AD1940 データシートの表示（PDF） - Analog Devices

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AD1940

SigmaDSP Multichannel 28-Bit Audio Processor

Analog Devices 

AD1940/AD1941

TABLE OF CONTENTS

Specifications..................................................................................... 3

Digital I/O ..................................................................................... 3

Power.............................................................................................. 3

Digital Timing............................................................................... 4

PLL ................................................................................................. 5

Regulator........................................................................................ 5

Temperature Range ...................................................................... 5

Absolute Maximum Ratings............................................................ 6

ESD Caution.................................................................................. 6

Digital Timing Diagrams................................................................. 7

Pin Configuration and Function Descriptions............................. 9

Features ............................................................................................ 11

Pin Functions .............................................................................. 12

Signal Processing ............................................................................ 14

Overview...................................................................................... 14

Numeric Formats........................................................................ 14

Programming .............................................................................. 14

Control Port..................................................................................... 15

Overview...................................................................................... 15

AD1940 SPI Port ........................................................................ 15

REVISION HISTORY

4/05—Rev. 0 to Rev. A

Added AD1941............................................................... Universal

Changes to Specifications ............................................................3

Changes to Pin Function Descriptions......................................9

Changes to Features Section......................................................11

Changes to Pin Functions Section............................................13

Addition of AD1940 SPI Port Section .....................................15

Added Table 13 to Table 16 .......................................................18

7/04—Revision 0: Initial Version

AD1941 I2C Port......................................................................... 15

RAMs and Registers....................................................................... 19

Control Port Addressing............................................................ 19

Parameter RAM Contents......................................................... 19

Recommended Program/Parameter Loading Procedures.... 20

Target/Slew RAM ....................................................................... 20

Safeload Registers....................................................................... 23

Data Capture Registers .............................................................. 23

DSP Core Control Register ....................................................... 24

RAM Configuration Register ................................................... 25

Control Port Read/Write Data Formats .................................. 25

Serial Data Input/Output Ports .................................................... 28

Serial Output Control Registers ............................................... 30

Serial Input Control Register .................................................... 30

Initialization .................................................................................... 33

Power-Up Sequence ................................................................... 33

Setting Master Clock/PLL Mode.............................................. 33

Voltage Regulator ....................................................................... 33

Outline Dimensions ....................................................................... 35

Ordering Guide .......................................................................... 35

Rev. A | Page 2 of 36

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