ATTINY28L-4AI Atmel, ATTINY28L-4AI Datasheet - Page 26

• Manufacturer Part Number: ATTINY28L-4AI
• Description: IC AVR MCU 2KFLSH 4MHZ 3V 32TQFP
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY28L-4AI

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 4MHz
• Peripherals: POR, WDT
• Number Of I /o: 11
• Program Memory Size: 2KB (1K x 16)
• Program Memory Type: FLASH
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 32-TQFP, 32-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Ram Size: -
• Data Converters: -
• Connectivity: -

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