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3.10.2
FTDI Port B Configuration
FTDI_MODE1
FTDI_MODE0
FPGA_MODE
FPGA_PROG#
Configuration
(BCBUS6)
(BCBUS5)
(BCBUS4)
(BCBUS3)
0
0
1
HiZ (1)
Slave serial configuration via FTDI
0
1
X
X
FTDI device pins connected to
module I2C bus
1
0
0
0
QSPI flash programming via FTDI
X
1
0
HiZ (1)
Master serial configuration (FPGA
is configured from QSPI flash)
1
1
X
HiZ (1)
FTDI device pins connected to
FPGA UART pins
Table 35: FTDI Configuration Settings - Port B
The control signals FTDI_MODE0 and FTDI_MODE1 are used to configure the way BDBUS0-3 pins are routed
on the module: to UART, I2C, QSPI flash or FPGA SPI configuration port.
Please note that for the QSPI flash programming, FPGA_PROG# must be pulled to ground. For the slave
serial configuration FPGA_MODE must be pulled high or left open, while for master serial configuration
FPGA_MODE must be pulled low.
On revision 1 modules, the “Slave serial configuration” mode and “QSPI flash programming” mode were in-
verted with respect to the value of FTDI_MODE1 signal (i.e. on revision 1 modules, a value of 1 for FTDI_MODE1
means QSPI flash programming, a value of 0 means slave serial configuration). The other control signals are
used in the same way on all revisions.
Warning!
After FPGA slave serial configuration or QSPI flash programming operations, the FTDI_MODE0 signal
must be pulled high, to avoid damaging the equipped FPGA device.
Warning!
Do not connect FPGA_MODE directly to GND on the base board, as this will not allow FPGA slave serial
configuration.
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Version 06, 25.07.2019