ATtiny28L Atmel Corporation, ATtiny28L Datasheet - Page 34

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ATtiny28L

Manufacturer Part Number
ATtiny28L
Description
Manufacturer
Atmel Corporation
Datasheets

Specifications of ATtiny28L

Flash (kbytes)
2 Kbytes
Pin Count
28
Max. Operating Frequency
4 MHz
Cpu
8-bit AVR
Hardware Qtouch Acquisition
No
Max I/o Pins
11
Ext Interrupts
10
Usb Speed
No
Usb Interface
No
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Analog Comparators
1
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
0.03
Self Program Memory
NO
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
1.8 to 5.5
Operating Voltage (vcc)
1.8 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
1
32khz Rtc
No
Calibrated Rc Oscillator
Yes
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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

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