ATMEGA640 datasheet(217/436 Pages) MICROCHIP

tên linh kiện	ATMEGA640

Giải thích chi tiết về linh kiện	8-bit Microcontroller with 16/32/64KB In-System Programmable Flash

PDF	436 Pages

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nhà sản xuất	MICROCHIP [Microchip Technology]

Trang chủ	http://www.microchip.com

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ATmega640/V-1280/V-1281/V-2560/V-2561/V [DATASHEET]

DS40002211A

4. The addressed MCU will receive all data frames until a new address frame is received. The other Slave

MCUs, which still have the MPCMn bit set, will ignore the data frames.

5. When the last data frame is received by the addressed MCU, the addressed MCU sets the MPCMn bit and

waits for a new address frame from master. The process then repeats from 2.

Using any of the 5-bit to 8-bit character frame formats is possible, but impractical since the Receiver must change

between using n and n+1 character frame formats. This makes full-duplex operation difficult since the Transmitter

and Receiver uses the same character size setting. If 5-bit to 8-bit character frames are used, the Transmitter must

be set to use two stop bit (USBSn = 1) since the first stop bit is used for indicating the frame type.

Do not use Read-Modify-Write instructions (SBI and CBI) to set or clear the MPCMn bit. The MPCMn bit shares the

same I/O location as the TXCn Flag and this might accidentally be cleared when using SBI or CBI instructions.

ATMEGA640 bảng dữ liệu(PDF) 217 Page - Microchip Technology