ICM-20602
4.12 FIFO
The ICM-20602 contains a 1 KB FIFO (FIFO depth 1008 bytes) register that is accessible via the Serial Interface. The FIFO
configuration register determines which data is written into the FIFO. Possible choices include gyro data, accelerometer data,
temperature readings, and FSYNC input. A FIFO counter keeps track of how many bytes of valid data are contained in the FIFO. The
FIFO register supports burst reads. The interrupt function may be used to determine when new data is available.
The ICM-20602 allows FIFO read in low-power accelerometer mode. A programmable FIFO watermark is included, with data-ready
interrupt triggered when the watermark is reached.
4.13 INTERRUPTS
Interrupt functionality is configured via the Interrupt Configuration register. Items that are configurable include the INT and DRDY
pins configuration, the interrupt latching and clearing method, and triggers for the interrupt. Items that can trigger an interrupt are
(1) Clock generator locked to new reference oscillator (used when switching clock sources); (2) new data is available to be read (from
the FIFO and Data registers); (3) accelerometer event interrupts; (4) FIFO watermark; (5) FIFO overflow. The interrupt status can be
read from the Interrupt Status register.
For further information regarding interrupts, please refer to sections 8 and 9 of this document.
4.14 DIGITAL-OUTPUT TEMPERATURE SENSOR
An on-chip temperature sensor and ADC are used to measure the ICM-20602 die temperature. The readings from the ADC can be
read from the FIFO or the Sensor Data registers.
4.15 BIAS AND LDOS
The bias and LDO section generates the internal supply and the reference voltages and currents required by the ICM-20602. Its two
inputs are an unregulated VDD and a VDDIO logic reference supply voltage. The LDO output is bypassed by a capacitor at REGOUT.
For further details on the capacitor, please refer to the Bill of Materials for External Components.
4.16 CHARGE PUMP
An on-chip charge pump generates the high voltage required for the MEMS oscillator.
4.17 STANDARD POWER MODES – UPDATE THE POWER MODES
The following table lists the user-accessible power modes for ICM-20602.
Mode
Name
Sleep Mode
Standby Mode
Gyro
Off
Accel
Off
1
2
3
4
5
6
7
8
Drive On
Off
Off
Off
Duty-Cycled
Accelerometer Low-Power Mode
Accelerometer Low-Noise Mode
Gyroscope Low-Power Mode
Gyroscope Low-Noise Mode
6-Axis Low-Noise Mode
6-Axis Low-Power Mode
On
Off
Off
On
On
Duty-Cycled
On
On
Duty-Cycled
Table 11. Standard Power Modes for ICM-20602
Notes: Power consumption for individual modes can be found in section 0
Document Number: DS-000176
Revision: 1.0
Page 22 of 57
Revision Date: 10/03/2016
TDK [ TDK ELECTRONICS ]
