Designing Hardware for QuickUSB
FX2128
Pin
QUSB2
Pin
Name
Dir
Desc
Function
113 68 PE5
/
CONF_DO
NE / MISO
I/O
Port E, Bit 5
Multifunction Pin
PE5 (default) is a bi-directional
general purpose I/O port. Enabled
when SETTING_FIFO_CONFIG[1:0]
='00', '10', or '11'
CONF_DONE is the Done output
signal for serial FPGA configuration.
Automatically switches functionality
when using the FPGA configuration
commands.
MISO is the Master-In Slave-Out data
signal for the SPI port. Automatically
switches functionality when using the
SPI commands.
114
70
PE6 / nSS0
I/O
Port E, Bit 6
Multifunction Pin
PE6 (default) is a bi-directional
general purpose I/O port. Enabled
when SETTING_FIFO_CONFIG[1:0]
='00', '10', or '11'
nSS0 is the active low slave select
signal for Address 0 of the SPI port.
Automatically switches functionality
when using the SPI commands.
Note: If using nSS0-nSS1, PE6 and
PE7 convert to SPI slave select
functionality, so ensure that PE6 and
PE7 are not used for GPIO if using
SPI nSS0-nSS1.
115 72 PE7
/
GPIFADR8
/ nSS1
I/O
Port E, Bit 7
Multifunction Pin
PE7 is a bi-directional general
purpose I/O port. Enabled when
SETTING_FIFO_CONFIG[1:0] ='00',
or '11'
GPIFADR8 (default) is a GPIF
address output pin. Enabled when
SETTING_FIFO_CONFIG[1:0] ='10'
nSS1 is the active low slave select
signal for Address 1 of the SPI port.
Automatically switches functionality
when using the SPI commands. See
Note for nSS0.
36
73
SCL
Output Clock for I2C
interface
Clock for I2C Interface. Connect to
VCC with a 2.2K resistor, even if no
I2C peripheral is attached. Connected
to VCC with 2.2K resistor on
QuickUSB Module.
37
75
SDA
OD
Data for I2C
interface
Data for I2C Interface. Connect to
VCC with a 2.2K resistor, even if no
I2C peripheral is attached. Connected
to VCC with 2.2K resistor on
QuickUSB Module.
29 77 T0 Input
Input
for
Timer0
Active High Input to Timer0. Not
needed for general operation.
30 78 T1 Input
Input
for
Timer1
Active High input to Timer1. Not
needed for general operation.
31 N/A T2 Input
Input
for
Timer2
Active High input to Timer2.
Connected to VCC through 2.2k
resistor on QuickUSB Module.
QuickUSB Pin Definitions
31
