ATTINY44A-PU Atmel, ATTINY44A-PU Datasheet - Page 18
![IC MCU AVR 4K FLASH 20MHZ 14PDIP](/photos/7/39/73953/313-14-dip_sml.jpg)
ATTINY44A-PU
Manufacturer Part Number
ATTINY44A-PU
Description
IC MCU AVR 4K FLASH 20MHZ 14PDIP
Manufacturer
Atmel
Series
AVR® ATtinyr
Specifications of ATTINY44A-PU
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
14-DIP (0.300", 7.62mm)
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
Through Hole
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
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
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5.3.6
18
ATtiny24A/44A/84A
Program Examples
The calibrated Oscillator is used to time the EEPROM accesses. Make sure the Oscillator fre-
quency is within the requirements described in
page
The following code examples show one assembly and one C function for erase, write, or atomic
write of the EEPROM. The examples assume that interrupts are controlled (e.g., by disabling
interrupts globally) so that no interrupts will occur during execution of these functions.
Note:
Assembly Code Example
C Code Example
EEPROM_write:
void EEPROM_write(unsigned int ucAddress, unsigned char ucData)
{
}
31.
; Wait for completion of previous write
sbic EECR, EEPE
rjmp EEPROM_write
; Set Programming mode
ldi
out
; Set up address (r18:r17) in address registers
out EEARH, r18
out EEARL, r17
; Write data (r19) to data register
out EEDR, r19
; Write logical one to EEMPE
sbi EECR, EEMPE
; Start eeprom write by setting EEPE
sbi EECR, EEPE
ret
/* Wait for completion of previous write */
while(EECR & (1<<EEPE))
/* Set Programming mode */
EECR = (0<<EEPM1)|(0<<EEPM0)
/* Set up address and data registers */
EEAR = ucAddress;
EEDR = ucData;
/* Write logical one to EEMPE */
EECR |= (1<<EEMPE);
/* Start eeprom write by setting EEPE */
EECR |= (1<<EEPE);
See
;
“Code Examples” on page
r16, (0<<EEPM1)|(0<<EEPM0)
EECR, r16
6.
“OSCCAL – Oscillator Calibration Register” on
8183C–AVR–03/11
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