AS5403D-HTST datasheet(29/66 Pages) AMSCO

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ams Datasheet

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[v1-06] 2015-Aug-28

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AS5403A/D/E − 4-Wire Serial Peripheral Interface (SPI)

Read (1)

The read command is composed by 2 frames, in the first one

the external master sends the command, the even parity and

the address to be read on the SDO line (the last 16 bits are

ignored). The device forces the SDO pin low.

Figure 32:

SPI Read

After the switching time (TSCSL) the device drives the SDO line

and when the SCS pin goes high starts to send out the answer.

The first byte of the second frame is composed by the command

the device is executing, the even parity and the MSBs of the

address required in the previous frame (AD<10:8>). The second

byte of the command is the remaining part of the address

AD<7:0>, the third and the fourth bytes are the data word at

the required address (AD<10:0>). With this command it is

possible to access the EEPROM locations and the read/write

registers area.

SDI

SDO

SCLK

SCS

CMD

PAR

AD 10

AD9

AD8

AD7

AD6

AD5

AD4

AD3

AD 2

AD1

AD0

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