AD5362 datasheet(23/25 Pages) AD

23 / 25 page

Preliminary Technical Data

AD5362/AD5363

Rev. P

rF | Page 23 of 25

INTERFACING EXAMPLES

The SPI interface of the AD5362 and AD5363 are designed to

allow the parts to be easily connected to industry standard DSPs

and micro-controllers. Figure 11 shows how the

AD5362/AD5363 could be connected to the Analog Devices

Blackfin

DSP. The Blackfin has an integrated SPI port which

can be connected directly to the SPI pins of the AD5362 or

AD5363 and programmable I/O pins which can be used to set

or read the state of the digital input or output pins associated

with the interface.

SYNC

SCLK

SDI

SDO

CLR

LDAC

RESET

BUSY

SPISELx

SCK

MOSI

MISO

PF8

PF9

PF10

PF7

AD536x

ADSP-BF531

536x-0101

Figure 11. Interfacing to an Blackfin DSP

The Analog Devices ADSP-21065L is a floating point DSP with

two serial ports (SPORTS). Figure 12 shows how one SPORT

can be used to control the AD5362 or AD5363. In this example

the Transmit Frame Synchronization (TFS) pin is connected to

the Receive Frame Synchronization (RFS) pin. Similarly the

transmit and receive clocks (TCLK and RCLK) are also

connected together. The user can write to the AD5362 or

AD5363 by writing to the transmit register. A read operation

can be accomplished by first writing to the AD5362/AD5363 to

tell the part that a read operation is required. A second write

operation with a NOP instruction will cause the data to be read

from the AD5362/AD5363. The DSPs receive interrupt can be

used to indicate when the read operation is complete.

SYNC

SCLK

SDI

SDO

CLR

LDAC

RESET

BUSY

TFSx

RFSx

TCLKx

RCLKx

DTxA

DRxA

FLAG2

FLAG1

FLAG0

FLAG3

AD536x

536x-0101

ADSP-21065L

Figure 12. Interfacing to a ADSP-21065L DSP

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