ATTINY10-MAHR Atmel, ATTINY10-MAHR Datasheet - Page 56
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ATTINY10-MAHR
Manufacturer Part Number
ATTINY10-MAHR
Description
MCU AVR 1024K FLASH 12MHZ 8UDFN
Manufacturer
Atmel
Series
AVR® ATtinyr
Specifications of ATTINY10-MAHR
Core Processor
AVR
Core Size
8-Bit
Speed
12MHz
Peripherals
POR, PWM, WDT
Number Of I /o
4
Program Memory Size
1KB (512 x 16)
Program Memory Type
FLASH
Ram Size
32 x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Data Converters
A/D 4x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 125°C
Package / Case
*
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Connectivity
-
Lead Free Status / Rohs Status
Details
Other names
ATTINY10-MAH
ATTINY10-MAH
ATTINY10-MAH
- Current page: 56 of 169
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11.3.2
11.4
56
Counter Unit
ATtiny4/5/9/10
External Clock Source
clock cycles from when the timer is enabled to the first count occurs can be from 1 to N+1 sys-
tem clock cycles, where N equals the prescaler divisor (8, 64, 256, or 1024).
It is possible to use the Prescaler Reset for synchronizing the Timer/Counter to program
execution.
An external clock source applied to the T0 pin can be used as Timer/Counter clock (clk
Tn pin is sampled once every system clock cycle by the pin synchronization logic. The synchro-
nized (sampled) signal is then passed through the edge detector.
a functional equivalent block diagram of the T0 synchronization and edge detector logic. The
registers are clocked at the positive edge of the internal system clock (
parent in the high period of the internal system clock.
The edge detector generates one clk
6) edge it detects.
Figure 11-3. T0 Pin Sampling
The synchronization and edge detector logic introduces a delay of 2.5 to 3.5 system clock cycles
from an edge has been applied to the T0 pin to the counter is updated.
Enabling and disabling of the clock input must be done when T0 has been stable for at least one
system clock cycle, otherwise it is a risk that a false Timer/Counter clock pulse is generated.
Each half period of the external clock applied must be longer than one system clock cycle to
ensure correct sampling. The external clock must be guaranteed to have less than half the sys-
tem clock frequency (f
sampling, the maximum frequency of an external clock it can detect is half the sampling fre-
quency (Nyquist sampling theorem). However, due to variation of the system clock frequency
and duty cycle caused by oscillator source (crystal, resonator, and capacitors) tolerances, it is
recommended that maximum frequency of an external clock source is less than f
An external clock source can not be prescaled.
The main part of the 16-bit Timer/Counter is the programmable 16-bit bi-directional counter unit.
Figure 11-4 on page 57
Tn
clk
I/O
D
LE
Q
ExtClk
shows a block diagram of the counter and its surroundings.
Synchronization
D
< f
clk_I/O
Q
/2) given a 50/50% duty cycle. Since the edge detector uses
T
0
pulse for each positive (CS2:0 = 7) or negative (CS2:0 =
D
Figure 11-3 on page 56
Q
clk
I/O
Edge Detector
). The latch is trans-
clk_I/O
8127D–AVR–02/10
/2.5.
Tn_sync
(To Clock
Select Logic)
Tn
shows
). The
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