Schematics checklist
Reading time : 3 minutes
Published on 18 Jun 2020 - Updated on 05 Dec 2020
| Document | Category | Item |
|---|---|---|
| Schematics | General | Component symbol is correct versus manufacturer datasheet |
| Schematics | General | NC pins are correctly handled |
| Schematics | Power | Power supplies pins are connected to the right voltage |
| Schematics | Power | Quiet / Analog power rails have a PI filter (Capacitor, Ferrite, Capacitor) |
| Schematics | Power | There is 1x 100nF capacitor per Power pin |
| Schematics | Power | Power sequencing on Power Up is correct |
| Schematics | Power | Power sequencing on Power down is correct |
| Schematics | Power | Power sequencing when entering sleep mode is correct |
| Schematics | Power | Power sequencing when escaping sleep mode is correct |
| Schematics | Power | There is no shunt at regulator input or output |
| Schematics | Reset | Check that there is a pull up resistor on reset signal |
| Schematics | Reset | Reset sequencing on Power Up is correct |
| Schematics | Reset | Reset sequencing on Power down is correct |
| Schematics | Reset | Reset sequencing when entering sleep mode is correct |
| Schematics | Reset | Reset sequencing when escaping sleep mode is correct |
| Schematics | Reset | All IC can be reset either at power On or using CPU GPIO |
| Schematics | Configuration | Configuration is written on schematics (DDR spec, CPU Frequency, Ratios, L2 cache …) |
| Schematics | Configuration | Check that sample at reset resistors have the right value |
| Schematics | Configuration | Check that sample at reset resistors are at the right voltage |
| Schematics | GPIO | Check that GPIO pins are at the right voltage |
| Schematics | GPIO | Check GPIO pins directions are correct on schematics |
| Schematics | GPIO | Check that each GPIO is capable of Input or Output |
| Schematics | GPIO | Check that if a special hardware fonction is required, it is available (blink, SATA activity, …) |
| Schematics | Connector | Pin#1 is indicated on schematics |
| Schematics | Connector | Connector name is written on schematics |
| Schematics | Connector | Check connectors pinout |
| Schematics | PCB | PCB revision is written inside schematics |
| Schematics | PCB | PCB reference is written inside schematics |
| Schematics | Analog | Check that calibration resistor value and tolerance is correct |
| Schematics | Crystal | Check that capacitor load value is correct |
| Schematics | Crystal | Check that crystal frequency, tolerance and jitter are correct |
| Schematics | Crystal | Check if crystal needs some resistive load |
| Schematics | Differential pair | Signal polarity is correct |
| Schematics | Differential pair | There is one pair of serial 0402 capacitor |
| Schematics | IC | Check Chip address/ID is available on schematics |
| Schematics | Led | All leds and buttons backlight can be controlled by software |
| Schematics | Led | Check that LED are connected to hardare capable pins (Blink, HDD Activity, …) |
| Schematics | Led | Check default state |
| Schematics | Led | Check Led colors |
| Schematics | Button | Check button RC delay < 20ms |
| Schematics | Button | Check button can trigger an IRQ |
| Schematics | Button | Check hardware associated functions (wake up) |
| Schematics | GPIO | Check hardware associated functions (wake up, shutdown) |
| Schematics | GPIO | Check GPIO PCBA identification |