Orchard validation matrix
Validation Matrix
| Subsystem | basic status | extended status | notes |
|---|---|---|---|
| Kinetis-W CPU | OK | basic SWIO functions OK, OS operational | |
| WS2812B driver | OK | confirmed CPU has GPIO performance to operate on-board LEDs; extended chain testing TBD | |
| I2C | OK | OK | |
| SPI | OK | OK | |
| OLED | OK | ||
| UART | OK | Works well enough for chibiOS | |
| Integrated radio | OK | ||
| BLE | OK | ||
| Accelerometer | OK | ||
| Microphone | ECO1 / OK | OK | Schematic symbol mirrored; requires board respin. Tested OK on EVT1b |
| MPR121 | OK | OK | |
| Jog dial + buttons | OK | OK | |
| GPIO expander | OK | OK | |
| Fancy battery charger | OK | OK | |
| Shipping state power | OK | OK | immeasurable leakage when in "ship mode" e.g. soft battery disconnect state |
| Gas gauge | OK/ECO3 | OK | gas gauge itself works fine, talks on I2C; but topological position is incorrect and requires ECO3 to be effective |
| USB charging port | OK | ||
| USB charging port OC protect | |||
| Cheesy battery charger option | N/A | not populated in EVT1 | |
| Cheesy battery level option | N/A | not populated in EVT1 | |
| On-state power characterization | OK | ||
| Standby power characterization | OK |
Power Consumption
As measured while on battery, ~3.9V through test. ~27 degrees C ambient temperature, 70% RH
- Powered on, 16 LEDs running wave-rainbow at default brightness: 78-79mA
- Halted (debug mode) 16 LEDs frozen on wave-rainbow: 76.5mA
- Captouch off: 76.5mA (not measurable reduction)
- LEDs off: 40mA
- Accel off: 39.8mA
- BLE off: 33.1mA
- OLED off: 58.7mA
- Boost off: 25.3mA
- gpiox off: 25.3mA
- PEE-PBE: 22.7mA
- PBE-FBE: 22.1mA
- FBE-FEI: 21.5mA
- Radio off, CPU halted: 3.0mA
Alt-order:
- Halted, everything on: 77.5mA
- Captouch off: 77.4mA
- LEDs off: 40mA
- Accel off: 39.9mA
- BLE off: 33.1mA
- Boost off: 33.2mA
- OLED off: 24.7mA
- gpiox off: 25.3mA or 24.6mA?
- PEE-PBE: 22.7mA
- PBE-FBE: 22.1mA
- FBE-FEI: 21.4mA
- Radio stop: 3.0 mA
- CPU to VLLS0: 0.6mA
Ship mode:
- 0.09mA - 0.130mA leakage (no hibernate instruction to gas gauge)
No difference when hibernation instruction is given to gas gauge.
Conclusions:
- VLLS0 stop on Cortex-M0+ should be around 0.0003mA
- So, there is about 0.5mA leakage in the system. This is probably about right, given that the accelerometer, captouch, BLE are still powered up but simply in standby, and also the LDO will have some draw as well. My guess is that if there is stray resistance it's accounting for < 50% of the current leakage budget.
Battery life estimates
With 1200mAh battery:
- 16 LEDs on a modest pattern will last 14 hours
- LEDs off, but OLED, BLE on: ~30 hours
- VLLS0 sleep will last 2000 hours (80 days)
- Ship mode will last ~10,000 hours (~1 year)
With 4000mAh battery:
- 16 LEDs on a modest pattern - 47 hours (~2 days)
- LEDs off, but OLED, BLE on: 100 hours (~4 days)
- VLLS0 sleep: 6,500 hours (9 months) -- this is about self-discharge rate anyways, so probably half this duration
- Ship mode: 30,000 hours (~3.8 years) -- in reality, self-discharge is faster than this.
