L3GD20 데이터 시트보기 (PDF) - STMicroelectronics

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L3GD20

MEMS motion sensor: three-axis digital output gyroscope

STMicroelectronics 

Digital interfaces

Figure 17. SPI read protocol in 3-wire mode

L3GD20

CS

SPC

SDI/O

RW

D O7 D O6 D O5 DO4 DO3 DO2 DO1 DO0

MS AD5 AD 4 AD 3 AD2 AD1 AD 0

AM10134V1

The SPI Read command is performed with 16 clock pulses:

bit 0: READ bit. The value is 1.

bit 1: MS bit. When 0, do not increment address; when 1, increment address in multiple

reading.

bit 2-7: address AD(5:0). This is the address field of the indexed register.

bit 8-15: data DO(7:0) (read mode). This is the data that will be read from the device (MSb

first).

Multiple read command is also available in 3-wire mode.

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Doc ID 022116 Rev 1

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