ATTINY44A-MU Atmel, ATTINY44A-MU Datasheet - Page 161

• Manufacturer Part Number: ATTINY44A-MU
• Description: IC MCU AVR 4K FLASH 20MHZ 20QFN
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY44A-MU

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 20MHz
• Connectivity: USI
• Peripherals: Brown-out Detect/Reset, POR, PWM, Temp Sensor, 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): 1.8 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 20-MLF®, QFN
• Processor Series: ATTINY4x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: SPI/USI
• Maximum Clock Frequency: 20 MHz
• Number Of Programmable I/os: 12
• Number Of Timers: 2
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 20-ch x 10-bit
• Data Rom Size: 256 B
• A/d Bit Size: 10 bit
• A/d Channels Available: 20
• Height: 0.74 mm
• Length: 4 mm
• Supply Voltage (max): 5.5 V
• Supply Voltage (min): 1.8 V
• Width: 4 mm
• For Use With: ATSTK600 - DEV KIT FOR AVR/AVR32770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAGATAVRISP2 - PROGRAMMER AVR IN SYSTEM
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

19.3.1
19.3.2
19.4
8183C–AVR–03/11
Page Size
Signature Bytes
Calibration Byte
All Atmel microcontrollers have a three-byte signature code which identifies the device. This
code can be read in both serial and High-voltage Programming mode, also when the device is
locked.
Signature bytes can also be read by the device firmware. See section
Signature Data from Software” on page
The three signature bytes reside in a separate address space called the device signature imprint
table. The signature data for ATtiny24A/44A/84A is given in
Table 19-7.
The device signature imprint table of ATtiny24A/44A/84A contains one byte of calibration data
for the internal oscillator, as shown in
matically written into the OSCCAL register to ensure correct frequency of the calibrated
oscillator.
Calibration bytes can also be read by the device firmware. See section
Signature Data from Software” on page
Table 19-8.
Table 19-9.
Part
ATtiny24A
ATtiny44A
ATtiny84A
Device
ATtiny24A
ATtiny44A
ATtiny84A
Device
ATtiny24A
ATtiny44A
ATtiny84A
Device Signature Bytes
No. of Words in a Page and No. of Pages in the Flash
1K word
(2K bytes)
2K words
(4K bytes)
4K words
(8K bytes)
No. of Words in a Page and No. of Pages in the EEPROM
Flash Size
EEPROM
128 bytes
256 bytes
512 bytes
Size
Signature Byte 0
Page Size
Page Size
16 words
32 words
32 words
4 bytes
4 bytes
4 bytes
0x1E
0x1E
0x1E
Table 19-6 on page
154.
154.
PCWORD
PCWORD
EEA[1:0]
EEA[1:0]
EEA[1:0]
PC[3:0]
PC[4:0]
PC[4:0]
Signature Byte 1
No. of Pages
No. of Pages
0x91
0x92
0x93
ATtiny24A/44A/84A
160. During reset, this byte is auto-
Table
128
128
64
64
32
64
19-7.
“Reading Lock, Fuse and
“Reading Lock, Fuse and
PCPAGE
PCPAGE
EEA[6:2]
EEA[7:2]
PC[10:5]
PC[11:5]
EEA[8:2]
PC[9:4]
Signature Byte 0
0x0B
0x0C
0x07
EEAMSB
PCMSB
10
11
9
6
7
8
161