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TE0630 is provided with a Dip switch S1B.
Dip switch S1B conditions the value of signal PS_EN.
In this way, S1B conditionally/unconditionally enables the power rails 1.2 V, 1.5 V and 2.5 V power rails.
Figure 33: Dip switch S1B (angle view).Image Removed
Figure 34: .

Please note the 4 switch labels are on one side and the <ON> label is on the opposite side.

DIP slide switches S1[A:D] condition the value of some system signals as described in the table below.

Scroll pdf title
titleDip switch S1[A:D]. The switch S1B is the one with label 2 and B
Image Added
Scroll pdf title
titleDip switch S1B schematic.

...

Image Added
Scroll pdf title
titleWhen S1B = FX2 PON,

...

PS_EN

...

=FX2_PS_EN

...

Image Added

When S1B is turned off  (open) (FX2 PON position), the 1.2 V, 1.5 V and 2.5 V power rails are controlled by the USB (EZ-USB FX2LP USB FX2) microcontroller. At start-up, the USB microcontroller switches off the power rails 1.2 V, 1.5 V and 2.5 V power rails and starts up the module in low-power mode. After enumeration, the USB microcontroller firmware enables (switches on) the power rails 1.2 V, 1.5 V and 2.5 V power rails on, if enough current is available from the USB bus.

When S1B is turned on (closed) (PON position), the power rails 1.2 V, 1.5 V and 2.5 V power rails are always enabled (switched on).

Scroll pdf title
titleDip switch S1B settings overview (power rails 1.2 V, 1.5V and 2.5 V only).

S1B position

Default position

Effect on 1.2 V, 1.5 V

...

and 2.5 V rails

FX2 PON (off

...

) 

(tick)

Power rails 1.2 V, 1.5 V and 2.5 V

...

controlled by USB FX2 microcontroller (signal FX2_PS_EN)

PS_EN = FX2_PS_EN = 1 or 0

PON (on

...

)

(error)

Power rails 1.2 V, 1.

...

5 V and 2.5 V

...

always enabled (PS_EN = 1)

PS_EN ≠ FX_PS_EN = 1 or 0

Table 14: Dip switch S1B settings overview (1.2 V and 2.5 V rails only).


Signal FX2_PS_EN

To command signal FX2_PS_EN, read the reference firmware code.
IOD = 0x03; // Enable PS_EN and disable PROG_B
OED = 0x03; // Configure PS_EN and PROG as outputs

 

Scroll pdf title
titleTable from EZ-USB(R) Technical Reference Manual (EZ-USB_TRM.pdf).

Table from EZ-USB(R) Technical Reference Manual (EZ-USB_TRM.pdf)

Port D Pin
Alternate
Function
Alternate Function
is Selected By...
Alternate Function
is Described in...
PD[7:0]FD[15:8]

IFCFG1 = 1 and

any WORDWIIDE bit = 1
Slave FIFOs chapter 9 on page 99
Table from EZ-USB(R) Technical Reference Manual (EZ-USB_TRM.pdf).

  

Signal PS_EN

  • Signal PS_EN enables (1) or disables (0) power rails 1.2 V, 1.5 V and 2.5 V.


    Image Removed
    Figure 36:

    Scroll pdf title
    titlePower rails 1.2 V, 1.5 V and 2.5 V could be enabled/disabled by signal PS_EN.
    Image Added


  • Power-rail 3.3V is not controlled by signal PS_EN and is unconditionally enabled. Image Removed  
    Figure 37:

    Scroll pdf title
    titlePower rails 3.3V could not be enabled/disabled by signal PS_EN.
    Image Added

     

VCCIO assembly options

Info
According to the corresponding assembly option, power rail VCCCIO0
can
(enabled by PS_EN and switch S1B ) can depend or not on the power rail 2.5V
power rail.
.

See section "FPGA I/O banks power supply" here.

Image Removed

Figure 37: example of VCCIO0 assembly not dependent on 2.5V power rail. The other way is also possible.

