SIS Documentation
SIS3153
VME interface
Page 29 of 38
J126 USB Controller FX3 UART interface
The UART interface can be used for debugging of the USB FX3 controller software (used by
Struck) and to force the USB FX3 controller to boot with a “Cypress default bootloader”. This
is necessary to reload a new FX3 images (Struck bootloader) into the FX3-Flashprom.
(SIS3153 V1 / SN001...005 only)
Normal operation (FX3 starts with a Struck bootloader after PowerUp) : open
Force the FX3 to start with a “Cypress default bootloader”: Jumper between TX and RX