ATmega16 datasheet(142/315 Pages) ATMEL

Part #	ATMEGA16

Description	8-bit AVR Microcontroller with 16K Bytes In-System Programmable Flash

PDF	315 Pages

Scroll/Zoom	100%

Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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142 / 315 page

142

ATmega16(L)

2466E–AVR–10/02

The USART Character SiZe (UCSZ2:0) bits select the number of data bits in the frame.

The USART Parity mode (UPM1:0) bits enable and set the type of parity bit. The selec-

tion between one or two stop bits is done by the USART Stop Bit Select (USBS) bit. The

receiver ignores the second stop bit. An FE (Frame Error) will therefore only be detected

in the cases where the first stop bit is zero.

Parity Bit Calculation

The parity bit is calculated by doing an exclusive-or of all the data bits. If odd parity is

used, the result of the exclusive or is inverted. The relation between the parity bit and

data bits is as follows::

even

Parity bit using even parity

odd

Parity bit using odd parity

Data bit n of the character

If used, the parity bit is located between the last data bit and first stop bit of a serial

frame.

even

–

… d

odd

⊕⊕⊕

⊕⊕

⊕

–

… d

⊕⊕⊕

⊕⊕

⊕

ATMEGA16 Datasheet(PDF) 142 Page - ATMEL Corporation