AK7735EQ datasheet(74/142 Pages) AKM

Nome de Peças	AK7735EQ

Descrição Electrónicos	Dual DSP with 4chADC 4chDAC 4chSRC

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Fabricante Electrônico	AKM [Asahi Kasei Microsystems]

Página de início	http://www.akm.com

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74 / 142 page

[AK7735]

016014707-E-00

2016/12

- 74 -

2. Echo-Back Mode

The AK7735 has Echo-back mode that outputs the writing data sequentially from the SO pin.

2-1. Write

CSN

SI

COMMAND

ADDRESS1

ADDRESS2

DATA1

DATA2

COMMAND

ADDRESS1

SO

COMMAND

ADDRESS1

ADDRESS2

DATA1

COMMAND

don’tcare

(L/H)

Hi-Z

Figure 53. Echo-back Mode Writing (SPI)

The input data of the SI pin is echoed back on the SO pin by shifting 8-bits to the right. The last 1 byte

written data is not echoed-back. The data will not echoed-back when writing dummy command.

2-2. Read

CSN

SI

COMMAND

ADDRESS1

ADDRESS2

COMMAND

ADDRESS1

SO

COMMAND

DummyData

READ DATA

COMMAND

don’tcare

(L/H)

Hi-Z

Figure 54. Echo-back Mode Reading (SPI)

Data of the address1/2 fields are not echoed back in read operation. The read data on the SO pin is

output after writing to the address2 field.

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Asahi Kasei Microsystem...	AK7735	3Mb / 142P	Dual DSP with 4chADC 4chDAC 4chSRC
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