ATmega48 Automotive Atmel Corporation, ATmega48 Automotive Datasheet - Page 42
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ATmega48 Automotive
Manufacturer Part Number
ATmega48 Automotive
Description
Manufacturer
Atmel Corporation
Specifications of ATmega48 Automotive
Flash (kbytes)
4 Kbytes
Pin Count
32
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
12
Hardware Qtouch Acquisition
No
Max I/o Pins
23
Ext Interrupts
24
Usb Speed
No
Usb Interface
No
Spi
2
Twi (i2c)
1
Uart
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
8
Adc Resolution (bits)
10
Adc Speed (ksps)
15
Analog Comparators
1
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
0.5
Eeprom (bytes)
256
Self Program Memory
NO
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 125
I/o Supply Class
2.7 to 5.5
Operating Voltage (vcc)
2.7 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
3
Output Compare Channels
6
Input Capture Channels
1
Pwm Channels
6
32khz Rtc
Yes
Calibrated Rc Oscillator
Yes
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9.4
42
External Reset
Atmel ATtiny24/44/84 [Preliminary]
Figure 9-3.
Table 9-1.
Note:
An External Reset is generated by a low level on the RESET pin if enabled. Reset pulses lon-
ger than the minimum pulse width (see
will generate a reset, even if the clock is not running. Shorter pulses are not guaranteed to
generate a reset. When the applied signal reaches the Reset Threshold Voltage – V
its positive edge, the delay counter starts the MCU after the Time-out period – t
expired.
Symbol
V
V
V
V
V
POT
PORMAX
PORMIN
CCRR
RST
INTERNAL
TIME-OUT
RESET
RESET
1. Before rising, the supply has to be between
V
CC
Parameter
Power-on Reset Threshold Voltage (rising)
Power-on Reset Threshold Voltage (falling)
VCC Max. start voltage to ensure internal
Power-on Reset signal
VCC Min. start voltage to ensure internal
Power-on Reset signal
VCC Rise Rate to ensure Power-on Reset
MCU Start-up, RESET Extended Externally
Power On Reset Specifications
RESET Pin Threshold Voltage
V
POT
“System and Reset Characterizations” on page
V
RST
t
TOUT
V
PORMIN
()
and V
0.01
Min
-0.1
V
1.1
0.8
0.1
CC
PORMAX
Typ
1.4
1.3
to ensure a Reset.
0.9V
Max
7701E–AVR–02/11
1.7
1.6
0.4
CC
TOUT
RST
V/ms
– has
Unit
181)
– on
V
V
V
V
V
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