ATTINY261-20MU Atmel, ATTINY261-20MU Datasheet - Page 9
![IC MCU AVR 2K FLASH 20MHZ 32-QFN](/photos/12/13/121309/313-32-qfn_sml.jpg)
ATTINY261-20MU
Manufacturer Part Number
ATTINY261-20MU
Description
IC MCU AVR 2K FLASH 20MHZ 32-QFN
Manufacturer
Atmel
Series
AVR® ATtinyr
Specifications of ATTINY261-20MU
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
2KB (1K x 16)
Program Memory Type
FLASH
Eeprom Size
128 x 8
Ram Size
128 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
ATTINY2x
Core
AVR8
Data Bus Width
8 bit
Data Ram Size
128 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
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/JTAGATSTK505 - ADAPTER KIT FOR 14PIN AVR MCU
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ATTINY261-20MU
Manufacturer:
AVNET
Quantity:
20 000
- Current page: 9 of 242
- Download datasheet (5Mb)
4.3.1
2588E–AVR–08/10
SREG – AVR Status Register
The Status Register is neither automatically stored when entering an interrupt routine, nor
restored when returning from an interrupt. This must be handled by software.
• Bit 7 – I: Global Interrupt Enable
The Global Interrupt Enable bit must be set for the interrupts to be enabled. The individual inter-
rupt enable control is then performed in separate control registers. If the Global Interrupt Enable
Register is cleared, none of the interrupts are enabled independent of the individual interrupt
enable settings. The I-bit is cleared by hardware after an interrupt has occurred, and is set by
the RETI instruction to enable subsequent interrupts. The I-bit can also be set and cleared by
the application with the SEI and CLI instructions, as described in the instruction set reference.
• Bit 6 – T: Bit Copy Storage
The Bit Copy instructions BLD (Bit LoaD) and BST (Bit STore) use the T-bit as source or desti-
nation for the operated bit. A bit from a register in the Register File can be copied into T by the
BST instruction, and a bit in T can be copied into a bit in a register in the Register File by the
BLD instruction.
• Bit 5 – H: Half Carry Flag
The Half Carry Flag H indicates a Half Carry in some arithmetic operations. Half Carry is useful
in BCD arithmetic. See the “Instruction Set Description” for detailed information.
• Bit 4 – S: Sign Bit, S = N
The S-bit is always an exclusive or between the Negative Flag N and the Two’s Complement
Overflow Flag V. See the “Instruction Set Description” for detailed information.
• Bit 3 – V: Two’s Complement Overflow Flag
The Two’s Complement Overflow Flag V supports two’s complement arithmetics. See the
“Instruction Set Description” for detailed information.
• Bit 2 – N: Negative Flag
The Negative Flag N indicates a negative result in an arithmetic or logic operation. See the
“Instruction Set Description” for detailed information.
• Bit 1 – Z: Zero Flag
The Zero Flag Z indicates a zero result in an arithmetic or logic operation. See the “Instruction
Set Description” for detailed information.
• Bit 0 – C: Carry Flag
The Carry Flag C indicates a carry in an arithmetic or logic operation. See the “Instruction Set
Description” for detailed information.
Bit
0x3F (0x5F)
Read/Write
Initial Value
R/W
7
0
I
R/W
6
T
0
⊕
V
R/W
H
5
0
R/W
S
4
0
R/W
3
V
0
R/W
N
2
0
R/W
1
Z
0
R/W
C
0
0
SREG
9
Related parts for ATTINY261-20MU
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![ATtiny261](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
Manufacturer:
Atmel Corporation
Datasheet:
![ATtiny261 Automotive](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
Manufacturer:
Atmel Corporation
Datasheet:
![ATTINY261-20PU](/photos/6/80/68043/313-20-dip_tmb.jpg)
Part Number:
Description:
IC MCU AVR 2K FLASH 20MHZ 20-DIP
Manufacturer:
Atmel
Datasheet:
![ATTINY261-15MZ](/images/manufacturer_photos/0/0/78/atmel_tmb.jpg)
Part Number:
Description:
MCU AVR 2K FLASH 15MHZ 32-QFN
Manufacturer:
Atmel
Datasheet:
![ATTINY261-15MAZ](/images/manufacturer_photos/0/0/78/atmel_tmb.jpg)
Part Number:
Description:
MCU AVR 2KB FLASH 15MHZ 32-VQFN
Manufacturer:
Atmel
Datasheet:
![ATTINY261-20SU](/photos/6/80/68042/453-20-soic_tmb.jpg)
Part Number:
Description:
IC MCU AVR 2K FLASH 20MHZ 20SOIC
Manufacturer:
Atmel
Datasheet:
![attiny261-20su-20s2](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
Attiny261 8-bit Microcontroller With 2/4/8k Bytes In-system Programmable Flash
Manufacturer:
ATMEL Corporation
Datasheet:
![ATTINY261-20SUR](/photos/6/80/68042/453-20-soic_tmb.jpg)
Part Number:
Description:
IC MCU AVR 2K FLASH 20MHZ 20SOIC
Manufacturer:
Atmel
Datasheet:
![ATTINY261-20MUR](/photos/12/13/121309/313-32-qfn_tmb.jpg)
Part Number:
Description:
IC MCU AVR 2K FLASH 20MHZ 32QFN
Manufacturer:
Atmel
Datasheet:
![ATtiny26](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
Manufacturer:
Atmel Corporation
Datasheet: