ATTINY44-20SSU Atmel, ATTINY44-20SSU Datasheet - Page 178

• Manufacturer Part Number: ATTINY44-20SSU
• Description: IC MCU AVR 4K FLASH 20MHZ 14SOIC
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY44-20SSU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: USI
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 12
• Program Memory Size: 4KB (2K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 14-SOIC (3.9mm Width), 14-SOL
• Cpu Family: ATtiny
• Device Core: AVR
• Device Core Size: 8b
• Frequency (max): 20MHz
• Interface Type: SPI/USI
• Total Internal Ram Size: 256Byte
• # I/os (max): 12
• Number Of Timers - General Purpose: 2
• Operating Supply Voltage (typ): 3.3/5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 2.7V
• On-chip Adc: 8-chx10-bit
• Instruction Set Architecture: RISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 14
• Package Type: SOIC
• For Use With: ATAVRISP2 - PROGRAMMER AVR IN SYSTEM
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

20.5.1
20.5.2
178
ATtiny24/44/84
Standard Power-On Reset
Enhanced Power-On Reset
Two versions of power-on reset have been implemented, as follows.
This implementation of power-on reset existed in early versions of ATtiny24/44/84. The table
below describes the characteristics of this power-on reset and it is valid for the following devices,
only:
Note:
Table 20-5.
Notes:
This implementation of power-on reset exists in newer versions of ATtiny24/44/84. The table
below describes the characteristics of this power-on reset and it is valid for the following devices,
only:
Table 20-6.
Notes:
• ATtiny24, revision D, and older
• ATtiny44, revision C, and older
• ATtiny84, revision A
• ATtiny24, revision E, and newer
• ATtiny44, revision D, and newer
• ATtiny84, revision B, and newer
Symbol
Symbol
SR
SR
V
V
V
V
POR
POR
POA
POA
ON
ON
Revisions are marked on the package (packages 14P3 and 14S1: bottom, package 20M1: top)
1. Values are guidelines only.
2. Threshold where device is released from reset when voltage is rising.
3. The power-on reset will not work unless the supply voltage has been below V
1. Values are guidelines only.
2. Threshold where device is released from reset when voltage is rising.
3. The Power-on Reset will not work unless the supply voltage has been below V
Parameter
Release threshold of power-on reset
Activation threshold of power-on reset
Power-on slope rate
Parameter
Release threshold of power-on reset
Activation threshold of power-on reset
Power-On Slope Rate
Characteristics of Standard Power-On Reset. T
Characteristics of Enhanced Power-On Reset.
(2)
(2)
(3)
(3)
Min
Min
0.05
0.01
0.01
T
A
0.7
1.1
0.6
A
= -40 to +85°C
(1)
= -40 to +85°C
(1)
Typ
Typ
1.0
0.9
1.4
1.3
(1)
(1)
Max
Max
1.4
1.3
4.5
POA
1.6
1.6
POA
8006K–AVR–10/10
(1)
(1)
.
.
Units
Units
V/ms
V/ms
V
V
V
V