Sensor modules

AXS-018 — ICM-20602 high-rate 6-axis IMU PMOD module

Catalog #18 in the AruviX sensor line, level L4 (high-rate SPI streaming). Uses the ICM-20602 instead of the catalog's original ICM-42688-P, which has no stock KiCad symbol/footprint; the ICM-20602 is the same 32 kHz-gyro-class, FIFO-streaming TDK part, so the streaming/DMA curriculum is unchanged.

Level L4 ERC clean DRC clean Fab package 9 components

3D render of the AXS-018 PCB — Rendered from the PCB layout. No physical board has been manufactured.

Circuit review & bench-test guide →

Components#

Every placed component, with the reason it is on the board. Extracted directly from the schematic, so this cannot drift from the design.

Ref	Value	What it does on this board	Part number	Footprint
`C1`	100nF 16V X7R	VDD decoupling	`GRM188R71C104KA01D` Murata	`C_0603_1608Metric`
`C2`	100nF 16V X7R	VDDIO decoupling	`GRM188R71C104KA01D` Murata	`C_0603_1608Metric`
`C3`	2.2uF 10V X5R	Module bulk decoupling	not selected Murata	`C_0603_1608Metric`
`C4`	100nF 16V X7R	REGOUT internal-regulator bypass per datasheet	`GRM188R71C104KA01D` Murata	`C_0603_1608Metric`
`J1`	PMOD PLUG 2x6	PMOD peripheral plug (Digilent spec 1.2)	not selected generic	`PinHeader_2x06_P2.54mm_Horizontal`
`R1`	100R	Series protection on the sensor-driven MISO line	`RC0603FR-07100RL` Yageo Datasheet ↗	`R_0603_1608Metric`
`R2`	100R	Series protection on the sensor-driven INT1 line	`RC0603FR-07100RL` Yageo Datasheet ↗	`R_0603_1608Metric`
`R3`	10k	~CS idle pull-up so an unconfigured host cannot drop the part into I2C mode	`RC0603FR-0710KL` Yageo Datasheet ↗	`R_0603_1608Metric`
`U1`	ICM-20602	High-performance 6-axis IMU, 3-axis gyro + 3-axis accel, SPI/I2C, 1 kB FIFO	`ICM-20602` TDK InvenSense Datasheet ↗	`LGA-16_3x3mm_P0.5mm_LayoutBorder3x5y`

Signals#

Net labels used in the schematic, which are also the names the HDL top level should use.

3V3 CS_N GND IMU_INT1 IMU_SDO INT1 MISO MOSI REGOUT SCK

Production status#

Schematic ERC	0 violations
PCB layout	complete
DRC	0 violations
Fab package	exported (24 gerbers + drill + CPL + BOM)
Fabricated	no — design stage only

Source: boards/sensor-modules/axs-018-icm20602

Catalog #18 in the AruviX sensor line (../README.md), level L4 (high-rate SPI streaming). Uses the ICM-20602 instead of the catalog's original ICM-42688-P, which has no stock KiCad symbol/footprint; the ICM-20602 is the same 32 kHz-gyro-class, FIFO-streaming TDK part, so the streaming/DMA curriculum is unchanged.

Status: schematic generated, ERC clean (0/0), netlist reviewed. PCB layout not started. Not released.

What it teaches#

Sustained high-rate SPI streaming: 32 kHz gyro sample class, the 1 kB FIFO, watermark interrupts, and moving samples into fabric buffers faster than a polled register loop can.

Design#

ICM-20602, LGA-16 3×3 mm. VDD and VDDIO both on 3V3, 100 nF each, plus a 2.2 µF bulk capacitor (Murata X5R 0603; exact orderable MPN marked TBD-confirm in the BOM fields).
REGOUT (internal regulator) bypassed with 100 nF to GND per datasheet; FSYNC tied to GND (unused input); RESV pin left open (no-connect typed in the stock symbol, per datasheet).
10 kΩ pull-up on ~CS; sensor-driven MISO and INT1 pass through 100 Ω series resistors.

PMOD pin	1	2	3	4	5	6	7	8	9	10	11	12
Net	~CS	MOSI	MISO	SCK	GND	3V3	INT1	NC	NC	NC	GND	3V3

SPI mode 0 or 3, max 10 MHz.

Regenerate#

python3 generate_design.py

Remaining for release#

[ ] Confirm the 2.2 µF bulk capacitor orderable part (GRM188R61A225KE34D)
[ ] PCB layout (20 × 25 mm outline), DRC, fab outputs
[ ] hdl/: SPI master + FIFO streamer, watermark IRQ handler, testbench, ECP5 demo
[ ] BOM export and availability check, design-review checklist