ATTINY28L-4PI Atmel, ATTINY28L-4PI Datasheet - Page 3

• Manufacturer Part Number: ATTINY28L-4PI
• Description: IC MCU 2K FLASH 4MHZ LV IT 28DIP
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY28L-4PI

• 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: 28-DIP (0.300", 7.62mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Ram Size: -
• Data Converters: -
• Connectivity: -

Pin Descriptions
VCC
GND
Port A (PA3..PA0)
Port B (PB7..PB0)
Port D (PD7..PD0)
XTAL1
XTAL2
RESET
1062FS–AVR–07/06
rupt on low-level input feature enables the ATtiny28 to be highly responsive to external
events, still featuring the lowest power consumption while in the power-down modes.
The device is manufactured using Atmel’s high-density, nonvolatile memory technology.
By combining an enhanced RISC 8-bit CPU with Flash on a monolithic chip, the Atmel
ATtiny28 is a powerful microcontroller that provides a highly flexible and cost-effective
solution to many embedded control applications. The ATtiny28 AVR is supported with a
full suite of program and system development tools including: macro assemblers, pro-
gram debugger/simulators, in-circuit emulators and evaluation kits.
Supply voltage pin.
Ground pin.
Port A is a 4-bit I/O port. PA2 is output-only and can be used as a high-current LED
driver. At V
bi-directional I/O pins with internal pull-ups (selected for each bit). The port pins are tri-
stated when a reset condition becomes active, even if the clock is not running.
Port B is an 8-bit input port with internal pull-ups (selected for all Port B pins). Port B
pins that are externally pulled low will source current if the pull-ups are activated.
Port B also serves the functions of various special features of the ATtiny28 as listed on
page 27. If any of the special features are enabled, the pull-up(s) on the corresponding
pin(s) is automatically disabled. The port pins are tri-stated when a reset condition
becomes active, even if the clock is not running.
Port D is an 8-bit I/O port. Port pins can provide internal pull-up resistors (selected for
each bit). The port pins are tri-stated when a reset condition becomes active, even if the
clock is not running.
Input to the inverting oscillator amplifier and input to the internal clock operating circuit.
Output from the inverting oscillator amplifier.
Reset input. An external reset is generated by a low level on the RESET pin. Reset
pulses longer than 50 ns will generate a reset, even if the clock is not running. Shorter
pulses are not guaranteed to generate a reset.
CC
= 2.0V, the PA2 output buffer can sink 25 mA. PA3, PA1 and PA0 are
ATtiny28L/V
3