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
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

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