ATMEGA163 ATMEL [ATMEL Corporation], ATMEGA163 Datasheet - Page 70
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ATMEGA163
Manufacturer Part Number
ATMEGA163
Description
8-bit Microcontroller with 16K Bytes In-System Programmable Flash
Manufacturer
ATMEL [ATMEL Corporation]
Datasheet
1.ATMEGA163.pdf
(187 pages)
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UART
Data Transmission
70
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:
•
•
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
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