DocID025978 Rev 1
7/26
AN4450
Hardware (designing PCB schematics and layout)
26
2.1.2 Pin
mapping
Table 1. LPS25H pin mapping details
Pin #
Name
Function
What to do
1
VDD_IO
Power supply for I/O pins
I/O supply voltage (1.7V ~ 3.6V)
2
SCL
SPC
I²C serial clock (SCL)
SPI serial port clock (SPC)
Optional pull-up resistor, connected to VDD_IO,
could be required for I²C (see I²C standard for
recommended value)
3
Reserved
Reserved
Connect to PCB ground
4
SDA
SDI
SDIO
I²C serial data (SDA)
4-wire SPI serial data input (SDI)
3-wire SPI serial data input/output (SDIO)
Optional pull-up resistor, connected to VDD_IO,
could be required for I²C (see I²C standard for
recommended value)
5
SA0
SDO
I²C slave address select (SA0)
4-wire SPI serial data output (SDO)
SA0=1: 0xBA/BB I²C slave a R/W
SA0=0:
0
xB8/B9 I²C slave a R/W
6
CS
I²C/SPI mode selection
SPI chip select
CS=1: I²C mode
CS=ChipSelect in SPI mode
7
INT1
Interrupt 1 (or data ready)
Leave unconnected if unused
8
GND_IO
I/O pins ground
Connect to PCB ground
9
GND
Ground
Connect to PCB ground
10
VDD
Power supply
Supply voltage (1.7V ~ 3
.
6V)
