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Scroll Title
titleSPI Physical Interfcaces Available
TE0630 (error)TE0300  (tick)
 TE Module SPI busB2B connection
is available?		SPI Header connection
is available?
TE0300 SPI bus(error)(tick)
TE0320 SPI bus(tick)(error)
TE0630 SPI bus(error)(error)


SPI Bus connections

Scroll pdf title
titleSPI Flash and FPGA connection; SPI Flash and USB FX2 microcontroller
TE USB FX2 module typeSPI Bus connections
TE0630TE0300Image Modified
TE0320
TE0300TE0630Image Modified

FPGA SPI Configuration Interface with FX2 microcontroller and SPI Flash

...

FPGA SPI Configuration Interface (CONTROL/STATUS) Pins: PD[3:1]  for every TE USB FX2 module:

  • INIT_B, DONE, FX2_PROG_B ( aka PROG_B (Spartan3E/ASpartan-3E and Spartan-3A) or PROGRAM_B (Spartan6)),Spartan-6).
Info
FX2_PS_EN (PD0) is used to control the signal PS_EN (if the switch FX2_ON is set to on), so it is not really part of the SPI Configuration Interface. The signal PS_EN could enable/disable some power rails.

FPGA SPI Configuration Interface (DATA) Pins

TE0630 module: FPGA Spartan6

SPI_buswidth = 1 (single mode), 2 (dual mode) or 4 (quad mode) are supported by TE0630 module

ISE procedure, for example.

...

TE0300 (Spartan-3E) and TE0320 (Spartan-3A) module

This interface section is common to TE0300 (Spartan-3E) and TE0320 (Spartan-3A) module.

Only SPI_buswidth (for SPI Flash memory) = 1 is supported by TE0300 and TE0320 module.

...

Scroll Title
titleFPGA SPI Configuration Interface (DATA) Pins: PD[7:4] and MISO[3:2] for TE0630for TE0300 and TE0320 module

Pin Name
Schematic

Pin Name FPGA
FPGA Direction		Pin Name FX2
FX2 direction		DescriptionDuring ConfigurationAfter Configuration
 CSO_B

 SPI/S

CSO_B of Spartan-3

Output

PD4

Output when
the FPGA is
powerd off by
spi functions (1) 

Master SPI Chip Select Output
.

Active Low.
Connect to the SPI
Flash PROM’s
Slave Select input
If HSWAPEN_B =1,
connect this signal to VCCO
through pull-up resistor
externally.
User I/O.
Drive CSO_B High
after configuration
to disable the SPI
Flash and reclaim
MOSI, DIN, and
CCLK pins.
Optionally reuse
this pin,
MOSI, DIN,
and CCLK
to continue
communicating
with SPI flash
.

Chip select: When the S# input
signal is HIGH, the device is deselected
and DQ1 is at HIGH impedance.
Unless an internal PROGRAM, ERASE,
or WRITE STATUS REGISTER cycle
is in progress, the device will be in
the standby power mode (not the
DEEP POWERDOWN mode).
Driving S# LOW enables the device,
placing it in the active power mode.
After power-up, a falling edge on S#
is required prior to the start of any
command.

If HSWAP
or PUDC_B =1,
connect this signal
to a 4.7 kΩ
pull-up resistor
to 3.3V.
Drive CSO_B High after
configuration to disable
the SPI Flash and reclaim
the MOSI, DIN, and
CCLK pins. Optionally,
re-use this pin and MOSI,
DIN, and CCLK to
continue communicating
with SPI Flash.
 SPI/C

CCLK

Output

PD5

Output when
the FPGA is
powerd off by
spi functions (1)

Configuration Clock. Generated by
FPGA
CCLK

CCLK

Output

PD5

Output when
the FPGA is
powerd off by
spi functions (1)

 

Configuration clock source
for all configuration modes
except JTAG.
Generated by FPGA
internal oscillator.
Connect to the SPI flash Flash PROM’s
PROM’s Slave Clock input.
Drive SPI Flash’s clock input.User I/O.
Drive High
or Low
if not used.
MOSI/DI

MOSI/DI

Output/Input

Bidirectional

PD6

Output when
the FPGA is
powerd off by
spi functions (1)

 

Master FPGA Serial Data Output
and
Master FPGA Serial Data Input.
Connect to the SPI Flash PROM’s
Slave Data Input pin.

It is used in x1 (single mode),
x2 (dual mode) and x4 (quad) mode.

