AT80SND1C-ROTIL datasheet(151/210 Pages) ATMEL

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AT80SND1C-ROTIL 데이터시트(PDF) 151 Page - ATMEL Corporation

부품명	AT80SND1C-ROTIL

상세설명	Single-Chip Flash Microcontroller with MP3 Decoder and Human Interface

PDF	210 Pages

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제조업체	ATMEL [ATMEL Corporation]

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151 / 210 page

151

AT8xC51SND1C

4109E–8051–06/03

Interrupt

The SPI handles 2 interrupt sources that are the “end of transfer” and the “mode fault”

flags.

As shown in Figure 118, these flags are combined toghether to appear as a single inter-

rupt source for the C51 core. The SPIF flag is set at the end of an 8-bit shift in and out

and is cleared by reading SPSTA and then reading from or writing to SPDAT.

The MODF flag is set in case of mode fault error and is cleared by reading SPSTA and

then writing to SPCON.

The SPI interrupt is enabled by setting ESPI bit in IEN1 register. This assumes inter-

rupts are globally enabled by setting EA bit in IEN0 register.

Figure 118. SPI Interrupt System

ESPI

IEN1.2

SPI Controller

Interrupt Request

SPIF

SPSTA.7

MODF

SPSTA.4

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