CYUSB3KIT-001 EZ-USB FX3 Development Kit Guide, Doc. #: 001-70237 Rev. *C
73
Hardware
As shown in
Figure 4-7
, a jumper J125 can be inserted to enable the VIO1 (1.8 V, 2.5 V, and 3.3 V –
see
Table 4-1
) power to the Samtec connector (GPIF II interface). Similarly, J156 can be used to
connect power to the Samtec connector.
The CTRL_4 line can be routed either to the J77A Samtec connector (as a GPIF II interface I/O line)
or it can be used to enable or disable the on-board USB switch. As explained in
USB Receptacle on
page 66
, the J100 jumper can be used to control the OTG power.
Figure 4-8
shows how the
selection for pin2-CTL4_SW is made.
Figure 4-8. CTRL_4 Selection Jumper
As shown in
Figure 4-8
, if a jumper connects J100 pins 1 and 2, the CTRL_4 line connects to the
GPIF II interface on the Samtec connector (J77A). If pins 2 and 3 are connected with a jumper, the
CTRL_4 line routes to the USB switch (U8) for OTG power control (VBUS).
4.4.1
Interconnecting to the GPIF II Connector
You can connect the external processor board to the FX3 device using an interconnection board that
mates with the Samtec expansion connector J77. The mating connector is a QTH-060 series
Samtec connector. The following figures show the clearances and location of the Samtec connector
on the FX3 DVK board. Note that these dimensions apply only to Rev 02 and Rev 03 releases of the
DVK board.
Figure 4-9
shows the clearances between the Samtec connector and nearby components. The white
colored outline on the J77 connector is the outline of the connector body.
62
D29_UART-CTS
GPIO[47]
40
D30_UART-TX
GPIO[48]
64
D31_UART-RX
GPIO[49]
95
I2S-CLK
GPIO[50]
93
I2S-SD
GPIO[51]
91
I2S-WS
GPIO[52]
90
I2S-MCLK
GPIO[57]
88
I2C-SCL
GPIO[58]
86
I2C-SDA
GPIO[59]
Table 4-4. FX3 GPIF II Signal Pinout on Samtec Connector
(continued)
Connector J77 Pin No.
FX3 Signals
GPI/O
CTL4_SW
CTL4_LT
CTL4
{3}
J100
J100
1
2
3
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