ATTINY861-20MU Atmel, ATTINY861-20MU Datasheet - Page 19
![IC MCU AVR 8K FLASH 20MHZ 32-QFN](/photos/12/32/123217/attiny861-20mu_sml.jpg)
ATTINY861-20MU
Manufacturer Part Number
ATTINY861-20MU
Description
IC MCU AVR 8K FLASH 20MHZ 32-QFN
Manufacturer
Atmel
Series
AVR® ATtinyr
Specifications of ATTINY861-20MU
Core Processor
AVR
Core Size
8-Bit
Speed
20MHz
Connectivity
USI
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
16
Program Memory Size
8KB (4K x 16)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
512 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 5.5 V
Data Converters
A/D 11x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
32-VQFN Exposed Pad, 32-HVQFN, 32-SQFN, 32-DHVQFN
Processor Series
ATTINY8x
Core
AVR8
Data Bus Width
8 bit
Data Ram Size
512 B
Interface Type
2-Wire, SPI, USI
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
16
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, ATAVRMC320
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 11 Channel
Package
32MLF EP
Device Core
AVR
Family Name
ATtiny
Maximum Speed
20 MHz
Operating Supply Voltage
3.3|5 V
For Use With
ATSTK600 - DEV KIT FOR AVR/AVR32ATAVRBC100 - REF DESIGN KIT BATTERY CHARGER770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAG
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATTINY861-20MU
Manufacturer:
LT
Quantity:
2 140
Part Number:
ATTINY861-20MU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
- Current page: 19 of 242
- Download datasheet (5Mb)
5.3.7
2588E–AVR–08/10
Preventing EEPROM Corruption
The next code examples show assembly and C functions for reading the EEPROM. The exam-
ples assume that interrupts are controlled so that no interrupts will occur during execution of
these functions.
Note:
During periods of low V
too low for the CPU and the EEPROM to operate properly. These issues are the same as for
board level systems using EEPROM, and the same design solutions should be applied.
An EEPROM data corruption can be caused by two situations when the voltage is too low. First,
a regular write sequence to the EEPROM requires a minimum voltage to operate correctly. Sec-
ondly, the CPU itself can execute instructions incorrectly, if the supply voltage is too low.
EEPROM data corruption can easily be avoided by following this design recommendation:
Keep the AVR RESET active (low) during periods of insufficient power supply voltage. This can
be done by enabling the internal Brown-out Detector (BOD). If the detection level of the internal
BOD does not match the needed detection level, an external low V
Assembly Code Example
C Code Example
EEPROM_read:
unsigned char EEPROM_read(unsigned char ucAddress)
{
}
; Wait for completion of previous write
sbic EECR,EEPE
rjmp EEPROM_read
; Set up address (r18:r17) in address register
out EEARH, r18
out EEARL, r17
; Start eeprom read by writing EERE
sbi EECR,EERE
; Read data from data register
in
ret
/* Wait for completion of previous write */
while(EECR & (1<<EEPE))
/* Set up address register */
EEAR = ucAddress;
/* Start eeprom read by writing EERE */
EECR |= (1<<EERE);
/* Return data from data register */
return EEDR;
See
;
“Code Examples” on page
r16,EEDR
CC
, the EEPROM data can be corrupted because the supply voltage is
6.
CC
reset protection circuit can
19
Related parts for ATTINY861-20MU
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![ATtiny861](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
Manufacturer:
Atmel Corporation
Datasheet:
![ATtiny861 Automotive](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
Manufacturer:
Atmel Corporation
Datasheet:
![ATTINY861-20SU](/photos/6/80/68042/453-20-soic_tmb.jpg)
Part Number:
Description:
IC MCU AVR 8K FLASH 20MHZ 20SOIC
Manufacturer:
Atmel
Datasheet:
![ATTINY861-15MZ](/photos/30/99/309943/qfn-32_tmb.jpg)
Part Number:
Description:
MCU AVR 8K FLASH 15MHZ 32-QFN
Manufacturer:
Atmel
Datasheet:
![ATTINY861-15SZ](/photos/6/80/68042/453-20-soic_tmb.jpg)
Part Number:
Description:
MCU AVR 8K FLASH 15MHZ 20-SOIC
Manufacturer:
Atmel
Datasheet:
![ATTINY861-15MAZ](/images/manufacturer_photos/0/0/78/atmel_tmb.jpg)
Part Number:
Description:
MCU AVR 8KB FLASH 15MHZ 32-VQFN
Manufacturer:
Atmel
Datasheet:
![ATTINY861-20PU](/photos/16/13/161304/pdip20_tmb.jpg)
Part Number:
Description:
Microcontrollers (MCU) 8kB Flash 0.512kB EEPROM 16 I/O Pins
Manufacturer:
Atmel
Datasheet:
![ATTINY861-20SUR](/images/manufacturer_photos/0/0/78/atmel_tmb.jpg)
Part Number:
Description:
8-bit Microcontrollers - MCU 8KB FL 512B EE 512B SRAM 20MHZ IND 5V
Manufacturer:
Atmel
![ATTINY261A-SU](/images/manufacturer_photos/0/0/78/atmel_tmb.jpg)
Part Number:
Description:
IC, MCU, 8BIT, 2K FLASH, 20SOIC
Manufacturer:
Atmel
Datasheet:
![ATTINY261A-PU](/photos/19/6/190670/ge20pdip05-40_tmb.jpg)
Part Number:
Description:
IC, MCU, 8BIT, 2K FLASH, 20PDIP
Manufacturer:
Atmel
Datasheet: