ATtiny48 Atmel Corporation, ATtiny48 Datasheet - Page 19

• 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

5.2.3
5.2.4
8008H–AVR–04/11
Extended I/O Register File
Data Memory (SRAM)
ATtiny48/88 also contains three general purpose I/O registers that can be used for storing any
information. See GPIOR0, GPIOR1 and GPIOR2 in
general purpose I/O registers are particularly useful for storing global variables and status flags,
since they are accessible to bit-specific instructions such as SBI, CBI, SBIC, SBIS, SBRC, and
SBRS.
Following the standard I/O register file, the next
isters. ATtiny48/88 is a complex microcontroller with more peripheral units than can be
addressed with the IN and OUT instructions. Registers in the extended I/O area must be
accessed using instructions LD/LDD/LDI/LDS and ST/STD/STS. See
on page
See
Following the general purpose register file and the I/O register files, the remaining
tions are reserved for the internal data SRAM.
There are five addressing modes available:
All addressing modes can be used on the entire volatile memory, including the general purpose
register file, the I/O register files and the data memory.
Internal SRAM is accessed in two clk
• Direct. This mode of addressing reaches the entire data space.
• Indirect.
• Indirect with Displacement. This mode of addressing reaches 63 address locations from the
• Indirect with Pre-decrement. In this mode the address register is automatically decremented
• Indirect with Post-increment. In this mode the address register is automatically incremented
base address given by the Y- or Z-register.
before access. Address pointer registers (X, Y, and Z) are located in the general purpose
register file, in registers R26 to R31. See
after access. Address pointer registers (X, Y, and Z) are located in the general purpose
register file, in registers R26 to R31. See
“Register Summary” on page 277
281.
CPU
for a list of I/O registers.
cycles, as illustrated in
“General Purpose Register File” on page
“General Purpose Register File” on page
160
locations are reserved for extended I/O reg-
“Register Summary” on page
Figure
“Instruction Set Summary”
5-2, below.
ATtiny48/88
256/512
277. These
10.
10.
loca-
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