ICM-20948 Detailed explanation of pin function specifications and circuit principle instructions
The ICM-20948 is a sensor module manufactured by InvenSense (now part of TDK Corporation). It is a multi-axis sensor capable of measuring acceleration, gyroscope, and magnetometer data. The ICM-20948 typically comes in a QFN (Quad Flat No-lead) package, which is a common surface-mount package style.
Regarding your request for a detailed explanation of the pin function specifications and circuit principles, I can break down the pin functions, but it's important to note that the ICM-20948 has a limited number of pins (16 pins in the QFN package, not 200), which means a detailed description of 200 pins is not applicable in this case. I can provide a breakdown of the 16-pin QFN package with detailed explanations for each pin.
Here's a detailed list of the pin functions of the ICM-20948 in a QFN-16 package:
ICM-20948 Pinout (QFN-16 Package)
Pin Number Pin Name Pin Function 1 VDD Power supply input (2.4V to 3.6V) 2 GND Ground pin 3 SDA I2C Data (Bi-directional data line for I2C communication) 4 SCL I2C Clock (Clock line for I2C communication) 5 AD0 I2C Address select (used to select the I2C address) 6 INT Interrupt pin (used to signal events like data ready, errors) 7 ADO Auto-wake-up (wake-up control for low power modes) 8 VDDIOH High voltage power for I/O (usually 3.3V or 1.8V) 9 GND Ground pin 10 CS Chip select (used for SPI interface ) 11 SDO SPI Data Output (MISO - Master In Slave Out) 12 SDI SPI Data Input (MOSI - Master Out Slave In) 13 SCLK SPI Clock 14 VDD Power supply input (for analog circuits) 15 GND Ground pin 16 RESET Reset pin (active low to reset the device)ICM-20948 Pin Function FAQ
1. What is the function of the VDD pin in the ICM-20948? The VDD pin is the power supply input for the ICM-20948. It requires a voltage between 2.4V to 3.6V to operate properly. 2. What does the GND pin do? The GND pin is the ground connection for the device. It is used to complete the electrical circuit. 3. What is the function of the SDA pin? The SDA pin is used for I2C communication. It is the data line for the bi-directional transmission of data between the ICM-20948 and the microcontroller. 4. What is the SCL pin used for? The SCL pin is the clock line for I2C communication. It provides the timing signals to synchronize data transmission. 5. What does the AD0 pin do? The AD0 pin is used to select the I2C address of the ICM-20948. Setting it high or low changes the I2C address. 6. What is the function of the INT pin? The INT pin is an interrupt output. It signals events such as data ready, error detection, or other conditions that the microcontroller needs to respond to. 7. What does the ADO pin do? The ADO pin is used to control the wake-up function of the ICM-20948 in low-power modes. When low, it activates the device from a low-power state. 8. What is the purpose of the VDDIOH pin? The VDDIOH pin provides a higher voltage to the I/O pins of the ICM-20948, usually 3.3V or 1.8V, depending on the system configuration. 9. What is the CS pin used for? The CS pin is used to select the chip for SPI communication. It must be driven low to communicate with the ICM-20948 over SPI. 10. What does the SDO pin do? The SDO pin is the SPI Data Output (MISO) pin. It is used to transmit data from the ICM-20948 to the microcontroller. 11. What is the function of the SDI pin? The SDI pin is the SPI Data Input (MOSI) pin. It is used to send data from the microcontroller to the ICM-20948. 12. What is the purpose of the SCLK pin? The SCLK pin is the SPI Clock pin. It provides the clock signal used to synchronize data transfers in SPI communication. 13. What happens when the RESET pin is triggered? The RESET pin is an active-low input that resets the ICM-20948 device. When triggered, it initializes the device to a known state. 14. Can the ICM-20948 be used with both I2C and SPI? Yes, the ICM-20948 supports both I2C and SPI communication protocols. You can choose between them depending on your system's requirements. 15. How do I select between I2C and SPI communication? The choice between I2C and SPI is made by configuring the CS and SDA/SCL pins appropriately. If you're using I2C, use the SDA and SCL pins. If you're using SPI, connect the CS, SDI, SDO, and SCLK pins. 16. What voltage levels are required for VDD and VDDIOH? The VDD pin should be supplied with a voltage between 2.4V and 3.6V, while VDDIOH typically requires a voltage of either 1.8V or 3.3V, depending on the desired logic level. 17. What does the chip reset do? The RESET pin resets the ICM-20948, clearing all registers and restoring the device to its default configuration. 18. Can I use the INT pin for multiple purposes? The INT pin can be used to signal various interrupt events such as data ready, motion detection, or error flags. You can configure it to trigger specific actions based on the application. 19. Is the ICM-20948 suitable for low-power applications? Yes, the ICM-20948 is designed to support low-power operations and has configurable low-power modes. The ADO pin can help control power states. 20. What is the I2C address of the ICM-20948? The I2C address of the ICM-20948 can be selected using the AD0 pin. The default address is 0x68 when AD0 is tied low and 0x69 when AD0 is tied high.This covers the essential aspects of the ICM-20948's pin functions, including the detailed role of each pin and the most frequently asked questions. Let me know if you need any further clarifications!