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TPMC632 User Manual Issue 1.0.6
Page 14 of 49
Configuration
4.4
The FPGA can be configured by the following sources:
•
Platform Flash
•
SPI-Flash
•
JTAG
The configuration flash can be selected with a DIP-switch; alternatively, JTAG configuration is always
available. For the XILINX Platform Flash configuration the Master SelectMAP/BPI mode with 8bit bus width is
used. The SPI-Flash configuration uses the Master Serial / SPI mode. Both flashes could be programmed
via JTAG; the SPI-Flash uses the indirect SPI programming mode.
To change the TPMC632 programming, JTAG-capable hardware is needed (i.e. the Xilinx Platform Cable
USB II).
On delivery the configuration Platform Flash and the User SPI-Flash (USER Flash) are blank.
A second SPI-Flash (TEWS Flash) is factory programmed with the TPMC632 Platform Example Application.
4.4.1 Selecting the Configuration Source
Besides direct JTAG configuration, the TPMC632 provides two user configuration sources: a platform flash
and a SPI-Flash. Both devices share common pins, so a selection must be made. With the Configuration DIP
switch the Configuration source could be selected.
Set the Configuration DIP Switch S1 to ON, the SPI Flash interface is selected, with Configuration DIP
Switch S1 set to OFF the FPGA will configure from the Platform Flash.
Set the Configuration DIP Switch S2 to ON the SPI Flash A (USER Flash) is selected. Set the Configuration
DIP Switch S2 to OFF the SPI Flash B (TEWS Flash) is selected.
MU
X
S1
FPGA
MU
X
S2
SPI A
SPI B
XCF
Figure 4-3 : Configuration Source Selection
After configuration the SPI-Flash A is always user accessible, regardless of the switch setting.
Switch
Signal
Description
S1
ON
Configure FPGA from SPI Flash
OFF
Configure FPGA from Platform Flash
S2
ON
SPI Flash A (USER Flash) selected
OFF
SPI Flash B (TEWS Flash) selected
Figure 4-4 : Configuration DIP-Switch Settings