ATtiny28L Atmel Corporation, ATtiny28L Datasheet - Page 26

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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

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Port A Schematics
26
ATtiny28L/V
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)
Figure 22. Port A Schematic Diagram (Pin PA2)
PAn
PA2
WP:
Note: Both the flip-flops shown
have reset value one (set).
RL:
WRITE PORTA
READ PORTA LATCH
PULL-
MOS
UP
WP:
WD:
RP:
RD:
RL:
n:
WRITE PORTA
WRITE DDRA
READ PORTA LATCH
READ PORTA PIN
READ DDRA
0,1,3
MODULATOR
HARDWARE
Q
RESET
R
C
D
1
0
Q
RESET
R
C
D
RL
RP
RL
Q
PORTA2
RESET
WP
R
C
DISABLE
TOGGLE
CLEAR
D
SET
Q
Q
PORTAn
RESET
RESET
DDAn
OOM01
WD
WP
RD
C
R
R
C
TOV0
FOV0
0
0
1
1
D
D
1062F–AVR–07/06
OOM00
0
1
0
1

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