ATMEGA48A-MMHR Atmel, ATMEGA48A-MMHR Datasheet - Page 323

• Manufacturer Part Number: ATMEGA48A-MMHR
• Description: IC MCU AVR 4K FLASH 28QFN
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA48A-MMHR

• Package / Case: 28-VQFN Exposed Pad, 28-HVQFN, 28-SQFN, 28-DHVQFN
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Speed: 20MHz
• Number Of I /o: 23
• Eeprom Size: 256 x 8
• Core Processor: AVR
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Program Memory Size: 4KB (4K x 8)
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Connectivity: I²C, SPI, UART/USART
• Core Size: 8-Bit
• 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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