Dip Switch S1B = FX2 PON 

When Dip switch S1B is in the left position ( = FX2 PON : power rails conditionally on depending on signal FX2_PS_EN), signal PS_EN is set to signal FX2_PS_EN (PS_EN = FX2_PS_EN) driven by the EZ-USB FX2LP USB FX2 microcontroller under user control (IOD and OED of fw.c).

Image Removed Image Removed

...

Scroll pdf title
titleS1B on position FX2 PON (PS_EN = FX2_PS_EN = 1 or 0 ).

...

Image Added Image Added

  1. Dynamic full power operation (PS_EN = 1): when the EZ-USB FX2LP USB FX2 microcontroller sets signal PS_EN = FX2_PS_EN = high, power rails rails 1.2 V, 1.5V 5 V and 12.2V 5 V are enabled.
    This setting can be useful for .
  2. Dynamic low power operation (PS_EN = 0): when the EZ-USB FX2LP USB FX2 microcontroller resets signal PS_EN = FX2_PS_EN = low, the following components are switched off:
    • FPGA core logic (1.
    • 2V
    • 2 V)
    • DDR SDRAM (2.
    • 5V
    • 5 V)
    • FPGA bank
    • 3
    • 1 (
    • 2
    • 1.
    • 5V
    • 5 V)
    • VREF
    • VREF1 (
    • 2
    • 0.
    • 5V
    • 75 V)
    • VCCCIO0 (2.
    • 5V
    • 5 V) FPGA bank 0 (if
    • R131
    • R102+
    • R132
    • R103- assembly)

Dip Switch S1B = PON 

Full power operation (PS_EN = 1): when Dip switch S1B is in the right position (PON = power rails unconditionally on), signal PS_EN is set to power rail 3.3V. Thus power rails rails 1.2 V, 1.5V 5 V and 12.2V 5 V are unconditionally enabled.Image Removed Image Removed
Figure 39:

Scroll pdf title
titleS1B on position PON (PS_
EN ≠
EN ≠ FX2_PS_EN = x;
 
PS_EN = high ).

 Image Added Image Added
 

Summary table

Table 14 The table below summarizes all switching options implied by Dip switch S1B and firmware signal FX2_PS_EN (under the standard assembly option). 

Scroll pdf title
titleDip switch S1B settings overview ( 1.2 V, 1.5 V , 2.5 V, VCCIO0).

power rail

S1B= PON
(PS_EN = 1)
(PS_EN ≠ FX2_PS_EN)
(Full power)

S1B = FX2 PON and
PS_EN = FX2_PS_EN = 1

(Dynamic full power)

S1B = FX2 PON and
PS_EN = FX2_PS_EN = 0

(Dynamic low power)

1.2 V

on

on

off

1.

...

5 Vononoff

2.

...

5 V

on

on

off

VCCCIO0 (= 2.

...

5 V)

...

R102-R103+

...

assembly (1)

on

on

off

VCCCIO0 (= 3.

...

3 V)

...

R102+R103-

...

assembly (2)

on

on

on

(1)

...

R102 unpopulated / R103 populated

(2)

...

Table 40: Dip switch S1B settings overview ( 1.2V , 2.5V, VCCIO0).

 Alternate Assembly Options for Dip Switch S1B

Dip switch S1B can be replaced by one resistors in the following cases:

  • cost sensitive applications
  • applications where just one position of S1B is required
  • application where switching of S1B is not allowed.

Assembly option when resistor R17 not populated and R19 populated is equivalent to Dip switch S1B permanently set to PON.

Image Removed
Figure 41: assembly option: S1B = PON.

Assembly option when resistor R17 populated and R19 not populated is equivalent to Dip switch S1B permanently set to FX2 PON.

Image Removed
Figure 42: Assembly option: S1B = FX2 PON.

 

...

Image Removed

...

R102 populated / R103 unpopulated