ATMEGA88V-10MI Atmel, ATMEGA88V-10MI Datasheet - Page 152
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ATMEGA88V-10MI
Manufacturer Part Number
ATMEGA88V-10MI
Description
IC MCU AVR 8K 5V 10MHZ 32-QFN
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA88V-10MI
Core Processor
AVR
Core Size
8-Bit
Speed
10MHz
Connectivity
I²C, SPI, UART/USART
Peripherals
Brown-out Detect/Reset, POR, PWM, WDT
Number Of I /o
23
Program Memory Size
8KB (4K x 16)
Program Memory Type
FLASH
Eeprom Size
512 x 8
Ram Size
1K x 8
Voltage - Supply (vcc/vdd)
1.8 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
32-VQFN Exposed Pad, 32-HVQFN, 32-SQFN, 32-DHVQFN
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
ATMEGA88V-12MI
ATMEGA88V-12MI
ATMEGA88V-12MI
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17.11 Register Description
17.11.1
152
ATmega48/88/168
TCCR2A – Timer/Counter Control Register A
The clock source for Timer/Counter2 is named clk
system I/O clock clk
clocked from the TOSC1 pin. This enables use of Timer/Counter2 as a Real Time Counter
(RTC). When AS2 is set, pins TOSC1 and TOSC2 are disconnected from Port C. A crystal can
then be connected between the TOSC1 and TOSC2 pins to serve as an independent clock
source for Timer/Counter2. The Oscillator is optimized for use with a 32.768 kHz crystal.
For Timer/Counter2, the possible prescaled selections are: clk
clk
Setting the PSRASY bit in GTCCR resets the prescaler. This allows the user to operate with a
predictable prescaler.
• Bits 7:6 – COM2A1:0: Compare Match Output A Mode
These bits control the Output Compare pin (OC2A) behavior. If one or both of the COM2A1:0
bits are set, the OC2A output overrides the normal port functionality of the I/O pin it is connected
to. However, note that the Data Direction Register (DDR) bit corresponding to the OC2A pin
must be set in order to enable the output driver.
When OC2A is connected to the pin, the function of the COM2A1:0 bits depends on the
WGM22:0 bit setting.
are set to a normal or CTC mode (non-PWM).
Table 17-2.
Table 17-3 on page 153
to fast PWM mode.
Bit
(0xB0)
Read/Write
Initial Value
T2S
COM2A1
/128, clk
0
0
1
1
T2S
Compare Output Mode, non-PWM Mode
COM2A1
R/W
/256, and clk
COM2A0
7
0
0
1
0
1
IO
Table 17-2
. By setting the AS2 bit in ASSR, Timer/Counter2 is asynchronously
COM2A0
shows the COM2A1:0 bit functionality when the WGM21:0 bits are set
R/W
6
0
Description
Normal port operation, OC2A disconnected.
Toggle OC2A on Compare Match
Clear OC2A on Compare Match
Set OC2A on Compare Match
T2S
/1024. Additionally, clk
shows the COM2A1:0 bit functionality when the WGM22:0 bits
COM2B1
R/W
5
0
COM2B0
R/W
4
0
T2S
. clk
R
3
–
0
T2S
T2S
as well as 0 (stop) may be selected.
is by default connected to the main
R
2
0
–
T2S
WGM21
/8, clk
R/W
1
0
T2S
WGM20
R/W
/32, clk
0
0
2545S–AVR–07/10
TCCR2A
T2S
/64,
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