ATMEGA48A-AU Atmel, ATMEGA48A-AU Datasheet - Page 323

• Manufacturer Part Number: ATMEGA48A-AU
• Description: IC MCU AVR 4K FLASH 32TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA48A-AU

• 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: 4KB (2K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 512 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-TQFP, 32-VQFP
• Controller Family/series: Atmega
• No. Of I/o's: 23
• Eeprom Memory Size: 256Byte
• Ram Memory Size: 512Byte
• Cpu Speed: 20MHz
• Rohs Compliant: Yes
• Processor Series: ATmega
• Core: AVR
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Interface Type: TWI, SPI, USART
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 23
• Number Of Timers: 3
• Operating Supply Voltage: 3.3 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Operating Temperature Range: - 40 C to + 85 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

28.5
Table 28-12. Reset, Brown-out and Internal Voltage Characteristics
Notes:
Table 28-13. BODLEVEL Fuse Coding
Notes:
8271C–AVR–08/10
Symbol
SR
V
V
V
t
t
V
t
I
RST
HYST
BOD
POT
RST
BG
BG
BG
ON
System and Reset Characteristics
1. Values are guidelines only.
2. The Power-on Reset will not work unless the supply voltage has been below V
1. V
tested down to V
a voltage where correct operation of the microcontroller is no longer guaranteed. The test is performed using
BODLEVEL = 110, 101 and 100.
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
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
ATmega48A/48PA/88A/88PA/168A/168PA/328/328
= V
BOT
during the production test. This guarantees that a Brown-Out Reset will occur before V
(1)
Min. V
(2)
1.7
2.5
4.1
BOT
V
T
V
T
V
T
A
A
A
CC
CC
CC
=25°C
=25°C
=25°C
(1)
=2.7
=2.7
=2.7
Typ V
1.8
2.7
4.3
BOD Disabled
BOT
Reserved
0.2 V
POT
Min.
0.01
1.1
0.6
1.0
(falling)
CC
Max V
Typ
1.4
1.3
1.1
50
40
10
2
2.0
2.9
4.5
BOT
0.9 V
Max
1.6
1.6
2.5
1.2
10
70
CC
CC
Units
drops to
V
Units
V/ms
mV
µA
µs
µs
µs
V
V
V
V
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