ATtiny48 Atmel Corporation, ATtiny48 Datasheet - Page 189

• Manufacturer Part Number: ATtiny48
• Manufacturer: Atmel Corporation

Specifications of ATtiny48

• Flash (kbytes): 4 Kbytes
• Pin Count: 32
• Max. Operating Frequency: 12 MHz
• Cpu: 8-bit AVR
• # Of Touch Channels: 12
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 28
• Ext Interrupts: 28
• Usb Speed: No
• Usb Interface: No
• Spi: 1
• Twi (i2c): 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: Yes
• Crypto Engine: No
• Sram (kbytes): 0.25
• Eeprom (bytes): 64
• Self Program Memory: YES
• Dram Memory: No
• Nand Interface: No
• Picopower: Yes
• 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: 2
• Output Compare Channels: 4
• Input Capture Channels: 1
• Pwm Channels: 2
• 32khz Rtc: No
• Calibrated Rc Oscillator: Yes

20.2
8008H–AVR–04/11
Fuse Bits
The ATtiny48/88 has three Fuse bytes.
of all the fuses and how they are mapped into the Fuse bytes. Note that the fuses are read as
logical zero, “0”, if they are programmed.
Table 20-3.
Notes:
Table 20-4.
Notes:
Fuse Extended Byte
–
–
–
–
–
–
–
SELFPRGEN
Fuse High Byte
RSTDISBL
DWEN
SPIEN
WDTON
EESAVE
BODLEVEL2
BODLEVEL1
BODLEVEL0
(3)
(2)
1. Enables SPM instruction. See
1. See
2. Programming this fuse bit will change the functionality of the RESET pin and render further
3. The SPIEN Fuse is not accessible in serial programming mode.
4. See
5. See
(4)
(1) (2)
programming via the serial interface impossible. The fuse bit can be unprogrammed using the
parallel programming algorithm (see
(5)
(5)
(5)
(1)
Fuse Extended Byte
Fuse High Byte
“Alternate Functions of Port C” on page 72
“WDTCSR – Watchdog Timer Control Register” on page 49
Table 22-4 on page 210
Bit No
Bit No
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
Description
External Reset Disable
debugWIRE Enable
Enable Serial Program and Data
Downloading
Watchdog Timer Always On
EEPROM memory preserved
through chip erase
Brown-out Detector trigger level
Brown-out Detector trigger level
Brown-out Detector trigger level
for BODLEVEL Fuse decoding.
Description
–
–
–
–
–
–
–
Self Programming Enable
“Self-Programming the Flash” on page
Table 20-3
page
191).
–
Table 20-5
for description of RSTDISBL Fuse.
describe briefly the functionality
Default Value
1 (unprogrammed)
1 (unprogrammed)
0 (programmed)
(SPI programming enabled)
1 (unprogrammed)
1 (unprogrammed)
(EEPROM not preserved)
1 (unprogrammed)
1 (unprogrammed)
1 (unprogrammed)
Default Value
1
1
1
1
1
1
1
1 (unprogrammed)
for details.
ATtiny48/88
183.
189