MyPi Base Board Links

MyPi Board Links

 

J6            Push On link - USB Slave Boot Select (Programming mode)

Jumper Positions:

1-2 = USB SLAVE BOOT ENABLED

2-3 = USB SLAVE BOOT DISABLED

 

LK8           3-Way Push on Link – Green Status LED 1 Drive Source

Jumper Positions:

1-2 = GPIO36

2-3 = MODEM/WIFI ACTIVITY LED SIGNAL

 

LK4         Push On Link – RTC Battery Back up

Fit to connect RTC VBAT to battery, shipped not fitted

 

LK9        Push On Link  

Fit to pull DTR RS232 line to +5V (default fitted)

 

LK10      Push On Link – SD Card Disable

Fit to disable and power off SD Card interface

 

LK11        SMT Link

Short pads to link J1 Pin 2 (Power In Connector) to GPIO20 for use with PSU/power off overlay

 

LK2         Push On Link - Reset

Make link temporarily (or fit switch) to reset CPU module

 

LK12         Push On Link - Emergency Modem Reset Line

Make this link to allow GPIO23 to control PERST line of the mPCIe socket (pin 22)

** Set GPIO23 HIGH to pull reset line low **

 

Board Configuration Options

 

J2/3        SMT Link – 1.8V DC/DC converter Input

J2 = 1.8V Derived from DC-IN (Default)

J3 = 1.8V Derived from +5V Rail

**** DO NOT SHORT BOTH J3 & J2! ****

 

LK1/LK3/LK5       2W SMT Links – External Watchdog Enable

Short links to enable usage of U5 External watchdog (STWD100PYW83F) - Doing so removes usage of CAM0

TP16/LK3/GPIO28 = WDI (1K8 PU)

LK5/GPIO29 = /WDEN (1K8PU) switch GPIO29 to output and drive low to enable watchdog

LK1 = short to connect WDO to CPU reset line

 

 

 

 

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