AT80SND1C-ROTIL datasheet(157/210 Pages) ATMEL

tên linh kiện	AT80SND1C-ROTIL

Giải thích chi tiết về linh kiện	Single-Chip Flash Microcontroller with MP3 Decoder and Human Interface

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157

AT8xC51SND1C

4109E–8051–06/03

Table 133. SPSTA Register

SPSTA (S:C4h) – SPI Status Register

Reset Value = 00000 0000b

Table 134. SPDAT Register

SPDAT (S:C5h) – Synchronous Serial Data Register

Reset Value = XXXX XXXXb

7654

3210

SPIF

WCOL

MODF

----

Bit

Number

Bit

Mnemonic

Description

7SPIF

SPI Interrupt Flag

Set by hardware when an 8-bit shift is completed.

Cleared by hardware when reading or writing SPDAT after reading SPSTA.

6WCOL

Write Collision Flag

Set by hardware to indicate that a collision has been detected.

Cleared by hardware to indicate that no collision has been detected.

Reserved

The value read from this bit is indeterminate. Do not set this bit.

4MODF

Mode Fault

Set by hardware to indicate that the SS pin is at an appropriate level.

Cleared by hardware to indicate that the SS pin is at an inappropriate level.

3 - 0

Reserved

The value read from these bits is indeterminate. Do not set these bits.

7654

3210

SPD7

SPD6SPD5SPD4SPD3SPD2SPD1

SPD0

Bit

Number

Bit

Mnemonic

Description

7 - 0

SPD7:0

Synchronous Serial Data.

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