ATmega168 Automotive Atmel Corporation, ATmega168 Automotive Datasheet - Page 42
ATmega168 Automotive
Manufacturer Part Number
ATmega168 Automotive
Description
Manufacturer
Atmel Corporation
Datasheets
1.AT90CAN128_AUTOMOTIVE.pdf
(225 pages)
2.ATMEGA168_AUTOMOTIVE.pdf
(19 pages)
3.ATMEGA168_AUTOMOTIVE.pdf
(340 pages)
Specifications of ATmega168 Automotive
Flash (kbytes)
16 Kbytes
Pin Count
32
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
16
Hardware Qtouch Acquisition
No
Max I/o Pins
23
Ext Interrupts
24
Usb Speed
No
Usb Interface
No
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)
1
Eeprom (bytes)
512
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 150
I/o Supply Class
2.7 to 5.5
Operating Voltage (vcc)
2.7 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
3
Output Compare Channels
6
Input Capture Channels
1
Pwm Channels
6
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
- AT90CAN128_AUTOMOTIVE PDF datasheet
- ATMEGA168_AUTOMOTIVE PDF datasheet #2
- ATMEGA168_AUTOMOTIVE PDF datasheet #3
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8.0.2
8.0.3
42
ATmega48/88/168 Automotive
Reset Sources
Power-on Reset
The ATmega48/88/168 has four sources of reset:
Figure 8-1.
A Power-on Reset (POR) pulse is generated by an On-chip detection circuit. The detection level
is defined in
level. The 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 reset from Power-on. Reaching the
Power-on Reset threshold voltage invokes the delay counter, which determines how long the
device is kept in RESET after V
when V
• Power-on Reset. The MCU is reset when the supply voltage is below the Power-on Reset
• External Reset. The MCU is reset when a low level is present on the RESET pin for longer
• Watchdog System Reset. The MCU is reset when the Watchdog Timer period expires and
• Brown-out Reset. The MCU is reset when the supply voltage V
threshold (V
than the minimum pulse length.
the Watchdog System Reset mode is enabled.
Reset threshold (V
BODLEVEL [2..0]
RSTDISBL
CC
decreases below the detection level.
Table 8-1 on page
Reset Logic
POT
).
Pull-up Resistor
FILTER
SPIKE
BOT
) and the Brown-out Detector is enabled.
CC
43. The POR is activated whenever V
CKSEL[3:0]
rise. The RESET signal is activated again, without any delay,
Power-on Reset
Reset Circuit
SUT[1:0]
Brown-out
Watchdog
Oscillator
Generator
Circuit
Clock
CK
Register (MCUSR)
MCU Status
DATA BUS
Delay Counters
CC
is below the Brown-out
CC
TIMEOUT
is below the detection
7530I–AVR–02/10
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