ATMEGA48P-20MMUR Atmel, ATMEGA48P-20MMUR Datasheet - Page 322

• Manufacturer Part Number: ATMEGA48P-20MMUR
• Description: MCU AVR 4K FLASH 20MHZ 28QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA48P-20MMUR

• 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 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: *
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

29. Typical Characteristics
29.1
29.1.1
8025L–AVR–7/10
ATmega48P Typical Characteristics
Active Supply Current
The following charts show typical behavior. These figures are not tested during manufacturing.
All current consumption measurements are performed with all I/O pins configured as inputs and
with internal pull-ups enabled. A square wave generator with rail-to-rail output is used as clock
source.
All Active- and Idle current consumption measurements are done with all bits in the PRR register
set and thus, the corresponding I/O modules are turned off. Also the Analog Comparator is dis-
abled during these measurements. The
and
every I/O module controlled by the Power Reduction Register. See
on page 43
The power consumption in Power-down mode is independent of clock selection.
The current consumption is a function of several factors such as: operating voltage, operating
frequency, loading of I/O pins, switching rate of I/O pins, code executed and ambient tempera-
ture. The dominating factors are operating voltage and frequency.
The current drawn from capacitive loaded pins may be estimated (for one pin) as C
C
The parts are characterized at frequencies higher than test limits. Parts are not guaranteed to
function properly at frequencies higher than the ordering code indicates.
The difference between current consumption in Power-down mode with Watchdog Timer
enabled and Power-down mode with Watchdog Timer disabled represents the differential cur-
rent drawn by the Watchdog Timer.
Figure 29-1. Active Supply Current vs. Low Frequency (0.1-1.0 MHz).
L
= load capacitance, V
page 375
1.4
1.2
0.8
0.6
0.4
0.2
for details.
1
0
shows the additional current consumption compared to I
0
0.1
CC
0.2
= operating voltage and f = average switching frequency of I/O pin.
0.3
”Supply Current of IO Modules” on page
0.4
Frequency (MHz)
0.5
0.6
ATmega48P/88P/168P
0.7
0.8
”Power Reduction Register”
CC
0.9
Active and I
1
327,
5.5 V
5.0 V
4.5 V
4.0 V
3.3 V
2.7 V
1.8 V
L
*
V
CC
CC
page 351
*f where
Idle for
322