ATMEGA163-8AI Atmel, ATMEGA163-8AI Datasheet - Page 70

• Manufacturer Part Number: ATMEGA163-8AI
• Description: IC AVR MCU 16K A/D 8MHZ 44TQFP
• Manufacturer: Atmel
• Series: AVR® ATmegar

Specifications of ATMEGA163-8AI

• Core Processor: AVR
• Core Size: 8-Bit
• Speed: 8MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 32
• 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): 4 V ~ 5.5 V
• Data Converters: A/D 8x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

UART
Data Transmission
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ATmega163(L)
The ATmega163 features a full duplex (separate Receive and Transmit Registers) Uni-
versal Asynchronous Receiver and Transmitter (UART). The main features are:
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A block schematic of the UART transmitter is shown in Figure 45.
Figure 45. UART Transmitter
Data transmission is initiated by writing the data to be transmitted to the UART I/O Data
Register, UDR. Data is transferred from UDR to the Transmit Shift Register when:
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Baud Rate Generator Generates any Baud Rate
High Baud Rates at Low XTAL Frequencies
8 or 9 Bits Data
Noise Filtering
OverRun Detection
Framing Error Detection
False Start Bit Detection
Three Separate Interrupts on TX Complete, TX Data Register Empty, and RX Complete
Multi-processor Communication Mode
Double Speed UART Mode
A new character has been written to UDR after the stop bit from the previous
character has been shifted out. The Shift Register is loaded immediately.
A new character has been written to UDR before the stop bit from the previous
character has been shifted out. The Shift Register is loaded when the stop bit of the
character currently being transmitted has been shifted out.
1142E–AVR–02/03