ATtiny28L

Manufacturer Part NumberATtiny28L
ManufacturerAtmel Corporation
ATtiny28L datasheets
 

Specifications of ATtiny28L

Flash (kbytes)2 KbytesPin Count28
Max. Operating Frequency4 MHzCpu8-bit AVR
Hardware Qtouch AcquisitionNoMax I/o Pins11
Ext Interrupts10Usb SpeedNo
Usb InterfaceNoGraphic LcdNo
Video DecoderNoCamera InterfaceNo
Analog Comparators1Resistive Touch ScreenNo
Temp. SensorNoCrypto EngineNo
Sram (kbytes)0.03Self Program MemoryNO
Dram MemoryNoNand InterfaceNo
PicopowerNoTemp. Range (deg C)-40 to 85
I/o Supply Class1.8 to 5.5Operating Voltage (vcc)1.8 to 5.5
FpuNoMpu / Mmuno / no
Timers132khz RtcNo
Calibrated Rc OscillatorYes  
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Port A Schematics
ATtiny28L/V
26
Note that all port pins are synchronized. The synchronization latches are, however, not
shown in the figures.
Figure 21. Port A Schematic Diagram (Pins PA0, PA1 and PA3)
MOS
PULL-
UP
RESET
R
PAn
Q
D
C
WP:
WRITE PORTA
WD:
WRITE DDRA
RL:
READ PORTA LATCH
RP:
READ PORTA PIN
RD:
READ DDRA
n:
0,1,3
Figure 22. Port A Schematic Diagram (Pin PA2)
HARDWARE
PA2
MODULATOR
WP:
WRITE PORTA
RL:
READ PORTA LATCH
Note: Both the flip-flops shown
have reset value one (set).
RD
RESET
R
Q
DDAn
C
WD
RESET
R
Q
PORTAn
C
RL
WP
RP
RESET
R
1
Q
D
PORTA2
C
0
WP
RL
OOM01
DISABLE
0
TOGGLE
0
CLEAR
1
RESET
SET
1
R
Q
D
C
TOV0
FOV0
D
D
OOM00
0
1
0
1
1062F–AVR–07/06