FPGA sends SPI flash
memory read commands
and starting address to the
PROM’s serial data input.
User I/O

MISO/DO

MISO/DO

Input

PD7

Input, by default (2)

 

Master FPGA Serial Data Input
and Slave SPI flash output.
Connect to the SPI Flash

PROM’s Slave Data Output pin.
It is used in x2 (dual mode) and
x4 (quad) mode.
FPGA receives serial data
from PROM’s serial data
output.
User I/O
MISO2 and
MISO3 aka
MISO[3:2]

MISO3 and
MISO2

Input

NOT CONNECTED

Master FPGA Serial Data Input
and Slave SPI data output.

They are used in x4 (quad) mode.
Used only when using the
fast-read quad output
command.
User I/O

TE0320 and TE0300 module:  FPGA Spartan3A and Spartan3E

Frequency controlled by ConfigRate
bitstream generator option.
If CCLK PCB trace is long or has
multiple connections, terminate this
output to maintain signal integrity.

Clock: The C input signal provides the
timing of the serial interface.
Commands, addresses, or data present
at serial data input (DQ0) is latched on
the rising edge of the serial clock (C).
Data on DQ1 changes after the falling
edge of C.

Drives SPI Flash
PROM’s clock input.
User I/O. Drive High or
Low if not used.
SPI_D

MOSI

Output

PD6

Output when
the FPGA is
powerd off by
spi functions (1)

Master SPI Serial Data Output Connect
to the SPI Flash PROM’s Slave
Data Input pin.

Serial data: The DQ0 input signal is
used to transfer data serially into the
SPI Flash device.
It receives commands, addresses,
and the data to be programmed.
Values are latched on the rising edge
of the serial clock (C).

FPGA sends
SPI Flash memory
read commands
and starting address
to the PROM’s
serial data input.
User I/O

SPI_Q

DIN

Input

PD7

Input, by default (2)

Master SPI Serial Data Input Connect
to the SPI Flash PROM’s Slave Data
Output pin.

Serial data: The DQ1 output signal is
used to transfer data serially out of the
SPI Flash device.
Data is shifted out on the falling edge
of the serial clock (C).

FPGA receives serial
data from SPI Falsh
PROM’s serial data
output.
User I/O

TE0630 (Spartan-6) module

This interface section is used only by TE0630 (Spartan-6) module.

SPI_buswidth (for SPI Flash memory) = 1 (single mode), 2 (dual mode) or 4 (quad mode) are supported by TE0630 module.

ISE procedure, for example.

  1. Open TE USB FX2  project
  2. Generate Programming File -> Process Properties
  3. Configuration options "-g SPI_buswidth" = 1,2 or 4 then Apply and OK
  4. Run "Generate programming file"
  5. Open iMPACT and generate msc from bit
  6. Program mcs to Flash in x1 (single), x2 (dual) or x4 (quad) mode
Scroll Title
titleFPGA SPI Configuration Interface (DATA) Pins: PD[7:4] and MISO[3:2] for TE0630

Pin Name
Schematic

Pin Name FPGA
FPGA Direction

Pin Name FX2
FX2 direction

DescriptionDuring ConfigurationAfter Configuration
 CSO_B

CSO_B

Output

PD4

Output when
the FPGA is
powerd off by
spi functions (1)

 

Master SPI Chip Select Output.
Active Low. Connect to the SPI
Flash PROM’s Slave Select input
If HSWAPEN
Scroll Title
titleFPGA SPI Configuration Interface (DATA) Pins: PD[7:4] for TE0300 and TE0320 module

Only SPI_buswidth = 1 is supported by TE0300 and TE0320 module

Pin Name

SPI

FPGA DirectionFX2 directionDescriptionDuring ConfigurationAfter Configuration

 SPI/S

CSO_B of Spartan3

Output

PD4

Output when
the FPGA is
powerd off by
spi functions (1)

Master SPI Chip Select Output
Active Low.
Connect to the SPI Flash PROM’s
Slave Select input.

Chip select: When the S# input
signal is HIGH, the device is deselected
and DQ1 is at HIGH impedance.
Unless an internal PROGRAM, ERASE,
or WRITE STATUS REGISTER cycle
is in progress, the device will be in
the standby power mode (not the
DEEP POWERDOWN mode).
Driving S# LOW enables the device,
placing it in the active power mode.
After power-up, a falling edge on S#
is required prior to the start of any
command.

