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PMW3610 PCB
Breakout board for the PixArt PMW3610DM-SUDU, a low-power laser mouse sensor. An alternative to the PMW3360 PCB for low-power applications.
Features:
- Operates at either 1.8V or 3.3V voltage levels.
- Supports both 2.54mm pin headers and 0.5mm-pitch FFC/FPC connectors.
- The optical center of the sensor is located in the center of the PCB.
- Compatible with ZMK projects. Demo video
PCB
Online preview available here, powered by KiCanvas.
BOM
| Ref | Value | Footprint |
|---|---|---|
| C1 | 3.3μF/16V | SMD 0805* |
| C2, C3, C4 | 100nF | SMD 0603 |
| C5, C7 | 10nF | SMD 0603 |
| C6 | 10μF | SMD 0805* |
| C8, C9 | 1μF | SMD 0603 |
| C10 | DNI | SMD 0603 |
| R1 | 10k | SMD 0603 |
| U1 | PMW3610 | 16-DIP |
| U2 | TLV74318* | SOT-23-5 |
| J1 | 2.54mm Pin header | 2.54mm 1x07 |
| J2 | 8P 0.5mm FFC/FPC | AFC01-S08FCA-00 |
- DNI: Do Not Install.
- SMD 0603 (Imperial) aka 1608 Metric; SMD 0805 (Imperial) aka 2012 Metric.
- The PMW3610 must be used with an LM18-LSI lens.
- The
U2LDO (TLV74318) can be replaced with an RT9193-18GB. If using this replacement, setC10to 22nF. - Recommended capacitor specifications:
- Dielectric material: X7R
- Tolerance: +/- 10%
- Rated working voltage: 6.3 ~ 16V
- To accommodate the recommended capacitance values (in μF range),
C1andC6use an 0805 footprint. If the recommended spec aren't critical for your application, you can opt for an 0603 package instead.
Board Characteristics
- Copper layer count: 2
- Board thickness: 1.6 mm
- Board overall dimensions: 23.5 x 31.5 mm
- Min track/spacing: 0.15 mm / 0.15 mm
- Min hole diameter: 0.3 mm
- Castellated pads: No
- Edge card connectors: No
- Plated board edge: No
- Mounting hole: M3 x4
Connector
| Pin | J1 PinHeader | J2 FFC/FPC |
|---|---|---|
| 1 | VIN | GND |
| 2 | GND | VIN |
| 3 | SDIO | nCS |
| 4 | SCLK | -- |
| 5 | nCS | SDIO |
| 6 | MOTION | SCLK |
| 7 | nRESET | MOTION |
| 8 | -- | nRESET |
Power
Voltage Level Config
This circuit is designed with a VDD of 1.8V. VDDIO is the voltage used by the IO pin (e.g. SCLK, SDIO), and can be configured for either 3.3V or 1.8V logic.
Most of the current MCU IOs are 3.3V, please use 3.3V Logic config for this MCU. This board does NOT support 5V logic. If using a 5V MCU, please add a level shifter such as the TXS0108E.
| Config | JP1 | VIN Min. | VIN Max. |
|---|---|---|---|
| 3.3V Logic | [1-2 3] | 3.3V | 3.3V |
| 1.8V Logic | [1 2-3] | 2.1V* | 5.5V |
| LDO Bypass* | [1-2-3] | 1.7V | 2.1V |
- 2.1V = 1.8V + 0.3V, where 0.3V is the dropout voltage of the TLV74318 (at Tj ≤ 125ºC).
- Do not install
U2,C8,C9,C10in the LDO Bypass config.
Jumper
| JP1 | Description | Effect |
|---|---|---|
[1-2 3] | 2 and 1 shorted; 3 NC | VDDIO = VIN |
[1 2-3] | 2 and 3 shorted; 1 NC | VDDIO = VDD = 1.8V |
[1-2-3] | 1, 2 and 3 shorted | VDDIO = VDD = VIN (LDO bypass) |
- NC: Not Connected.
PMW3610 Spec
| Parameter | Min. | Typ. | Max. | Unit |
|---|---|---|---|---|
| VDD | 1.7 | 1.8 | 2.1 | V |
| VDDIO | 1.7 | 1.8 | 3.3 | V |
| SCLK Frequency | 2 | MHz | ||
| Working Distance* | 2.2 | 2.4 | 2.6 | mm |
| Operating Temperature | 0 | 40 | ºC | |
| Resolution | 200 | 3200 | cpi |
- The above table is for reference only.
- Working Distance is the distance from lens reference plane (i.e. the lowest plane of the lens) to tracking surface (e.g. mousepad or trackball).
Axis Direction
The raw data direction is defined as:
- X-axis: Right is positive, left is negative.
- Y-axis: Up is positive, down is negative.
However, the Y-axis of the mouse is typically inverted in the OS because the origin is at the top-left corner of the screen. For this reason, the "invert Y-axis" option is commonly enabled.
Changelog
Firmware
You can use this firmware with the nRF52840 to test whether the PMW3610 PCB is functioning properly.
License
- Hardware: Available under the CERN-OHL-P v2 permissive license.
- Firmware: Licensed under Apache 2.0 as identified by the SPDX in each file.