AT90USB646 datasheet(216/434 Pages) ATMEL

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AT90USB646 Datasheet(PDF) 216 Page - ATMEL Corporation

Part #	AT90USB646

Description	Microcontroller with 64/128K Bytes of ISP Flash and USB Controller

PDF	434 Pages

Scroll/Zoom	100%

Manufacturer	ATMEL [ATMEL Corporation]

Direct Link	http://www.atmel.com

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216 / 434 page

216

7593A–AVR–02/06

AT90USB64/128

• The USART in MSPIM mode receiver includes an additional buffer level.

• The SPI WCOL (Write Collision) bit is not included in USART in MSPIM mode.

• The SPI double speed mode (SPI2X) bit is not included. However, the same effect is

achieved by setting UBRRn accordingly.

• Interrupt timing is not compatible.

• Pin control differs due to the master only operation of the USART in MSPIM mode.

A comparison of the USART in MSPIM mode and the SPI pins is shown in Table 19-4 on page

216.

Table 19-4.

Comparison of USART in MSPIM mode and SPI pins.

USART_MSPIM

SPI

Comment

TxDn

MOSI

Master Out only

RxDn

MISO

Master In only

XCKn

SCK

(Functionally identical)

(N/A)

Not supported by USART in MSPIM

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