ATTINY25V-10SH Atmel, ATTINY25V-10SH Datasheet - Page 101
![IC MCU AVR 2KB FLASH 10MHZ 8SOIC](/photos/6/50/65032/453-8-soic_sml.jpg)
ATTINY25V-10SH
Manufacturer Part Number
ATTINY25V-10SH
Description
IC MCU AVR 2KB FLASH 10MHZ 8SOIC
Manufacturer
Atmel
Series
AVR® ATtinyr
Datasheet
1.ATTINY25-20MU.pdf
(236 pages)
Specifications of ATTINY25V-10SH
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
8-SOIC (5.3mm Width), 8-SOP, 8-SOEIAJ
Processor Series
ATtiny
Core
AVR
Data Bus Width
8 bit
Data Ram Size
128 B
Interface Type
SPI, USI
Maximum Clock Frequency
10 MHz
Number Of Programmable I/os
6
Number Of Timers
2
Operating Supply Voltage
3.3 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
Operating Temperature Range
- 40 C to + 85 C
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
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13.2.1
2586M–AVR–07/10
Timer/Counter1 in PWM Mode
When the PWM mode is selected, Timer/Counter1 and the Output Compare Register A -
OCR1A form an 8-bit, free-running and glitch-free PWM generator with output on the
PB1(OC1A).
When the counter value match the content of OCR1A, the OC1A and output is set or cleared
according to the COM1A1/COM1A0 bits in the Timer/Counter1 Control Register A - TCCR1, as
shown in
Timer/Counter1 acts as an up-counter, counting from $00 up to the value specified in the output
compare register OCR1C, and starting from $00 up again. A compare match with OCR1C will
set an overflow interrupt flag (TOV1) after a synchronization delay following the compare event.
Table 13-1.
Note that in PWM mode, writing to the Output Compare Register OCR1A, the data value is first
transferred to a temporary location. The value is latched into OCR1A when the Timer/Counter
reaches OCR1C. This prevents the occurrence of odd-length PWM pulses (glitches) in the event
of an unsynchronized OCR1A. See
Figure 13-4. Effects of Unsynchronized OCR Latching
During the time between the write and the latch operation, a read from OCR1A will read the con-
tents of the temporary location. This means that the most recently written value always will read
out of OCR1A.
COM1A1
0
0
1
1
Unsynchronized OC1A Latch
Table
Synchronized OC1A Latch
Compare Mode Select in PWM Mode
COM1A0
13-1.
0
1
0
1
Effect on Output Compare Pin
OC1A not connected.
OC1A not connected.
OC1A cleared on compare match. Set when TCNT1 = $00.
OC1A set on compare match. Cleared when TCNT1 = $00.
Figure 13-4
Glitch
for an e xample.
Compare Value changes
Compare Value changes
Counter Value
Compare Value
PWM Output OC1A
Counter Value
Compare Value
PWM Output OC1A
101
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