ATTINY461-20SU Atmel, ATTINY461-20SU Datasheet - Page 134
![IC MCU AVR 4K FLASH 20MHZ 20SOIC](/photos/6/80/68042/453-20-soic_sml.jpg)
ATTINY461-20SU
Manufacturer Part Number
ATTINY461-20SU
Description
IC MCU AVR 4K FLASH 20MHZ 20SOIC
Manufacturer
Atmel
Series
AVR® ATtinyr
Datasheet
1.ATAVRMC321.pdf
(242 pages)
Specifications of ATTINY461-20SU
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
4KB (2K x 16)
Program Memory Type
FLASH
Eeprom Size
256 x 8
Ram Size
256 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
ATTINY4x
Core
AVR8
Data Bus Width
8 bit
Data Ram Size
256 B
Interface Type
2-Wire, SPI, USI
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
16
Number Of Timers
2
Operating Supply Voltage
2.7 V to 5.5 V
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, 16 Channel
Package
20SOIC
Device Core
AVR
Family Name
ATtiny
Maximum Speed
20 MHz
For Use With
ATSTK600-DIP40 - STK600 SOCKET/ADAPTER 40-PDIPATAVRBC100 - REF DESIGN KIT BATTERY CHARGER770-1007 - ISP 4PORT ATMEL AVR MCU SPI/JTAG770-1004 - ISP 4PORT FOR ATMEL AVR MCU SPI
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATTINY461-20SU
Manufacturer:
ATMEL
Quantity:
3 282
- Current page: 134 of 242
- Download datasheet (5Mb)
13.5.4
134
ATtiny261/461/861
USICR – USI Control Register
The 4-bit counter increments by one for each clock generated either by the external clock edge
detector, by a Timer/Counter0 Compare Match, or by software using USICLK or USITC strobe
bits. The clock source depends of the setting of the USICS1:0 bits. For external clock operation
a special feature is added that allows the clock to be generated by writing to the USITC strobe
bit. This feature is enabled by write a one to the USICLK bit while setting an external clock
source (USICS1 = 1).
Note that even when no wire mode is selected (USIWM1:0 = 0) the external clock input
(USCK/SCL) are can still be used by the counter.
The Control Register includes interrupt enable control, wire mode setting, Clock Select setting,
and clock strobe.
• Bit 7 – USISIE: Start Condition Interrupt Enable
Setting this bit to one enables the Start Condition detector interrupt. If there is a pending inter-
rupt when the USISIE and the Global Interrupt Enable Flag is set to one, this will immediately be
executed. Refer to the USISIF bit description on page 133 for further details.
• Bit 6 – USIOIE: Counter Overflow Interrupt Enable
Setting this bit to one enables the Counter Overflow interrupt. If there is a pending interrupt when
the USIOIE and the Global Interrupt Enable Flag is set to one, this will immediately be executed.
Refer to the USIOIF bit description on page 133 for further details.
• Bits 5:4 – USIWM1:0: Wire Mode
These bits set the type of wire mode to be used, as shown in
Basically, only the function of the outputs are affected by these bits. Data and clock inputs are
not affected by the mode selected and will always have the same function. The counter and USI
Data Register can therefore be clocked externally, and data input sampled, even when outputs
are disabled.
Table 13-1.
Bit
0x0D (0x2D)
Read/Write
Initial Value
USIWM1
0
0
USIWM0
7
USISIE
R/W
0
Relationship between USIWM1:0 and USI Operation
0
1
6
USIOIE
R/W
0
Description
Outputs, clock hold, and start detector disabled.
Port pins operate as normal.
Three-wire mode. Uses DO, DI, and USCK pins.
The Data Output (DO) pin overrides the corresponding bit in the PORTA
register. However, the corresponding DDRA bit still controls the data direction.
When the port pin is set as input the pin pull-up is controlled by the PORTA bit.
The Data Input (DI) and Serial Clock (USCK) pins do not affect the normal port
operation. When operating as master, clock pulses are software generated by
toggling the PORTA register, while the data direction is set to output. The
USITC bit in the USICR Register can be used for this purpose.
5
USIWM1
R/W
0
4
USIWM0
R/W
0
3
USICS1
R/W
0
Table 13-1 on page
2
USICS0
R/W
0
1
USICLK
W
0
0
USITC
W
0
134.
2588E–AVR–08/10
USICR
Related parts for ATTINY461-20SU
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
![ATtiny461](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
Manufacturer:
Atmel Corporation
Datasheet:
![ATtiny461 Automotive](/images/manufacturer_photos/0/0/79/atmel_corporation_tmb.jpg)
Part Number:
Description:
Manufacturer:
Atmel Corporation
Datasheet:
![ATTINY461-20MU](/photos/12/13/121309/313-32-qfn_tmb.jpg)
Part Number:
Description:
IC AVR MCU 4K 20MHZ 32-QFN
Manufacturer:
Atmel
Datasheet:
![ATTINY461-15MZ](/images/manufacturer_photos/0/0/78/atmel_tmb.jpg)
Part Number:
Description:
MCU AVR 4K FLASH 15MHZ 32-QFN
Manufacturer:
Atmel
Datasheet:
![ATTINY461-15MAZ](/images/manufacturer_photos/0/0/78/atmel_tmb.jpg)
Part Number:
Description:
MCU AVR 4KB FLASH 15MHZ 32-VQFN
Manufacturer:
Atmel
Datasheet:
![ATTINY461-20SUR](/images/manufacturer_photos/0/0/78/atmel_tmb.jpg)
Part Number:
Description:
MCU AVR 4KB FLASH 20MHZ 20SOIC
Manufacturer:
Atmel
Datasheet:
![ATTINY461-20MUR](/images/manufacturer_photos/0/0/78/atmel_tmb.jpg)
Part Number:
Description:
IC MCU AVR 4K 20MHZ 32QFN
Manufacturer:
Atmel
Datasheet:
![ATTINY461-20PU](/photos/16/13/161304/pdip20_tmb.jpg)
Part Number:
Description:
Microcontrollers (MCU) 4kB Flash 0.256kB EEPROM 16 I/O Pins
Manufacturer:
Atmel
Datasheet:
![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: