ATtiny28L Atmel Corporation, ATtiny28L Datasheet - Page 10

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ATtiny28L

Manufacturer Part Number
ATtiny28L
Description
Manufacturer
Atmel Corporation
Datasheets

Specifications of ATtiny28L

Flash (kbytes)
2 Kbytes
Pin Count
28
Max. Operating Frequency
4 MHz
Cpu
8-bit AVR
Hardware Qtouch Acquisition
No
Max I/o Pins
11
Ext Interrupts
10
Usb Speed
No
Usb Interface
No
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Analog Comparators
1
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
0.03
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
1
32khz Rtc
No
Calibrated Rc Oscillator
Yes
Memories
I/O Memory
10
ATtiny28L/V
The I/O space definition of the ATtiny28 is shown in Table 3.
Table 3. ATtiny28 I/O Space
Note:
All ATtiny28 I/O and peripherals are placed in the I/O space. The I/O locations are
accessed by the IN and OUT instructions transferring data between the 32 general-pur-
pose working registers and the I/O space. I/O registers within the address range $00 -
$1F 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 instructions. Refer to
the Instruction Set section for more details.
For compatibility with future devices, reserved bits should be written to zero if accessed.
Reserved I/O memory addresses should never be written.
The I/O and peripherals control registers are explained in the following sections.
Address Hex
$3F
$1B
$1A
$19
$16
$12
$11
$10
$08
$07
$06
$05
$04
$03
$02
$01
$00
Reserved and unused locations are not shown in the table.
Name
SREG
PORTA
PACR
PINA
PINB
PORTD
DDRD
PIND
ACSR
MCUCS
ICR
IFR
TCCR0
TCNT0
MODCR
WDTCR
OSCCAL
Function
Status Register
Data Register, Port A
Port A Control Register
Input Pins, Port A
Input Pins, Port B
Data Register, Port D
Data Direction Register, Port D
Input Pins, Port D
Analog Comparator Control and Status Register
MCU Control and Status Register
Interrupt Control Register
Interrupt Flag Register
Timer/Counter0 Control Register
Timer/Counter0 (8-bit)
Modulation Control Register
Watchdog Timer Control Register
Oscillator Calibration Register
1062F–AVR–07/06

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