ATTINY861-15MZ Atmel, ATTINY861-15MZ Datasheet - Page 74

• Manufacturer Part Number: ATTINY861-15MZ
• Description: MCU AVR 8K FLASH 15MHZ 32-QFN
• Manufacturer: Atmel
• Series: AVR® ATtinyr

Specifications of ATTINY861-15MZ

• Package / Case: 32-VQFN Exposed Pad, 32-HVQFN, 32-SQFN, 32-DHVQFN
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Speed: 16MHz
• Number Of I /o: 16
• Eeprom Size: 512 x 8
• Core Processor: AVR
• Program Memory Type: FLASH
• Ram Size: 512 x 8
• Program Memory Size: 8KB (8K x 8)
• Data Converters: A/D 11x10b
• Oscillator Type: Internal
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Connectivity: USI
• Core Size: 8-Bit
• Processor Series: ATTINY8x
• Core: AVR8
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Interface Type: SPI
• Maximum Clock Frequency: 16 MHz
• Number Of Programmable I/os: 16
• Number Of Timers: 2
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: EWAVR, EWAVR-BL
• Development Tools By Supplier: ATAVRDRAGON, ATSTK500, ATSTK600, ATAVRISP2, ATAVRONEKIT, ATAVRMC320
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 10 bit, 11 Channel
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

14.5
Table 14-3.
14.5.1
14.5.2
74
Mode
0
1
2
3
4
Modes of Operation
ATtiny261/461/861
Normal 8-bit Mode
Clear Timer on Compare Match (CTC) 8-bit Mode
ICEN0
0
0
0
1
1
Modes of operation
TCW0
0
0
1
0
1
internal clock source, selected by the Clock Select bits (CS02:0). When no clock source is
selected (CS02:0 = 0) the timer is stopped. However, the TCNT0 value can be accessed by the
CPU, regardless of whether clk
counter clear or count operations. The Timer/Counter Overflow Flag (TOV0) is set when the
counter reaches the maximum value and it can be used for generating a CPU interrupt.
The mode of operation is defined by the Timer/Counter Width (TCW0), Input Capture Enable
(ICEN0) and Wave Generation Mode (WGM00) bits in
ister A” on page
In the Normal 8-bit mode, see
until it overruns when it passes its maximum 8-bit value (MAX = 0xFF) and then restarts from the
bottom (0x00). The Overflow Flag (TOV0) will be set in the same timer clock cycle as the
TCNT0L becomes zero. The TOV0 Flag in this case behaves like a ninth bit, except that it is only
set, not cleared. However, combined with the timer overflow interrupt that automatically clears
the TOV0 Flag, the timer resolution can be increased by software. There are no special cases to
consider in the Normal 8-bit mode, a new counter value can be written anytime. The Output
Compare Unit can be used to generate interrupts at some given time.
In Clear Timer on Compare or CTC mode, see
used to manipulate the counter resolution. In CTC mode the counter is cleared to zero when the
counter value (TCNT0) matches the OCR0A. The OCR0A defines the top value for the counter,
hence also its resolution. This mode allows greater control of the Compare Match output fre-
quency. It also simplifies the operation of counting external events.
The timing diagram for the CTC mode is shown in
increases until a Compare Match occurs between TCNT0 and OCR0A, and then counter
(TCNT0) is cleared.
WGM00
X
X
X
0
1
84.
16-bit Input Capture Mode
8-bit Input Capture Mode
Timer/Counter Mode
Table 14-3
Normal 8-bit Mode
of Operation
16-bit Mode
8-bit CTC
T0
Table 14-3 on page
shows the different Modes of Operation.
is present or not. A CPU write overrides (has priority over) all
OCR0A
0xFFFF
0xFFFF
Table 14-3 on page
0xFF
0xFF
TOP
74, the counter (TCNT0L) is incrementing
Figure
”TCCR0A – Timer/Counter0 Control Reg-
14-2. The counter value (TCNT0)
Immediate
Update of
Immediate
Immediate
Immediate
Immediate
OCRx at
74, the OCR0A Register is
MAX (0xFFFF)
MAX (0xFFFF)
MAX (0xFF)
MAX (0xFF)
MAX (0xFF)
TOV Flag
2588B–AVR–11/06
Set on