MyPi Integrator Board Option Link Configuration
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