ATTINY2313A-SU Atmel, ATTINY2313A-SU Datasheet - Page 79
![IC MCU AVR 2K FLASH 20MHZ 20SOIC](/photos/6/80/68042/453-20-soic_sml.jpg)
ATTINY2313A-SU
Manufacturer Part Number
ATTINY2313A-SU
Description
IC MCU AVR 2K FLASH 20MHZ 20SOIC
Manufacturer
Atmel
Series
AVR® ATtinyr
Specifications of ATTINY2313A-SU
Core Processor
AVR
Core Size
8-Bit
Speed
20MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
18
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)
1.8 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
20-SOIC (7.5mm Width)
Controller Family/series
ATtiny
No. Of I/o's
18
Eeprom Memory Size
128Byte
Ram Memory Size
128Byte
Cpu Speed
20MHz
Rohs Compliant
Yes
Processor Series
ATTINY2x
Core
AVR8
Data Bus Width
8 bit
Data Ram Size
128 B
Interface Type
SPI, USART
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
18
Operating Supply Voltage
1.8 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
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Data Converters
-
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
ATTINY2313A-SU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
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11.8
8246A–AVR–11/09
Timer/Counter Timing Diagrams
one allows the OC0A pin to toggle on Compare Matches if the WGM02 bit is set. This option is
not available for the OC0B pin (See
visible on the port pin if the data direction for the port pin is set as output. The PWM waveform is
generated by clearing (or setting) the OC0x Register at the Compare Match between OCR0x
and TCNT0 when the counter increments, and setting (or clearing) the OC0x Register at Com-
pare Match between OCR0x and TCNT0 when the counter decrements. The PWM frequency for
the output when using phase correct PWM can be calculated by the following equation:
The N variable represents the prescale factor (1, 8, 64, 256, or 1024).
The extreme values for the OCR0A Register represent special cases when generating a PWM
waveform output in the phase correct PWM mode. If the OCR0A is set equal to BOTTOM, the
output will be continuously low and if set equal to MAX the output will be continuously high for
non-inverted PWM mode. For inverted PWM the output will have the opposite logic values.
At the very start of period 2 in
even though there is no Compare Match. The point of this transition is to guarantee symmetry
around BOTTOM. There are two cases that give a transition without Compare Match.
The Timer/Counter is a synchronous design and the timer clock (clk
clock enable signal in the following figures. The figures include information on when Interrupt
Flags are set.
shows the count sequence close to the MAX value in all modes other than phase correct PWM
mode.
Figure 11-8. Timer/Counter Timing Diagram, no Prescaling
Figure 11-9 on page 80
• OCR0A changes its value from MAX, like in
• The timer starts counting from a value higher than the one in OCR0A, and for that reason
is MAX the OCn pin value is the same as the result of a down-counting Compare Match. To
ensure symmetry around BOTTOM the OCn value at MAX must correspond to the result of
an up-counting Compare Match.
misses the Compare Match and hence the OCn change that would have happened on the
way up.
TCNTn
(clk
TOVn
clk
clk
I/O
I/O
Tn
/1)
Figure 11-8
shows the same timing data, but with the prescaler enabled.
MAX - 1
contains timing data for basic Timer/Counter operation. The figure
Figure 11-7 on page 78
Table 10-7 on page
f
OCnxPCPWM
MAX
Figure 11-7 on page
=
----------------- -
N 510
f
clk_I/O
⋅
65). The actual OC0x value will only be
OCn has a transition from high to low
BOTTOM
78. When the OCR0A value
T0
) is therefore shown as a
BOTTOM + 1
79
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