L3GD20H datasheet(32/52 Pages) STMICROELECTRONICS

Part #	L3GD20H

Description	MEMS motion sensor: three-axis digital output gyroscope

PDF	52 Pages

Scroll/Zoom	100%

Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

Logo

32 / 52 page

Digital interfaces

L3GD20H

32/52

DocID023469 Rev 2

5.2.2

SPI write

Figure 20. SPI write protocol

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

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

bit 0: WRITE bit. The value is 0.

bit 1: MS bit. When 0 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 DI(7:0) (write mode). This is the data that will be written inside the device

(MSb first).

bit 16-... : data DI(...-8). Further data in multiple byte writing.

Figure 21. Multiple bytes SPI write protocol (2 bytes example)

SPC

SDI

D I7D I6 D I5D I4 DI3DI2

DI1DI0

AD5 AD 4 AD 3 AD2 AD 1 AD0

AM10132V1

SPC

SDI

AD5 AD4 AD3 AD2 AD1 AD 0

DI7 D I6 DI5 D I4 DI3 DI2 DI1 DI0 DI15 D I1 4DI13 D I1 2DI11 DI10 DI9 DI8

AM10133V1

L3GD20H Datasheet(PDF) 32 Page - STMicroelectronics