ATMEGA168-15AZ Atmel, ATMEGA168-15AZ Datasheet - Page 44

• Manufacturer Part Number: ATMEGA168-15AZ
• Description: MCU AVR 16K FLASH 15MHZ 32-TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA168-15AZ

• Package / Case: 32-TQFP, 32-VQFP
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Speed: 16MHz
• Number Of I /o: 23
• Eeprom Size: 512 x 8
• Core Processor: AVR
• Program Memory Type: FLASH
• Ram Size: 1K x 8
• Program Memory Size: 16KB (16K x 8)
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Connectivity: I²C, SPI, UART/USART
• Core Size: 8-Bit
• Cpu Family: ATmega
• Device Core: AVR
• Device Core Size: 8b
• Frequency (max): 16MHz
• Interface Type: 2-Wire/USART/Serial
• Total Internal Ram Size: 1KB
• # I/os (max): 23
• Number Of Timers - General Purpose: 3
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 2.7V
• On-chip Adc: 8-chx10-bit
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 125C
• Operating Temperature Classification: Automotive
• Mounting: Surface Mount
• Pin Count: 32
• Package Type: TQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

8.0.4
8.0.5
44
ATmega48/88/168 Automotive
External Reset
Brown-out Detection
An External Reset is generated by a low level on the RESET pin. Reset pulses longer than the
minimum pulse width (see
running. Shorter pulses are not guaranteed to generate a reset. When the applied signal
reaches the Reset Threshold Voltage – V
MCU after the Time-out period – t
RSTDISBL fuse, see
Figure 8-4.
ATmega48/88/168 has an On-chip Brown-out Detection (BOD) circuit for monitoring the V
level 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 8-2.
Notes:
BOT
+ V
BODLEVEL 2..0 Fuses
1. V
2. Min/Max values applicable for ATmega48.
HYST
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 and BODLEVEL = 101 for ATmega48V/88V/168V, and BODLEVEL = 101
and BODLEVEL = 101 for ATmega48/88/168.
CC
BOT
/2 and V
External Reset During Operation
BODLEVEL Fuse Coding
may be below nominal minimum operating voltage for some devices. For devices where
111
110
101
100
011
010
001
000
Table 25-6 on page
BOT-
= V
Table 8-1 on page
BOT
- V
TOUT
HYST
– has expired. The External Reset can be disabled by the
Min V
(1)
/2.
RST
281.
1.7
2.5
4.1
(2)
(2)
(2)
BOT
– on its positive edge, the delay counter starts the
43) will generate a reset, even if the clock is not
CC
= V
Typ V
CC
1.8
2.7
4.3
BOT
drops to a voltage where correct
BOD Disabled
BOT
Reserved
during the production test. This guar-
Max V
2.0
2.9
4.5
(2)
(2)
(2)
BOT
7530I–AVR–02/10
Units
BOT+
V
CC
=