ATmega48 Atmel Corporation, ATmega48 Datasheet - Page 287

• Manufacturer Part Number: ATmega48
• Manufacturer: Atmel Corporation

Specifications of ATmega48

• Flash (kbytes): 4 Kbytes
• Pin Count: 32
• Max. Operating Frequency: 20 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 85
• I/o Supply Class: 1.8 to 5.5
• Operating Voltage (vcc): 1.8 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

2545T–AVR–05/11
Table 28-5.
Note:
Table 28-6.
Notes:
Extended fuse byte
–
–
–
–
–
BOOTSZ1
BOOTSZ0
BOOTRST
High fuse byte
RSTDISBL
DWEN
SPIEN
WDTON
EESAVE
BODLEVEL2
BODLEVEL1
BODLEVEL0
(2)
1. The default value of BOOTSZ1..0 results in maximum boot size. See
1. See
2. The SPIEN fuse is not accessible in serial programming mode.
3. See
4. See
(3)
(1)
for details.
(4)
(4)
(4)
Extended fuse byte for mega88/168.
Fuse high byte.
“Alternate functions of port C” on page 81
“WDTCSR – Watchdog timer control register” on page 53
Table 29-4 on page 307
Bit no.
Bit no.
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
for BODLEVEL fuse decoding.
Description
–
–
–
–
–
Select boot size
(see
and
for details)
Select boot size
(see
and
for details)
Select reset vector
Description
External reset disable
debugWIRE enable
Enable serial program and
data downloading
Watchdog timer always on
EEPROM memory is
preserved through the chip
erase
Brown-out detector trigger
level
Brown-out detector trigger
level
Brown-out detector trigger
level
Table 27-9 on page 282
Table 27-9 on page 282
Table 27-6 on page 281
Table 27-6 on page 281
for description of RSTDISBL fuse.
ATmega48/88/168
Default value
1
1
1
1
1
0 (programmed)
0 (programmed)
1 (unprogrammed)
Default value
1 (unprogrammed)
1 (unprogrammed)
0 (programmed, SPI
programming enabled)
1 (unprogrammed)
1 (unprogrammed), EEPROM
not reserved
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
for details.
Table 28-11 on page 290
(1)
(1)
287