ATTINY13A-MMUR Atmel, ATTINY13A-MMUR Datasheet - Page 65
![MCU AVR 1KB FLASH 20MHZ 10QFN](/photos/12/13/121304/313-10m1_sml.jpg)
ATTINY13A-MMUR
Manufacturer Part Number
ATTINY13A-MMUR
Description
MCU AVR 1KB FLASH 20MHZ 10QFN
Manufacturer
Atmel
Series
AVR® ATtinyr
Datasheet
1.ATTINY13A-SSH.pdf
(176 pages)
Specifications of ATTINY13A-MMUR
Core Processor
AVR
Core Size
8-Bit
Speed
20MHz
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
6
Program Memory Size
1KB (512 x 16)
Program Memory Type
FLASH
Eeprom Size
64 x 8
Ram Size
64 x 8
Voltage - Supply (vcc/vdd)
1.8 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
Connectivity
-
Lead Free Status / Rohs Status
Details
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATTINY13A-MMUR
Manufacturer:
TI
Quantity:
4 430
- Current page: 65 of 176
- Download datasheet (5Mb)
11.7.3
8126E–AVR–07/10
Fast PWM Mode
The timing diagram for the CTC mode is shown in
(TCNT0) increases until a Compare Match occurs between TCNT0 and OCR0A, and then coun-
ter (TCNT0) is cleared.
Figure 11-5. CTC Mode, Timing Diagram
An interrupt can be generated each time the counter value reaches the TOP value by using the
OCF0A Flag. If the interrupt is enabled, the interrupt handler routine can be used for updating
the TOP value. However, changing TOP to a value close to BOTTOM when the counter is run-
ning with none or a low prescaler value must be done with care since the CTC mode does not
have the double buffering feature. If the new value written to OCR0A is lower than the current
value of TCNT0, the counter will miss the Compare Match. The counter will then have to count to
its maximum value (0xFF) and wrap around starting at 0x00 before the Compare Match can
occur.
For generating a waveform output in CTC mode, the OC0A output can be set to toggle its logical
level on each Compare Match by setting the Compare Output mode bits to toggle mode
(COM0A[1:0] = 1). The OC0A value will not be visible on the port pin unless the data direction
for the pin is set to output. The waveform generated will have a maximum frequency of f
f
equation:
The N variable represents the prescale factor (1, 8, 64, 256, or 1024).
As for the Normal mode of operation, the TOV0 Flag is set in the same timer clock cycle that the
counter counts from MAX to 0x00.
The fast Pulse Width Modulation or fast PWM mode (WGM0[2:0] = 3 or 7) provides a high fre-
quency PWM waveform generation option. The fast PWM differs from the other PWM option by
its single-slope operation. The counter counts from BOTTOM to TOP then restarts from BOT-
TOM. TOP is defined as 0xFF when WGM0[2:0] = 3, and OCR0A when WGM0[2:0] = 7. In non-
inverting Compare Output mode, the Output Compare (OC0x) is cleared on the Compare Match
between TCNT0 and OCR0x, and set at BOTTOM. In inverting Compare Output mode, the out-
put is set on Compare Match and cleared at BOTTOM. Due to the single-slope operation, the
operating frequency of the fast PWM mode can be twice as high as the phase correct PWM
mode that use dual-slope operation. This high frequency makes the fast PWM mode well suited
clk_I/O
TCNTn
OCn
(Toggle)
Period
/2 when OCR0A is set to zero (0x00). The waveform frequency is defined by the following
1
f
OCnx
2
=
--------------------------------------------------
2 N
3
⋅
⋅
(
f
clk_I/O
1
+
Figure 11-5 on page
OCRnx
4
)
65. The counter value
OCnx Interrupt Flag Set
(COMnx[1:0] = 1)
OC0
65
=
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