ATTINY44-20PU Atmel, ATTINY44-20PU Datasheet - Page 183

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

Specifications of ATTINY44-20PU

• 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-DIP (0.300", 7.62mm)
• Package: 14PDIP
• Device Core: AVR
• Family Name: ATtiny
• Maximum Speed: 20 MHz
• Operating Supply Voltage: 3.3|5 V
• Data Bus Width: 8 Bit
• Number Of Programmable I/os: 12
• Interface Type: SPI/USI
• On-chip Adc: 8-chx10-bit
• Number Of Timers: 2
• For Use With: ATAVRISP2 - PROGRAMMER AVR IN SYSTEM
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

20.8
8006K–AVR–10/10
Serial Programming Characteristics
Figure 20-4. Serial Programming Timing
Figure 20-5. Serial Programming Waveform
Table 20-12. Serial Programming Characteristics, T
Note:
SERIAL DATA OUTPUT
SERIAL CLOCK INPUT
Symbol
1/t
1/t
SERIAL DATA INPUT
t
t
t
t
t
t
OVSH
SHOX
CLCL
CLCL
SHSL
SLSH
CLCL
CLCL
1. 2 t
Parameter
Oscillator Frequency (ATtiny24/44/84V)
Oscillator Period (ATtiny24/44/84V)
Oscillator Freq. (ATtiny24/44/84, V
Oscillator Period (ATtiny24/44/84, V
SCK Pulse Width High
SCK Pulse Width Low
MOSI Setup to SCK High
MOSI Hold after SCK High
SAMPLE
MOSI
MISO
CLCL
(MOSI)
(MISO)
(Unless Otherwise Noted)
SCK
(SCK)
for f
ck
< 12 MHz, 3 t
t
OVSH
MSB
MSB
CLCL
for f
t
SHSL
ck
CC
CC
>= 12 MHz
= 4.5V - 5.5V)
= 4.5V - 5.5V)
A
= -40°C to +85°C, V
t
SHOX
2 t
2 t
2 t
t
CLCL
CLCL
Min
250
CLCL
50
CLCL
0
0
ATtiny24/44/84
(1)
(1)
t
SLSH
CC
Typ
= 1.8 - 5.5V
Max
20
4
LSB
LSB
Units
MHz
MHz
ns
ns
ns
ns
ns
ns
183