ASM330LHB datasheet(36/131 Pages) STMICROELECTRONICS

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Table 18. Internal pin status

Pin #

Name

Pin function

Pin status

SDO

SPI 4-wire interface serial data output (SDO)

Default: input without pull-up

Pull-up is enabled if bit SDO_PU_EN = 1 in register PIN_CTRL (02h).

SA0

I²C least significant bit of the device address (SA0)

MIPI I3CSM least significant bit of the static address (SA0)

MSDA

Connect to Vdd_IO or GND

Default: input without pull-up (see Note to enable pull-up)

MSCL

Connect to Vdd_IO or GND

Default: input without pull-up (see Note to enable pull-up)

INT1

Programmable interrupt 1.

If device is used as MIPI I3CSM pure slave, this pin must be set to 1.

Default: input with pull-down(1)

Pull-down is disabled if bit PD_DIS_INT1 = 1 in register I3C_BUS_AVB

(62h).

Vdd_IO

Power supply for I/O pins

Connect to Vdd_IO or GND or leave unconnected

GND

0 V supply

Vdd

Power supply

INT2

Programmable interrupt 2 (INT2) / data enabled (DEN)

Default: output forced to ground

Leave unconnected

I²C and MIPI I3CSM/SPI mode selection

(1:SPI idle mode / I²C and MIPI I3CSM communication enabled;

0: SPI communication mode / I²C and MIPI I3CSM disabled)

Default: input with pull-up

Pull-up is disabled if bit I2C_disable = 1 in register CTRL4_C (13h)

and I3C_disable = 1 in register CTRL9_XL (18h).

SCL

I²C/MIPI I3CSM serial clock (SCL) / SPI serial port clock (SPC)

Default: input without pull-up

SDA

I²C/MIPI I3CSM serial data (SDA) /

SPI serial data input (SDI) /

3-wire interface serial data output (SDO)

Default: input without pull-up

1. INT1 must be set to 0 or left unconnected during power-on if the I²C/SPI interfaces are used.

Internal pull-up value is from 30 kΩ to 50 kΩ, depending on Vdd_IO.

Note:

The procedure to enable the pull-up on pins 2 and 3 is as follows:

1. From the primary I²C/I3C/SPI interface: write 40h in register at address 01h

2. From the primary I²C/I3C/SPI interface: write 08h in register at address 14h (enable the pull-up on pins 2 and 3)

3. From the primary I²C/I3C/SPI interface: write 00h in register at address 01h

ASM330LHB

ASM330LHB electrical connections

DS13773 - Rev 7

page 36/131

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