ATTINY261-20SU Atmel, ATTINY261-20SU Datasheet - Page 27
![IC MCU AVR 2K FLASH 20MHZ 20SOIC](/photos/6/80/68042/453-20-soic_sml.jpg)
ATTINY261-20SU
Manufacturer Part Number
ATTINY261-20SU
Description
IC MCU AVR 2K FLASH 20MHZ 20SOIC
Manufacturer
Atmel
Series
AVR® ATtinyr
Specifications of ATTINY261-20SU
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
20-SOIC (7.5mm Width)
Processor Series
ATTINY2x
Core
AVR8
Data Bus Width
8 bit
Data Ram Size
128 B
Interface Type
SPI, USI
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
16
Number Of Timers
3
Operating Supply Voltage
2.7 V to 5.5 V
Maximum Operating Temperature
+ 125 C
Mounting Style
SMD/SMT
3rd Party Development Tools
EWAVR, EWAVR-BL
Development Tools By Supplier
ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT
Minimum Operating Temperature
- 55 C
On-chip Adc
10 bit, 11 Channel
For Use With
ATSTK600 - DEV KIT FOR AVR/AVR32ATAVRBC100 - REF DESIGN KIT BATTERY CHARGER770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAG770-1004 - ISP 4PORT FOR ATMEL AVR MCU SPIATSTK505 - 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:
ATTINY261-20SU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
- Current page: 27 of 242
- Download datasheet (5Mb)
2588E–AVR–08/10
The fast peripheral clock, clk
prescaled version of the PLL output, clk
a detailed illustration on the PLL clock system.
Figure 6-3.
The internal PLL is enabled when CKSEL fuse bits are programmed to ‘0001’and the PLLE bit of
PLLCSR is set. The internal oscillator and the PLL are switched off in power down and stand-by
sleep modes.
When the LSM bit of PLLCSR is set, the PLL switches from using the output of the internal 8
MHz oscillator to using the output divided by two. The frequency of the fast peripheral clock is
effectively divided by two, resulting in a clock frequency of 32 MHz. The LSM bit can not be set if
PLL
Since the PLL is locked to the output of the internal 8 MHz oscillator, adjusting the oscillator fre-
quency via the OSCCAL register also changes the frequency of the fast peripheral clock. It is
possible to adjust the frequency of the internal oscillator to well above 8 MHz but the fast periph-
eral clock will saturate and remain oscillating at about 85 MHz. In this case the PLL is no longer
locked to the internal oscillator clock signal. Therefore, in order to keep the PLL in the correct
operating range, it is recommended to program the OSCCAL registers such that the oscillator
frequency does not exceed 8 MHz.
The PLOCK bit in PLLCSR is set when PLL is locked.
Programming CKSEL fuse bits to ‘0001’, the PLL output divided by four will be used as a system
clock, as shown in
Table 6-4.
XTAL1
XTAL2
CLK
is used as a system clock.
OSCCAL
OSCILLATORS
OSCILLATOR
8 MHz
CKSEL3:0
PCK Clocking System
PLLCK Operating Modes
0001
Table
LSM
6-4.
1/2
PCK
4 MHz
8 MHz
, can be selected as the clock source for Timer/Counter1 and a
PLL
, can be selected as system clock. See
PLLE
PLL
8x
64 / 32 MHz
Nominal Frequency
DETECTOR
1/4
LOCK
16 MHz
16 MHz
8 MHz
CKSEL3:0
PRESCALER
CLKPS3:0
Figure 6-3
PLOCK
clk
clk
PCK
PLL
for
27
Related parts for ATTINY261-20SU
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:
![ATTINY261-20MU](/photos/12/13/121309/313-32-qfn_tmb.jpg)
Part Number:
Description:
IC MCU AVR 2K FLASH 20MHZ 32-QFN
Manufacturer:
Atmel
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-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: