ATMEGA88-20AU Atmel, ATMEGA88-20AU Datasheet - Page 306

• Manufacturer Part Number: ATMEGA88-20AU
• Description: IC AVR MCU 8K 20MHZ 5V 32TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA88-20AU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 23
• Program Memory Size: 8KB (4K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 512 x 8
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-TQFP, 32-VQFP
• Package: 32TQFP
• Device Core: AVR
• Family Name: ATmega
• Maximum Speed: 20 MHz
• Operating Supply Voltage: 3.3|5 V
• Data Bus Width: 8 Bit
• Number Of Programmable I/os: 23
• Interface Type: SPI/TWI/USART
• On-chip Adc: 8-chx10-bit
• Number Of Timers: 3
• Processor Series: ATMEGA8x
• Core: AVR8
• Data Ram Size: 1 KB
• Maximum Clock Frequency: 20 MHz
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT, ATAVRTS2080A, ATASTK512-EK1-IND
• Minimum Operating Temperature: - 40 C
• For Use With: ATAVRDRAGON - KIT DRAGON 32KB FLASH MEM AVRATAVRISP2 - PROGRAMMER AVR IN SYSTEM
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

28.5
Table 28-3.
Note:
Table 28-4.
Notes:
306
Symbol
V
V
V
V
PONSR
t
t
V
t
I
RST
HYST
BOD
POT
RST
BG
BG
BG
System and Reset Characteristics
1. The Power-on Reset will not work unless the supply voltage has been below V
1. V
ATmega48/88/168
tested down to V
a voltage where correct 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 = 100 for
ATmega48/88/168.
BODLEVEL 2:0 Fuses
BOT
Parameter
Power-on Reset Threshold Voltage (rising)
Power-on Reset Threshold Voltage (falling)
Power-on Slope Rate
Minimum pulse width on RESET Pin
Brown-out Detector Hysteresis
Min Pulse Width on Brown-out Reset
Bandgap reference voltage
Bandgap reference start-up time
Bandgap reference current consumption
RESET Pin Threshold Voltage
Reset, Brown-out and Internal voltage Characteristics
BODLEVEL Fuse Coding
may be below nominal minimum operating voltage for some devices. For devices where this is the case, the device is
111
110
101
100
011
010
001
000
CC
= V
BOT
during the production test. This guarantees that a Brown-Out Reset will occur before V
(1)
(1)
Min V
1.7
2.5
4.1
BOT
Condition
V
T
V
T
V
T
A
A
A
CC
CC
CC
= 25°C
= 25°C
= 25°C
= 2.7
= 2.7
= 2.7
Typ V
1.8
2.7
4.3
BOD Disabled
BOT
Reserved
POT
0.2 V
0.05
0.01
Min
0.7
1.0
(falling).
CC
Max V
Typ
1.0
0.9
1.1
50
40
10
2
2.0
2.9
4.5
BOT
0.9 V
Max
1.4
1.3
4.5
2.5
1.2
70
2545S–AVR–07/10
CC
CC
Units
V
drops to
Units
V/ms
mV
µA
µs
µs
µs
V
V
V