ATMEGA168A-AU Atmel, ATMEGA168A-AU Datasheet - Page 210
![IC MCU AVR 16K FLASH 32TQFP](/photos/6/91/69154/313-32-tqfp_sml.jpg)
ATMEGA168A-AU
Manufacturer Part Number
ATMEGA168A-AU
Description
IC MCU AVR 16K FLASH 32TQFP
Manufacturer
Atmel
Series
AVR® ATmegar
Specifications of ATMEGA168A-AU
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
16KB (8K 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-TQFP, 32-VQFP
Processor Series
ATMEGA168x
Core
AVR8
Data Bus Width
8 bit
Data Ram Size
1 KB
Interface Type
2-Wire, SPI
Maximum Clock Frequency
20 MHz
Number Of Programmable I/os
23
Number Of Timers
3
Operating Supply Voltage
1.8 V to 5.5 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit, 8 Channel
On-chip Dac
10 bit, 8 Channel
Controller Family/series
Atmega
No. Of I/o's
23
Eeprom Memory Size
512Byte
Ram Memory Size
1KB
Cpu Speed
20MHz
Rohs Compliant
Yes
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATMEGA168A-AU
Manufacturer:
ATMEL
Quantity:
464
Part Number:
ATMEGA168A-AU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
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- Download datasheet (23Mb)
20.6.1
20.6.2
8271C–AVR–08/10
Transmitter and Receiver Flags and Interrupts
Disabling the Transmitter or Receiver
Note:
The RXCn, TXCn, and UDREn flags and corresponding interrupts in USART in MSPIM mode
are identical in function to the normal USART operation. However, the receiver error status flags
(FE, DOR, and PE) are not in use and is always read as zero.
The disabling of the transmitter or receiver in USART in MSPIM mode is identical in function to
the normal USART operation.
ATmega48A/48PA/88A/88PA/168A/168PA/328/328
Assembly Code Example
C Code Example
USART_MSPIM_Transfer:
USART_MSPIM_Wait_RXCn:
unsigned char USART_Receive( void )
{
}
; Wait for empty transmit buffer
in r16, UCSRnA
sbrs r16, UDREn
rjmp USART_MSPIM_Transfer
; Put data (r16) into buffer, sends the data
out UDRn,r16
; Wait for data to be received
in r16, UCSRnA
sbrs r16, RXCn
rjmp USART_MSPIM_Wait_RXCn
; Get and return received data from buffer
in r16, UDRn
ret
/* Wait for empty transmit buffer */
while ( !( UCSRnA & (1<<UDREn)) );
/* Put data into buffer, sends the data */
UDRn = data;
/* Wait for data to be received */
while ( !(UCSRnA & (1<<RXCn)) );
/* Get and return received data from buffer */
return UDRn;
1.
See ”About Code Examples” on page 7.
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210
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