EVB-USB7056 Evaluation Board User’s Guide
DS50002887A-page 22
2019 Microchip Technology Inc.
3.1.8
Spare GPIOs
The EVB-USB7056 includes a six-channel buffer IC that drives six spare LEDs for gen
-
eral debug or development use. The inputs of these buffers are pinned out to J7 1x6
header. These header pins can be connected to any other board signal via fly wires.
The locations of these components are shown in
.
FIGURE 3-9:
SPARE LEDS
3.1.9
USB-to-SMBus/I
2
C Master
An SMBus/I
2
C slave interface is available for hub configuration in CFG_STRAP1 mode
2 only. Pull-up resistors must be sensed by the hub at power-on in order for the
SMBus/I
2
C slave interface to be active. If both SDA and SCL are not sensed as high
upon power-on/reset, the SMBus/I
2
C slave interface is disabled in the hub. Install a
shunt across J28. The locations of these headers are shown in
.
FIGURE 3-10:
USB-TO-SMBUS/I
2
C MASTER HEADER LOCATIONS
LEDS
D2, D4, D5, D6, D8, D9
Spare LEDs
header J7
PF26 – Clock
(J23-1)
PF27 – Data
(J23-3)
GND
(J23-2)
Install shunt to
enable pull-up
resistors (J28)
