ATTINY261-20MU Atmel, ATTINY261-20MU Datasheet - Page 86
![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
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- Download datasheet (5Mb)
11.10.4
11.10.5
11.10.6
11.10.7
86
ATtiny261/461/861
TCNT0H – Timer/Counter0 Register High Byte
OCR0A – Timer/Counter0 Output Compare Register A
OCR0B – Timer/Counter0 Output Compare Register B
TIMSK – Timer/Counter0 Interrupt Mask Register
When 16-bit mode is selected (the TCW0 bit is set to one) the Timer/Counter Register TCNT0H
combined to the Timer/Counter Register TCNT0L gives direct access, both for read and write
operations, to the Timer/Counter unit 16-bit counter. To ensure that both the high and low bytes
are read and written simultaneously when the CPU accesses these registers, the access is per-
formed using an 8-bit temporary high byte register (TEMP). This temporary register is shared by
all the other 16-bit registers. See
The Output Compare Register A contains an 8-bit value that is continuously compared with the
counter value (TCNT0L). A match can be used to generate an Output Compare interrupt.
In 16-bit mode the OCR0A register contains the low byte of the 16-bit Output Compare Register.
To ensure that both the high and the low bytes are written simultaneously when the CPU writes
to these registers, the access is performed using an 8-bit temporary high byte register (TEMP).
This temporary register is shared by all the other 16-bit registers. See
16-bit Mode” on page
The Output Compare Register B contains an 8-bit value that is continuously compared with the
counter value (TCNT0L in 8-bit mode and TCNTH in 16-bit mode). A match can be used to gen-
erate an Output Compare interrupt.
In 16-bit mode the OCR0B register contains the high byte of the 16-bit Output Compare Regis-
ter. To ensure that both the high and the low bytes are written simultaneously when the CPU
writes to these registers, the access is performed using an 8-bit temporary high byte register
(TEMP). This temporary register is shared by all the other 16-bit registers. See
isters in 16-bit Mode” on page
• Bit 4 – OCIE0A: Timer/Counter0 Output Compare Match A Interrupt Enable
When the OCIE0A bit is written to one, and the I-bit in the Status Register is set, the
Timer/Counter0 Compare Match A interrupt is enabled. The corresponding interrupt is executed
Bit
0x14 (0x34)
Read/Write
Initial Value
Bit
0x13 (0x33)
Read/Write
Initial Value
Bit
0x12 (0x32)
Read/Write
Initial Value
Bit
0x39 (0x59)
Read/Write
Initial Value
OCIE1D
R/W
R/W
R/W
R/W
7
0
7
0
7
0
7
0
80.
OCIE1A
R/W
R/W
R/W
R/W
6
0
6
0
6
0
6
0
80.
OCIE1B
“Accessing Registers in 16-bit Mode” on page 80
R/W
R/W
R/W
R/W
5
0
5
0
5
0
5
0
OCIE0A
R/W
R/W
R/W
R/W
4
0
4
0
4
0
4
0
TCNT0H[7:0]
OCR0A[7:0]
OCR0B[7:0]
OCIE0B
R/W
R/W
R/W
R/W
3
0
3
0
3
0
3
0
TOIE1
R/W
R/W
R/W
R/W
2
0
2
0
2
0
2
0
TOIE0
R/W
R/W
R/W
R/W
“Accessing Registers in
1
0
1
0
1
0
1
0
TICIE0
“Accessing Reg-
R/W
R/W
R/W
R
0
0
0
0
0
0
0
0
2588E–AVR–08/10
TCNT0H
OCR0A
OCR0B
TIMSK
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