ATmega48 Automotive Atmel Corporation, ATmega48 Automotive Datasheet - Page 41
![no-image](/images/manufacturer_photos/0/0/79/atmel_corporation_sml.jpg)
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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9.3
7701E–AVR–02/11
Power-on Reset
Figure 9-1.
A Power-on Reset (POR) pulse is generated by an On-chip detection circuit. The detection
level is defined in
whenever V
Reset, as well as to detect a failure in supply voltage.
A POR circuit ensures that the device is reset from power-on. Reaching the power-on reset
threshold voltage invokes the delay counter, which determines how long the device is kept in
RESET after V
decreases below the detection level.
Figure 9-2.
INTERNAL
V
TIME-OUT
BODLEVEL [1..0]
CC
RESET
RESET
V
CC
CCRR
Reset Logic
MCU Start-up, RESET Tied to V
is below the detection level. The POR circuit can be used to trigger the Start-up
CC
“System and Reset Characterizations” on page
Pull-up Resistor
rise. The RESET signal is activated again, without any delay, when V
FILTER
SPIKE
V
V
V
RST
PORMA X
PORMIN
Atmel ATtiny24/44/84 [Preliminary]
t
TOUT
CKSEL[1:0]
Power-on Reset
Reset Circuit
SUT[1:0]
Brown-out
Watchdog
Oscillator
Generator
Circuit
Clock
CK
CC
Register (MCUSR)
MCU Status
DATA BUS
Delay Counters
181. The POR is activated
TIMEOUT
41
CC
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