ATtiny44 Automotive Atmel Corporation, ATtiny44 Automotive Datasheet - Page 21
ATtiny44 Automotive
Manufacturer Part Number
ATtiny44 Automotive
Description
Manufacturer
Atmel Corporation
Specifications of ATtiny44 Automotive
Flash (kbytes)
4 Kbytes
Pin Count
14
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
6
Hardware Qtouch Acquisition
No
Max I/o Pins
12
Ext Interrupts
12
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)
256
Self Program Memory
YES
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
2
Output Compare Channels
4
Input Capture Channels
1
Pwm Channels
4
32khz Rtc
No
Calibrated Rc Oscillator
Yes
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6.4
6.4.1
7701E–AVR–02/11
I/O Memory
General Purpose I/O Registers
The I/O space definition of the Atmel
page
All Atmel ATtiny24/44/84 I/Os and peripherals are placed in the I/O space. All I/O locations
may be accessed by the LD/LDS/LDD and ST/STS/STD instructions, transferring data
between the 32 general purpose working registers and the I/O space. I/O registers within the
address range 0x00 - 0x1F are directly bit-accessible using the SBI and CBI instructions. In
these registers, the value of single bits can be checked by using the SBIS and SBIC instruc-
tions. See the instruction set summary for more details. When using the I/O specific
commands IN and OUT, the I/O addresses 0x00 - 0x3F must be used. When addressing I/O
registers as data space using LD and ST instructions, 0x20 must be added to these
addresses.
For compatibility with future devices, reserved bits should be written with a logical zero if
accessed. Reserved I/O memory addresses should never be written.
Some of the status flags are cleared by writing a logical one to them. Note that, unlike most
other AVR
therefore, be used on registers containing such status flags. The CBI and SBI instructions
work with registers 0x00 to 0x1F only.
The I/O and peripherals control registers are explained in later sections.
The ATtiny24/44/84 contains three General Purpose I/O Registers. These registers can be
used for storing any information, and they are particularly useful for storing global variables
and status flags. General Purpose I/O Registers within the address range 0x00 - 0x1F are
directly bit-accessible using the SBI, CBI, SBIS, and SBIC instructions.
210.
®
s, the CBI and SBI instructions will only operate on the specified bit, and can,
Atmel ATtiny24/44/84 [Preliminary]
®
ATtiny24/44/84 is shown in
“Register Summary” on
21
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