ATMEGA48-20PU Atmel, ATMEGA48-20PU Datasheet - Page 321

• Manufacturer Part Number: ATMEGA48-20PU
• Description: IC AVR MCU 4K 20MHZ 5V 28DIP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA48-20PU

• 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): 2.7 V ~ 5.5 V
• Data Converters: A/D 6x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 28-DIP (0.300", 7.62mm)
• Processor Series: ATMEGA48x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Interface Type: 2-Wire/SPI/USART/Serial
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 23
• Number Of Timers: 3
• Operating Supply Voltage: 2.7 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: Through Hole
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 6-ch x 10-bit
• Cpu Family: ATmega
• Device Core: AVR
• Device Core Size: 8b
• Frequency (max): 20MHz
• Total Internal Ram Size: 512Byte
• # 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
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Through Hole
• Pin Count: 28
• Package Type: PDIP
• For Use With: ATSTK600-TQFP32 - STK600 SOCKET/ADAPTER 32-TQFPATSTK600 - DEV KIT FOR AVR/AVR32770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAGATAVRDRAGON - KIT DRAGON 32KB FLASH MEM AVRATAVRISP2 - PROGRAMMER AVR IN SYSTEMATJTAGICE2 - AVR ON-CHIP D-BUG SYSTEM
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

29.3.0.1
29.3.0.2
29.3.0.3
2545S–AVR–07/10
Example 1
Example 2
Example 3
Table 29-2.
It is possible to calculate the typical current consumption based on the numbers from Table 2 for
other V
Calculate the expected current consumption in idle mode with USART0, TIMER1, and TWI
enabled at V
18% for the USART0, 26% for the TWI, and 11% for the TIMER1 module. Reading from Figure
3, we find that the idle current consumption is ~0,075 mA at V
current consumption in idle mode with USART0, TIMER1, and TWI enabled, gives:
Same conditions as in example 1, but in active mode instead. From Table 2, second column we
see that we need to add 3.3% for the USART0, 4.8% for the TWI, and 2.0% for the TIMER1
module. Reading from Figure 1, we find that the active current consumption is ~0,42 mA at V
= 3.0V and F = 1 MHz. The total current consumption in idle mode with USART0, TIMER1, and
TWI enabled, gives:
All I/O modules should be enabled. Calculate the expected current consumption in active mode
at V
to be ~ 4.0 mA (from Figure 2). Then, by using the numbers from Table 2 - second column, we
find the total current consumption:
I
I
I
CC
CC
CC
PRR bit
PRTIM1
PRTIM0
PRSPI
PRADC
total
total
total
CC
≈
≈
≈
= 3.6V and F = 10 MHz. We find the active current consumption without the I/O modules
CC
0.075mA
0.42mA
4.0mA
and frequency settings than listed in Table 1.
CC
•
Additional Current Consumption (percentage) in Active and Idle mode
•
(
= 3.0V and F = 1 MHz. From Table 2, third column, we see that we need to add
•
1
(
1
(
+
1
+
Additional Current consumption
compared to Active with external
clock
(see
2.0%
1.6%
6.1%
4.9%
0.033
+
0.033
0.18
Figure 29-1
+
+
+
0.048
0.26
0.048
+
+
+
0.11
0.047
and
0.02
)
)
Figure
≈
+
≈
0.116mA
0.02
0.46mA
+
29-2)
0.016
+
0.061
Additional Current consumption
compared to Idle with external clock
(see
11%
8.5%
33%
26%
+
CC
ATmega48/88/168
0.049
Figure 29-7
= 3.0V and F = 1 MHz. The total
)
≈
5.1mA
and
Figure
29-8)
321
CC