ATMEGA88-20AI Atmel, ATMEGA88-20AI Datasheet - Page 112
ATMEGA88-20AI
Manufacturer Part Number
ATMEGA88-20AI
Description
IC MCU AVR 8K 5V 20MHZ 32-TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA88-20AI
Core Processor
AVR
Core Size
8-Bit
Speed
20MHz
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)
2.7 V ~ 5.5 V
Data Converters
A/D 8x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
32-TQFP, 32-VQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Other names
ATMEGA88-24AI
ATMEGA88-24AI
ATMEGA88-24AI
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
- Current page: 112 of 378
- Download datasheet (8Mb)
15.3.1
15.4
112
Timer/Counter Clock Sources
ATmega48/88/168
Reusing the Temporary High Byte Register
Note:
The assembly code example requires that the r17:r16 register pair contains the value to be writ-
ten to TCNT1.
If writing to more than one 16-bit register where the high byte is the same for all registers written,
then the high byte only needs to be written once. However, note that the same rule of atomic
operation described previously also applies in this case.
The Timer/Counter can be clocked by an internal or an external clock source. The clock source
is selected by the Clock Select logic which is controlled by the Clock Select (CS12:0) bits
located in the Timer/Counter control Register B (TCCR1B). For details on clock sources and
prescaler, see
Assembly Code Example
C Code Example
TIM16_WriteTCNT1:
void TIM16_WriteTCNT1( unsigned int i )
{
}
; Save global interrupt flag
in r18,SREG
; Disable interrupts
cli
; Set TCNT1 to r17:r16
out TCNT1H,r17
out TCNT1L,r16
; Restore global interrupt flag
out SREG,r18
ret
unsigned char sreg;
unsigned int i;
/* Save global interrupt flag */
sreg = SREG;
/* Disable interrupts */
_CLI();
/* Set TCNT1 to i */
TCNT1 = i;
/* Restore global interrupt flag */
SREG = sreg;
1.
See ”About Code Examples” on page 7.
For I/O Registers located in extended I/O map, “IN”, “OUT”, “SBIS”, “SBIC”, “CBI”, and “SBI”
instructions must be replaced with instructions that allow access to extended I/O. Typically
“LDS” and “STS” combined with “SBRS”, “SBRC”, “SBR”, and “CBR”.
“Timer/Counter0 and Timer/Counter1 Prescalers” on page
(1)
(1)
136.
2545S–AVR–07/10
Related parts for ATMEGA88-20AI
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Manufacturer:
Atmel Corporation
Datasheet:
Part Number:
Description:
Manufacturer:
Atmel Corporation
Datasheet:
Part Number:
Description:
MCU AVR 8K FLASH 15MHZ 32-QFN
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
IC AVR MCU 8K 20MHZ 5V 32TQFP
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
IC AVR MCU 8K 20MHZ 5V 32-QFN
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
IC AVR MCU 8K 20MHZ 5V 28DIP
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
IC MCU AVR 8K 5V 20MHZ 32-TQFP
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
IC MCU AVR 8K 5V 20MHZ 32-QFN
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
IC MCU AVR 8K 5V 20MHZ 32-QFN
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
IC MCU AVR 8K 5V 20MHZ 28-DIP
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
IC MCU AVR 8K 5V 20MHZ 28-DIP
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
MCU AVR 8K FLASH 20MHZ 32TQFP
Manufacturer:
Atmel
Datasheet:
Part Number:
Description:
MCU AVR 8K FLASH 20MHZ 32QFN
Manufacturer:
Atmel
Datasheet: