ATTINY85-20SU Atmel, ATTINY85-20SU Datasheet - Page 88

IC AVR MCU 8K 20MHZ 8SOIC

ATTINY85-20SU

Manufacturer Part Number
ATTINY85-20SU
Description
IC AVR MCU 8K 20MHZ 8SOIC
Manufacturer
Atmel
Series
AVR® ATtinyr
Datasheets

Specifications of ATTINY85-20SU

Core Processor
AVR
Core Size
8-Bit
Speed
20MHz
Connectivity
USI
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
6
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 4x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
8-SOIC (5.3mm Width), 8-SOP, 8-SOEIAJ
Processor Series
ATTINY8x
Core
AVR8
Data Bus Width
8 bit
Data Ram Size
512 B
Interface Type
USI
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
6
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
4-ch x 10-bit
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 SPIATAVRDRAGON - KIT DRAGON 32KB FLASH MEM AVRATAVRISP2 - PROGRAMMER AVR IN SYSTEM
Lead Free Status / RoHS Status
Lead free / RoHS Compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ATTINY85-20SU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
88
ATtiny25/45/85
Figure 12-3. Timer/Counter1 Block Diagram
Three status flags (overflow and compare matches) are found in the Timer/Counter Interrupt
Flag Register - TIFR. Control signals are found in the Timer/Counter Control Registers TCCR1
and GTCCR. The interrupt enable/disable settings are found in the Timer/Counter Interrupt
Mask Register - TIMSK.
The Timer/Counter1 contains three Output Compare Registers, OCR1A, OCR1B, and OCR1C
as the data source to be compared with the Timer/Counter1 contents. In normal mode the Out-
put Compare functions are operational with all three output compare registers. OCR1A
determines action on the OC1A pin (PB1), and it can generate Timer1 OC1A interrupt in normal
mode and in PWM mode. Likewise, OCR1B determines action on the OC1B pin (PB4) and it can
generate Timer1 OC1B interrupt in normal mode and in PWM mode. OCR1C holds the
Timer/Counter maximum value, i.e. the clear on compare match value. In the normal mode an
overflow interrupt (TOV1) is generated when Timer/Counter1 counts from $FF to $00, while in
the PWM mode the overflow interrupt is generated when Timer/Counter1 counts either from $FF
to $00 or from OCR1C to $00. The inverted PWM outputs OC1A and OC1B are not connected in
normal mode.
In PWM mode, OCR1A and OCR1B provide the data values against which the Timer Counter
value is compared. Upon compare match the PWM outputs (OC1A, OC1A, OC1B, OC1B) are
generated. In PWM mode, the Timer Counter counts up to the value specified in the output com-
pare register OCR1C and starts again from $00. This feature allows limiting the counter “full”
value to a specified value, lower than $FF. Together with the many prescaler options, flexible
PWM frequency selection is provided.
8-BIT DATABUS
COMPARE REGISTER
TIMER/COUNTER1
8-BIT COMPARATOR
REGISTER (TIMSK)
TIMER/COUNTER1
TIMER INT. MASK
T/C1 OUTPUT
T/C1 OVER-
FLOW IRQ
(OCR1A)
(TCNT1)
T/C1 COMPARE
MATCH A IRQ
T/C CLEAR
REGISTER (TIFR)
TIMER INT. FLAG
T/C1 COMPARE
MATCH B IRQ
COMPARE REGISTER
8-BIT COMPARATOR
T/C1 OUTPUT
(OCR1B)
Table 12-3 on page 91
DEAD TIME GENERATOR
OC1A
(PB1)
REGISTER 1 (TCCR1)
T/C1 CONTROL
T/C CONTROL
LOGIC
OC1A
(PB0)
lists clock selection and OCR1C
COMPARE REGISTER
OC1B
(PB4)
DEAD TIME GENERATOR
8-BIT COMPARATOR
T/C1 OUTPUT
(OCR1C)
GLOBAL T/C CONTROL
REGISTER (GTCCR)
OC1B
(PB3)
2586M–AVR–07/10
CK
PCK

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