EVB-USB5734 Datasheet, PDF (22/37 Pages) Microchip Technology – EVB-USB5734 Evaluation Board User’s Guide

FIGURE 3-2:
IO MODE 2 DAUGHTER CARD
3.1.3 Mode 3: USB Speed LEDs Mode
The Mode 3 IO daughter card configures the USB5734 IO signals to indicate USB
Speed status. Once inserted onto the EVB-USB5734, the “3V3” Power LED should
turn on green. An SMBus header J14 is provided for accessing the SMDAT and
SMCLK signals of the USB5734 while in USB Speed LEDs Mode. Additionally, the
GPIO4/GPIO5 headerJ28 can be used in this mode to access the digital RX and TX
UART signals. When accessing these signals, the J27 header must be left open and
the J5 header must have a shunt placed across pins 2 and 3.
There are five speed LEDs on this daughter card that are labeled “P0” to “P4” which
correspond to downstream Port 0 to Port 4. When a USB device is connected to a USB
downstream port, the LED color will indicate the bus speed for the corresponding USB
port: yellow indicates USB 2.0 and blue indicates USB 3.0. If there is no downstream
device connected, the corresponding LED will be turned OFF.
FIGURE 3-3:
IO MODE 3 DAUGHTER CARD
3.1.4 Mode 4: GPIO Mode
Mode 4 is the default IO configuration for the EVB-USB5734. There is no daughter card
for Mode 4 operation. For the USB5734 to be set into GPIO Mode, a jumper needs to
be placed across pins 19 and 20 on the 2x10 IO connector J7. When in GPIO mode,
the programmable function pins of the USB5734 are set to TBD status. This mode is
used for implementations that use the external SPI ROM and allows for custom config-
urations. The GPIO4/GPIO5 headerJ28 can be used in this mode to access the digital
RX and TX UART signals. When accessing these signals, the J27 header must be left
open and the J5 header must have a shunt placed across pins 2 and 3.
 2015 Microchip Technology Inc.
DS50002350B-page 22