LPS25HB datasheet(23/40 Pages) STMICROELECTRONICS

部件名	LPS25HB

功能描述	MEMS pressure sensor: 260-1260 hPa absolute digital output barometer

PDF	40 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

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23 / 40 page

DocID027112 Rev 2

23/40

LPS25HB

Digital interfaces

Figure 10. Multiple byte SPI write protocol (2-byte example)

6.3.3

SPI read in 3-wire mode

A 3-wire mode is entered by setting to ‘1’ bit SIM (SPI serial interface mode selection) in

CTRL_REG1.

Figure 11. SPI read protocol in 3-wire mode

The SPI read command is performed with 16 clock pulses:

bit 0: READ bit. The value is 1.

bit 1: MS bit. When 0, does not increment the address; when 1, increments the address in

multiple reads.

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 is read from the device (MSb first).

A multiple read command is also available in 3-wire mode.

SPC

SDI

AD5 AD4 AD3 AD2 AD1 AD0

DI7 DI6 DI5 DI4 DI3 DI2 DI1 DI0 DI15 DI14 DI13 DI12 DI11 DI10 DI9 DI8

SPC

SDI/O

DO7 DO6 DO5 DO4 DO3 DO2 DO1 DO0

AD5 AD4 AD3 AD2 AD1 AD0

LPS25HB 数据表(PDF) 23 Page - STMicroelectronics