulse Width on Brown-out Reset
may be below nominal minimum operating voltage for some devices. For devices where
25), the delay counter starts the MCU after the Time-out period t
BOT-
Table
= V
18.
BOT
Min. V
CC
- V
decreases to a value below the trigger level (V
HYST
1.7
2.5
4.1
2.1
BOT
/2.
(1)
CC
if the voltage stays below the trigger level for lon-
Typ. V
Min.
1.8
2.7
4.3
2.3
BOD Disabled
CC
Reserved
BOT
= V
BOT
CC
CC
Typ.
50
2
during the production test. This guar-
increases above the trigger level
drops to a voltage where correct
Max. V
2.0
2.9
4.5
2.5
Max.
BOT
Units
mV
Units
µs
2513K–AVR–07/09
V
BOT-
CC
level dur-
TOUT
in
BOT+
Figure
has
=