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IIS2ICLX Datasheet(PDF) 30 Page - STMicroelectronics |
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IIS2ICLX Datasheet(HTML) 30 Page - STMicroelectronics |
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30 / 119 page  The procedure to correctly initialize the device is as follows: 1. INT1: Leave unconnected or connect with external pull-down during power-on. Pull-up must be avoided on this pin. 2. INT2: Recommend to not connect with external pull-up. 3. Properly configure the device: a. SPI interface: I2C_disable = 1 in CTRL4_C (13h) and DEVICE_CONF = 1 in CTRL9_XL (18h). b. I²C interface: I2C_disable = 0 (default) in CTRL4_C (13h) and DEVICE_CONF = 1 in CTRL9_XL (18h). Table 16. Internal pin status Pin # Name Mode 1 function Mode 2 function Pin status mode 1 Pin status mode 2 1 VDD_IO Power supply for I/O pins (recommended 100 nF filter capacitor) 2 CS I²C/SPI mode selection (1:SPI idle mode / I²C communication enabled; 0: SPI communication mode / I²C disabled) Default: input with pull-up. Pull-up is disabled if bit I2C_disable = 1 in reg 13h and DEVICE_CONF = 1 in reg 18h. Default: input with pull-up. Pull-up is disabled if bit I2C_disable = 1 in reg 13h and DEVICE_CONF = 1 in reg 18h. 3 GND 0 V supply 4 INT2 Programmable interrupt 2 (INT2) / Data enable (DEN) Programmable interrupt 2 (INT2)/ Data enable (DEN)/ I²C master external synchronization signal (MDRDY) Default: output forced to ground Default: output forced to ground 5 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 reg 02h. Default: input without pull-up. Pull-up is enabled if bit SDO_PU_EN = 1 in reg 02h. SA0 I²C least significant bit of the device address (SA0) 6 INT1 Programmable Interrupt 1 (INT1) Default: input with pull-down(1) Default: input with pull-down(1) 7 SDx Connect to GND or VDD_IO I²C serial data master (MSDA) Default: input without pull-up. Pull-up is enabled if bit SHUB_PU_EN = 1 in reg 14h in sensor hub registers. Default: input without pull-up. Pull-up is enabled if bit SHUB_PU_EN = 1 in reg 14h in sensor hub registers. 8 VDD Power supply (recommended 100 nF filter capacitor) 9 VDD Power supply (recommended 100 nF filter capacitor) 10 SCL I²C serial clock (SCL) / SPI serial port clock (SPC) Default: input without pull-up Default: input without pull-up 11 SDA/SDI I²C serial data (SDA) SPI serial data input (SDI) 3-wire interface serial data output (SDO) Default: input without pull-up Default: input without pull-up 12 SCx Connect to GND or VDD_IO I²C serial clock master (MSCL) Default: input without pull-up. Pull-up is enabled if bit SHUB_PU_EN = 1 in reg 14h in sensor hub registers. Default: input without pull-up. Pull-up is enabled if bit SHUB_PU_EN = 1 in reg 14h in sensor hub registers. 13 GND GND 14 NC Connect to GND or leave unconnected 15 NC Connect to GND or leave unconnected 16 NC Connect to GND or leave unconnected 1. INT1 must be set to 0 or left unconnected during power-on. IIS2ICLX IIS2ICLX electrical connections in mode 2 DS13005 - Rev 7 page 30/119 |
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