ATTINY25V-10MUR Atmel, ATTINY25V-10MUR Datasheet - Page 71
![MCU AVR 2KB FLASH 10MHZ 20QFN](/photos/6/87/68751/313-20-qfn_sml.jpg)
ATTINY25V-10MUR
Manufacturer Part Number
ATTINY25V-10MUR
Description
MCU AVR 2KB FLASH 10MHZ 20QFN
Manufacturer
Atmel
Series
AVR® ATtinyr
Datasheet
1.ATTINY25-20MU.pdf
(236 pages)
Specifications of ATTINY25V-10MUR
Core Processor
AVR
Core Size
8-Bit
Speed
10MHz
Connectivity
USI
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
6
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
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
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11.5
2586M–AVR–07/10
Output Compare Unit
Depending of the mode of operation used, the counter is cleared, incremented, or decremented
at each timer clock (clk
selected by the Clock Select bits (CS0[2:0]). When no clock source is selected (CS0[2:0] = 0)
the timer is stopped. However, the TCNT0 value can be accessed by the CPU, regardless of
whether clk
count operations.
The counting sequence is determined by the setting of the WGM01 and WGM00 bits located in
the Timer/Counter Control Register (TCCR0A) and the WGM02 bit located in the Timer/Counter
Control Register B (TCCR0B). There are close connections between how the counter behaves
(counts) and how waveforms are generated on the Output Compare output OC0A. For more
details about advanced counting sequences and waveform generation, see
tion” on page
The Timer/Counter Overflow Flag (TOV0) is set according to the mode of operation selected by
the WGM0[1:0] bits. TOV0 can be used for generating a CPU interrupt.
The 8-bit comparator continuously compares TCNT0 with the Output Compare Registers
(OCR0A and OCR0B). Whenever TCNT0 equals OCR0A or OCR0B, the comparator signals a
match. A match will set the Output Compare Flag (OCF0A or OCF0B) at the next timer clock
cycle. If the corresponding interrupt is enabled, the Output Compare Flag generates an Output
Compare interrupt. The Output Compare Flag is automatically cleared when the interrupt is exe-
cuted. Alternatively, the flag can be cleared by software by writing a logical one to its I/O bit
location. The Waveform Generator uses the match signal to generate an output according to
operating mode set by the WGM0[2:0] bits and Compare Output mode (COM0x[1:0]) bits. The
max and bottom signals are used by the Waveform Generator for handling the special cases of
the extreme values in some modes of operation
Figure 11-5
Figure 11-5. Output Compare Unit, Block Diagram
T0
shows a block diagram of the Output Compare unit.
bottom
FOCn
74.
is present or not. A CPU write overrides (has priority over) all counter clear or
top
OCRnx
T0
). clk
T0
can be generated from an external or internal clock source,
Waveform Generator
WGMn[1:0]
=
(8-bit Comparator )
DATA BUS
(See “Modes of Operation” on page
COMnX[1:0]
TCNTn
OCFnx (Int.Req.)
OCnx
“Modes of Opera-
74.).
71
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