ATTINY45-20SUR Atmel, ATTINY45-20SUR Datasheet - Page 99
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ATTINY45-20SUR
Manufacturer Part Number
ATTINY45-20SUR
Description
MCU AVR 4KB FLASH 20MHZ 8SOIC
Manufacturer
Atmel
Series
AVR® ATtinyr
Specifications of ATTINY45-20SUR
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
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 4x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
ATTINY45-20SU SL383
ATTINY45-20SU SL383
ATTINY45-20SU-SL383
Q4272203
ATTINY45-20SU SL383
ATTINY45-20SU-SL383
Q4272203
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2586M–AVR–07/10
101
this unit useful for lower speed functions or exact timing functions with infrequent actions.
Figure 13-2. Timer/Counter 1 Synchronization Register Block Diagram.
Timer/Counter1 and the prescaler allow running the CPU from any clock source while the pres-
caler is operating on the fast 25.6 MHz PCK clock in the asynchronous mode.
The following
PCKE
CK
PCK
SYNC
MODE
ASYNC
MODE
for a detailed description on this function. Similarly, the high prescaling opportunities make
IO-registers
OCR1C
OCF1A
OCR1A
TCCR1
GTCCR
TCNT1
TOV1
Figure 13-3
1..2 PCK Delay
1..2 PCK Delay
shows the block diagram for Timer/Counter1.
S
A
Input synchronization
registers
OCR1A_SI
OCR1C_SI
TCCR1_SI
GTCCR_SI
TCNT1_SI
OCF1A_SI
TOV1_SI
1 PCK Delay
1PCK Delay
S
A
8-BIT DATABUS
Timer/Counter1
TCNT1
~1 CK Delay
~1 CK Delay
Output synchronization
registers
TCNT_SO
OCF1A_SO
TOV1_SO
No Delay
No Delay
TCNT1
OCF1A
TOV1
99
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