L3GD20H datasheet(31/52 Pages) STMICROELECTRONICS

部件名	L3GD20H

功能描述	MEMS motion sensor: three-axis digital output gyroscope

PDF	52 Pages

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制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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31 / 52 page

DocID023469 Rev 2

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L3GD20H

Digital interfaces

5.2.1

SPI read

Figure 18. SPI read protocol

The SPI Read command is performed with 16 clock pulses. Multiple byte read command is

performed adding blocks of 8 clock pulses at the previous one.

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).

bit 16-... : data DO(...-8). Further data in multiple byte reading.

Figure 19. Multiple bytes SPI read protocol (2 bytes example)

SPC

SDI

SDO

DO7 DO6 DO5 DO4 DO3 DO2 DO1 DO0

AD5 AD4 AD3 AD2 AD1 AD0

AM10130V1

SPC

SDI

SD O

DO 7 DO6 DO 5 DO4 DO 3 DO2 DO 1 DO0

A D5 A D4 AD 3 A D2 A D1 A D0

DO 15 DO 14 DO 13 DO 12 DO 11 DO 10 D O9 D O8

AM10131V1

L3GD20H 数据表(PDF) 31 Page - STMicroelectronics