If HSWAP
or PUDC_B =1,
connect this signal
to a 4.7 kΩto VCCO
through pull-up resistorto 3.3V
externally.
User I/O.
Drive CSO_B High
after configuration
configuration to disable the SPI
Flash and reclaim
the MOSI, DIN, and
CCLK pins.
Optionally ,reuse
re-use this pin and MOSI,
DIN, and CCLK to
continue communicating
with SPI Flash.
MOSI, DIN,
and CCLK
to continue
communicating
with SPI flash
CCLK

CCLK

Output

PD5

Output when
the FPGA is
powerd off by
spi functions (1)

 

Configuration clock source
for all configuration modes
except JTAG.
Generated by FPGA
internal oscillator.
Connect to the SPI flash
PROM’s Slave Clock input.
Drive SPI Flash’s  SPI/C

CCLK

Output

PD5

Output when
the FPGA is
powerd off by
spi functions (1)

Configuration Clock. Generated by
FPGA internal oscillator.
Connect to the SPI Flash PROM’s
Slave Clock input.
Frequency controlled by ConfigRate
bitstream generator option.
If CCLK PCB trace is long or has
multiple connections, terminate this
output to maintain signal integrity.

Clock: The C input signal provides the
timing of the serial interface.
Commands, addresses, or data present
at serial data input (DQ0) is latched on
the rising edge of the serial clock (C).
Data on DQ1 changes after the falling
edge of C.

Drives SPI Flash
PROM’s clock input.		User I/O.
Drive High
or Low
Low if not used.
SPI_DMOSI/DI

MOSI/DI

Output/Input

Bidirectional

PD6

Output when
the FPGA is
powerd off by
spi functions (1)

 

Master SPI FPGA Serial Data Output Connect
to the SPI Flash PROM’s Slave
Data Input pin.

Serial data: The DQ0 input signal is
used to transfer data serially into the
SPI Flash device.
It receives commands, addresses,
and the data to be programmed.
Values are latched on the rising edge
of the serial clock (C).


and
Master FPGA Serial Data Input.
Connect to the SPI Flash PROM’s
Slave Data Input pin.

It is used in x1 (single mode),
x2 (dual mode) and x4 (quad) mode.

FPGA sends SPI flash
memory
FPGA sends
SPI Flash memory
read commands
and starting address

to the
PROM’s

serial data input.
User I/O

MISO/DO

MISO/DO

SPI_Q

DIN

Input

PD7

Input, by default (2)

 

Master

SPI

FPGA Serial Data Input

Connect


and Slave SPI flash output.
Connect to the SPI Flash

PROM’s Slave Data
Output pin.
Serial data: The DQ1 output signal is
used to transfer data serially out of the
SPI Flash device.
Data is shifted out on the falling edge
of the serial clock (C)
It is used in x2 (dual mode) and
x4 (quad) mode.
FPGA receives serial datadata from SPI Falsh
PROM’s serial data
output.
User I/O

FPGA SPI Configuration Interface (CONTROL/STATUS) Pins

All TE USB FX2 module (TE0630,TE0320,TE0300): FPGA Spartan6, Spartan3A and Spartan3E

title
from PROM’s serial data
output.
User I/O
MISO2 and
MISO3 aka
MISO[3:2]

MISO3 and
MISO2

Input

NOT CONNECTED

Master FPGA Serial Data Input
and Slave SPI data output.

They are used in x4 (quad) mode.
Used only when using the
fast-read quad output
command.
User I/O
Scroll Title

FPGA SPI Configuration Interface (CONTROL/STATUS) Pins

...

This interface section is common to all TE USB FX2 modules (TE0300,TE0320,TE0630): FPGA Spartan-3E, Spartan-3A and Spartan-6.

FX2_PS_EN is used to control the signal PS_EN (if the switch FX2_ON is set to on), so it is not really part of the SPI Configuration Interface.

Scroll Title
titleFPGA SPI Configuration Interface (CONTROL/STATUS) Pins: PD[3:0] for every TE USB FX2 module


Pin Name
Schematic

really part of the SPI Configuration Interface

controlled FX2
microcontroller (FX2 μC) the  μC


power







 


to process


Low reprogram


Flash
The recommendation
for DONE in the
User Guide
is to use a
330Ω
of Tools
μC
from
could





B4).
The recommendationfor INIT in the
User Guide
is to use a
4.7kΩ pull-up
 configuration

of memory







are

.
output CRC the a

Pin Name FPGA
FPGA Direction

Pin Name FX2
FX2 direction

DescriptionDuring ConfigurationAfter Configuration
FX2_PS_EN

NOT

CONNECTED

PD0

Bidirectional
Input/Output (3)

Control of signal PS_EN
if the switch FX2_ON is

set to on.

