ATTINY28V-1AC Atmel, ATTINY28V-1AC Datasheet - Page 34

• Manufacturer Part Number: ATTINY28V-1AC
• Description: IC AVR MCU 2K 1.2MHZ 1.8V 32TQFP
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY28V-1AC

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 1.2MHz
• Peripherals: POR, WDT
• Number Of I /o: 11
• Program Memory Size: 2KB (1K x 16)
• Program Memory Type: FLASH
• Voltage - Supply (vcc/vdd): 1.8 V ~ 5.5 V
• Oscillator Type: Internal
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 32-TQFP, 32-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Ram Size: -
• Data Converters: -
• Connectivity: -

Timer/Counter0
Timer/Counter Prescaler
34
ATtiny28L/V
The ATtiny28 provides one general-purpose 8-bit Timer/Counter – Timer/Counter0.
Timer/Counter0 has prescaling selection from the 10-bit prescaling timer. The
Timer/Counter0 can either be used as a timer with an internal clock time base or as a
counter with an external pin connection that triggers the counting.
Figure 28 shows the Timer/Counter prescaler.
Figure 28. Timer/Counter0 Prescaler
The four different prescaled selections are: the hardware modulator period, CK/64,
CK/256 and CK/1028, where CK is the oscillator clock. CK, external source and stop
can also be selected as clock sources.
Figure 29 shows the block diagram for Timer/Counter0.
Figure 29. Timer/Counter0 Block Diagram
FROM MODULATOR
COUNT ENABLE
INTERRUPT CONTROL
TIMER/COUNTER0
REGISTER (ICR)
CS00
CS01
CS02
CK
T0
(TCNT0)
T/C0 OVER-
FLOW IRQ
INTERRUPT FLAG
REGISTER (IFR)
TIMER/COUNTER0 CLOCK SOURCE
0
10-BIT T/C PRESCALER
TCK0
CONTROL
LOGIC
REGISTER (TCCR0)
T/C0 CONTROL
1062F–AVR–07/06
T0