ATTINY44-15MZ Atmel, ATTINY44-15MZ Datasheet - Page 29
![MCU AVR 4K FLASH 15MHZ 20-QFN](/photos/12/32/123214/20-qfn-pc_sml.jpg)
ATTINY44-15MZ
Manufacturer Part Number
ATTINY44-15MZ
Description
MCU AVR 4K FLASH 15MHZ 20-QFN
Manufacturer
Atmel
Series
AVR® ATtinyr
Datasheet
1.ATTINY44-15MZ.pdf
(225 pages)
Specifications of ATTINY44-15MZ
Package / Case
20-QFN Exposed Pad
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Operating Temperature
-40°C ~ 125°C
Speed
16MHz
Number Of I /o
12
Eeprom Size
256 x 8
Core Processor
AVR
Program Memory Type
FLASH
Ram Size
256 x 8
Program Memory Size
4KB (4K x 8)
Data Converters
A/D 8x10b
Oscillator Type
Internal
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Connectivity
USI
Core Size
8-Bit
Processor Series
ATTINY4x
Core
AVR8
Data Bus Width
8 bit
Data Ram Size
256 B
Interface Type
SPI, UART
Maximum Clock Frequency
16 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
10 bit, 8 Channel
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATTINY44-15MZ
Manufacturer:
ATMEL
Quantity:
1 000
Part Number:
ATTINY44-15MZ
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
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7.6
7.7
7701E–AVR–02/11
Calibrated Internal RC Oscillator
External Clock
By default, the Internal RC Oscillator provides an approximate 8MHz clock. Though voltage
and temperature dependent, this clock can be very accurately calibrated by the user. See
Table 22-2 on page 180
device is shipped with the CKDIV8 Fuse programmed. See
31
This clock may be selected as the system clock by programming the CKSEL Fuses as shown
in
loads the pre-programmed calibration value into the OSCCAL Register and thereby automati-
cally calibrates the RC Oscillator. The accuracy of this calibration is shown as Factory
calibration in
By changing the OSCCAL register from SW, see
on page
tion. The accuracy of this calibration is shown as User calibration in
When this Oscillator is used as the chip clock, the Watchdog Oscillator will still be used for the
Watchdog Timer and for the Reset Time-out. For more information on the pre-programmed
calibration value, see the section
Table 7-6.
Note:
When this Oscillator is selected, start-up times are determined by the SUT Fuses as shown in
Table 7-7 on page
Table 7-7.
Note:
To drive the device from an external clock source, CLKI should be driven as shown in
7-3 on page
grammed to “0000”.
SUT1..0
Table
for more details.
10
00
01
11
(1)
1. The device is shipped with this option selected.
1. The device is shipped with this option selected.
7-6. If selected, it will operate with no external components. During reset, hardware
32, it is possible to get higher calibration accuracy than by using the factory calibra-
Table 22-2 on page
CKSEL3..0
30. To run the device on an external clock, the CKSEL Fuses must be pro-
Internal Calibrated RC Oscillator Operating Modes
Start-up Times for the Internal Calibrated RC Oscillator Clock Selection
0010
from Power-down
29..
(1)
Start-up Time
6 CK
6 CK
6 CK
and
Atmel ATtiny24/44/84 [Preliminary]
“Internal Oscillator Speed” on page 204
“Calibration Byte” on page
180.
Additional Delay from
Reset (V
Reserved
14CK + 64 ms
14CK + 4 ms
“Oscillator Calibration Register – OSCCAL”
14CK
CC
Nominal Frequency
= 5.0V)
“System Clock Prescaler” on page
165.
8.0 MHz
Table 22-2 on page
Recommended Usage
BOD enabled
Fast rising power
Slowly rising power
for more details. The
Figure
180.
29
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