LSM303AGR datasheet(39/68 Pages) STMICROELECTRONICS

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LSM303AGR データシート(PDF) 39 Page - STMicroelectronics

部品番号	LSM303AGR

部品情報	Ultra-compact high-performance eCompass module: ultra-low-power 3D accelerometer and 3D magnetometer

PDF	68 Pages

Scroll/Zoom	100%

メーカー	STMICROELECTRONICS [STMicroelectronics]

ホームページ	http://www.st.com

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39 / 68 page

DocID027765 Rev 5

39/68

LSM303AGR

Digital interfaces

6.2.1

Accelerometer SPI write

Figure 11. Accelerometer SPI write protocol

The SPI Write command is performed with 16 clock pulses. A multiple byte write command

is performed by adding blocks of 8 clock pulses to the previous one.

bit 0: WRITE bit. The value is 0.

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

writing.

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

bit 8-15. data 01(7:0) {write mode). This is the data that is written inside the device (MSb

first).

bit 16-...: data Dl(...-8). Further data in multiple byte writes.

Figure 12. Accelerometer multiple byte SPI write protocol (2-byte example)

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