IC MCU AVR 4K FLASH 28PDIP

ATMEGA48A-PU

Manufacturer Part NumberATMEGA48A-PU
DescriptionIC MCU AVR 4K FLASH 28PDIP
ManufacturerAtmel
SeriesAVR® ATmega
ATMEGA48A-PU datasheets
 


Specifications of ATMEGA48A-PU

Core ProcessorAVRCore Size8-Bit
Speed20MHzConnectivityI²C, SPI, UART/USART
PeripheralsBrown-out Detect/Reset, POR, PWM, WDTNumber Of I /o23
Program Memory Size4KB (2K x 16)Program Memory TypeFLASH
Eeprom Size256 x 8Ram Size512 x 8
Voltage - Supply (vcc/vdd)1.8 V ~ 5.5 VData ConvertersA/D 6x10b
Oscillator TypeInternalOperating Temperature-40°C ~ 85°C
Package / Case28-DIP (0.300", 7.62mm)Controller Family/seriesAtmega
No. Of I/o's23Eeprom Memory Size256Byte
Ram Memory Size512ByteCpu Speed20MHz
Rohs CompliantYesLead Free Status / RoHS StatusLead free / RoHS Compliant
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Page 362/566

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ATmega48A/48PA/88A/88PA/168A/168PA/328/328
29.2.3
ATmega48PA: Supply Current of IO Modules
The tables and formulas below can be used to calculate the additional current consumption for
the different I/O modules in Active and Idle mode. The enabling or disabling of the I/O modules
are controlled by the Power Reduction Register. See
details.
Table 29-3.
PRR bit
PRUSART0
PRTWI
PRTIM2
PRTIM1
PRTIM0
PRSPI
PRADC
Table 29-4.
PRR bit
PRUSART0
PRTWI
PRTIM2
PRTIM1
PRTIM0
PRSPI
PRADC
It is possible to calculate the typical current consumption based on the numbers from
on page 362
29.2.3.1
Example
Calculate the expected current consumption in idle mode with TIMER1, ADC, and SPI enabled
at V
CC
to add 11.2% for the TIMER1, 22.1% for the ADC, and 17.6% for the SPI module. Reading from
Figure 29-53 on page 359
and F = 1MHz. The total current consumption in idle mode with TIMER1, ADC, and SPI enabled,
gives:
I
CC
total
8271C–AVR–08/10
ATmega48PA: Additional Current Consumption for the different I/O modules
(absolute values)
Typical numbers
V
= 2V, F = 1 MHz
CC
2.9 uA
6.0 uA
5.0 uA
3.6 uA
1.4 uA
5.0 uA
6.1 uA
ATmega48PA: Additional Current Consumption (percentage) in Active and Idle
mode
Additional Current consumption
compared to Active with external
clock (see
Figure 29-48 on page
357
and
Figure 29-49 on page
357)
1.8%
3.9%
2.9%
2.1%
0.8%
3.3%
4.2%
for other V
and frequency settings than listed in
CC
= 2.0V and F = 1MHz. From
Table 29-4 on page
, we find that the idle current consumption is ~0.028 mA at V
0.028 mA (1 + 0.112 + 0.221 + 0.176)
”Power Reduction Register” on page 42
V
= 3V, F = 4 MHz
V
= 5V, F = 8 MHz
CC
CC
20.7 uA
97.4 uA
44.8 uA
219.7 uA
34.5 uA
141.3 uA
24.4 uA
107.7 uA
9.5 uA
38.4 uA
38.0 uA
190.4 uA
47.4 uA
244.7 uA
Additional Current consumption
compared to Idle with external
clock (see
Figure 29-53 on page
359
and
Figure 29-54 on page
360)
11.4%
20.6%
15.7%
11.2%
4.2%
17.6%
22.1%
Table 29-3 on page
362, third column, we see that we need
0.042 mA
for
Table 29-4
362.
= 2.0V
CC
362