Some power rails are controlled

by the USB

FX2  microcontroller.
At start-up,

the FX2

microcontroller
switches off some power

rails and
starts up the

module in low-power
mode.
After enumeration,
the

FX2 microcontroller firmware
enables (switches on) the power

rails previously

disabled, if enough
current

is available
from the USB bus.

See  Power Rails

Configuration:

If the switch FX2_ON
is

set to on, FX2_PS_EN
should be High

to allow
configuration

to start.
 

If the switch FX2_ON is
set to on, FX2_PS_EN
should be High to allow
the various components
of TE USB FX2
module

to work.

FX2_PROG_B

PROGRAM_B
( TE0630's
Spartan 6) 

PROG_B
(TE0300's
Spartan 3E)
(TE0320's
Spartan 3A)

Input

PD1

Bidirectional

Input/Output (3)

 

Program FPGA. Active Low.

Active-Low asynchronous

full-chip
reset.

When asserted Low for

500 ns
or longer,

forces the FPGA to

restart its configuration process

by clearing

configuration memory
and

resetting the DONE and
INIT_B pins after

FX2_PROG_B
returns High.

Must be High to allow
configuration to start.

Drive FX2_PROG_B Low

and release to reprogram

FPGA.

Hold FX2_PROG_B

to force
the FPGA I/O

pins into
High-Z, 

allowing direct
programming
access to SPI flash

PROM pins.


 

DONE

DONE

Bidirectional I/O,

Open-Drain,
or Active

Use a pull-up
resistor (330Ω)
on DONE (4).
 
pull-up.


 


 

PD2

Input,
by default (2)

Dedicated Active-High signal
indicating configuration is

complete:

  • 0 = FPGA not configured
  • 1 = FPGA configured
Refer to the BitGen section of
UG628, Command Line Tools
User Guide for
software settings.

See FPGA configuration
process successfully
completes (DONE PIN)
page.

The FX2

microcontroller's
firwmare

is able to read the
DONE PIN status from

PD2 pin (IOD2)

and the host
computer's SW could

obtain the

current value
using
READ_STATUS command. 
DONE PIN status

can be
read from

reply[4]

(= 
EP1INBUF[4] =

sts_booting
=

FPGA_DONE).


INIT_B

INIT_
B 
Open-drain
bidirectional
I/O.
Use a pull-up
resistor (4.7kΩ)
on INIT_B (
4).

PD3

Input,
by default (2)

See AR# 39582 and

AR# 35002

Initialization Indicator.
Active Low.
Goes Low at start of configuration
during
Initialization memory
clearing process.
Released at end

ofmemory clearing, when mode
select
pins are sampled.

The INIT pin does not have

a rise
time requirement and

is

used to
signal the start of

configuration as
well as a

CRC,

and can also be
used as

User-IO post configuration.

 

Active during
configuration.
Before the Mode pins are
sampled,
INIT_B is an input
that
can be held
Low to delay configuration.
If SPI Flash PROM requires
more than 2 ms to awake
after powering
on,hold INIT_B Low until
PROM is ready.
After the Mode pins are
sampled, INIT_B is an
open-drain active-Low output
indicating whether a CRC
error occurred during
configuration:
  • 0= CRC error
  • 1= No CRC error
User I/O. If unused in the
application, drive
INIT_B High to avoid a
floating value.
Dual-Purpose:
if User I/O if
POST_CRC
is not enabled.

 

Note
Only the status of these PD2 pin (FPGA_DONE) could be retrieved using the READ_STATUS command. If the user desire to retrieve the status of the other pins as well, he/she should modify the firmware to add another FW API similar to READ_STATUS command. Theoretically the user/developer should add another case in the switch construction inside the function ep1_pool(void) (described in te_api.c).

...

Code Block
languagecpp
titlespi.c, TE USB FX2 firmware v3.02
OED = 0x73;       // 0b01110001; => PD6,PD5,PD4,PD0 pins output enabled;
FPGA_POWER = 0;   // power off fpga

(2) See For default direction of pin, see table 10 ("FX2LP Pin Descriptions") of the document "EZ-USB® FX2LP™ USB Microcontroller High-Speed USB Peripheral Controller" (link).

...