AT90SCR100 datasheet(286/433 Pages) ATMEL

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AT90SCR100 데이터시트(PDF) 286 Page - ATMEL Corporation

부품명	AT90SCR100

상세설명	8-bit Microcontroller for Smart Card Readers

PDF	433 Pages

Scroll/Zoom	100%

제조업체	ATMEL [ATMEL Corporation]

홈페이지	http://www.atmel.com

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286 / 433 page

286

TPR0327AY–SMS–30Jan09

AT90SCR100

21.3

HSSS line Functionality

21.3.1

Slave Mode

When the HSSPI is configured as a Slave (HSSPICFG.MSTR bit cleared), the Slave Select

(HSSS) line is driven by the master device. The HSSS has no effect on the HSSPI logic. It is the

software’s responsibility to manage the HSSS level.

21.3.2

Master Mode

When the HSSPI is configured as a Master (HSSPICFG.MSTR bit set), the HSSS line is used to

select the slave.

21.4

Data Modes

There are four combinations of SCK phase and polarity with respect to serial data, which are

determined by control bits CPHA and CPOL. The SPI data transfer formats are shown in Figure

21-9 and Figure 21-10.

Figure 21-9.

SPI Transfer Format with CPHA = 0

Figure 21-10.

SPI Transfer Format with CPHA = 1

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