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Scroll pdf title
titleSPI bus topology.

Image AddedImage Removed
 


SPI signals on the TE0630 are listed and described in the table below.

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SPI pins on B2B connector J5 cannot be used as GPIOs (general purpose I/Os).
Scroll pdf title
titleSPI pin-out summary; SPI signal details (bank 2).

nameFPGA ball

FPGA pin

J5 pin

SPI_Q 

IO_L03N_2

no

SPI_D

 

IO_L16N_2

no

SPI_/C

 

IO_L26N_2

no

SPI_/S

 

IO_L01P_2

no

Warning


 

The SPI bus can be used during configuration and operation in a plurality of ways as summarized respectively in Table A (SPI bus for configuration) and Table B (SPI bus for operation).

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Scroll pdf title
titleTable A: SPI bus modes for configuration.
off
(S3 = FX2PON, FX2_PS_EN = 0)master
(

description

usage

EZ-USB FX2LP

FPGA

B2B J5

serial Flash

EZ-USB â-º Flash

OpenFUT
API

master

off
(S3 = FX2PON,
FX2_PS_EN = 0)

deselected

slave

FPGA â—„ Flash

OpenFUT
API

inactive
SPI_* = Z

master
(SPI_/S = 1)

deselected

slave

B2B J5 â-º Flash

custom

inactive
SPI_* = Z

SPI

...

slave

The PROM file (containing the FPGA configuration bitstream) can be written to the SPI serial Flash memory (slave) also through the SPI pins of B2B connector J5 (attached device set to master mode). In this case, the FPGA shall be turned off or three-stated to release its shared SPI pins and the USB FX2 microcontroller shall three-state (Z = high impedance) its shared SPI pins.

SPI bus for operation

A plurality of usage combinations of the SPI bus during operation is made available to the user as suggested in Table B below.

Scroll pdf title
titleTable B: SPI bus modes for operation.

SPI_/C = Zdeselected

description

usage

EZ-USB FX2LP

FPGA

B2B J5

serial Flash

EZ-USB â—„â-º Flash

custom

master

off
(S3 = FX2PON,
FX2_PS_EN = 0)

deselected

slave

FPGA â—„â-º Flash

custom

inactive
SPI_* = Z

master
(SPI_/S = 1)

deselected

slave

B2B J5 â—„â-º Flash

custom

inactive
SPI_* = Z

off
(S3 = FX2PON,
FX2_PS_EN = 0)

master
(SPI_/S = 0)

slave

EZ-USB â—„â-º B2B J5

custom

master
SPI_/S = 1off
(S3 = FX2PON,
FX2_PS_EN = 0)

slave

deselected

EZ-USB â—„â-º B2B J5

custom

slave

off
(S3 = FX2PON,
FX2_PS_EN = 0)

master
(SPI_/S = 1)

Warning
Other combinations of master and slave units are neither supported nor recommended.