In cases where certain interfaces are not used, the associated pins need to be configured properly. For example, the pins of an unused crystal oscillator can be left floating (DNC) and must not be grounded. If a PLL is not used or bypassed, and only the divider circuitry is used, then the PLL’s pins can be powered without RC filter circuitry.
For SmartFusion2/IGLOO2 devices with multiple SerDes blocks, designers should tie off unused SerDes blocks, as shown in the following figure.
For banks configured as LPDDR or single-ended I/O (and MDDR or FDDR functionalities are not being used), VREFx can be left floating (DNC) even though the corresponding bank supply is still powered.
To allow a SmartFusion2/IGLOO2 device, to exit from reset, some of the bank supplies (VDDIx) must always be powered, even if associated bank I/Os are unused (as shown in Table 3 and Table 2).
For details on bank locations for all the devices, see DS0115: SmartFusion2 Pin Descriptions Datasheet or DS0124: IGLOO2 Pin Descriptions Datasheet.
Bank Supply Names |
FC1152 |
FG896 |
FG676 |
|
FCS536 |
FCV484 |
---|---|---|---|---|---|---|
M2S150T/ M2GL050T |
M2S050T/ M2GL050T |
M2S090T/ M2GL090T |
M2S060T/ M2GL060T |
M2S150T/ M2GL150T |
M2S150T/ M2GL150 |
|
VDDI0 |
— |
Connect to VSS through a 10 kΩ resistor |
— |
— |
||
VDDI1 |
Connect to VSS through a 10 kΩ resistor |
Must connect to VDDI1 |
Connect to VSS through a 10 kΩ resistor.
|
|||
VDDI2 |
Connect to VSS through a 10 kΩ resistor |
Must connect to VDDI2 |
Must connect to VDDI2 |
Must connect to VDDI2 |
Connect to VSS through a 10 kΩ resistor | |
VDDI3 |
Connect to VSS through a 10 kΩ resistor |
Must connect to VDDI3 |
Must connect to VDDI3 |
Must connect to VDDI3 |
Connect to VSS through a 10 kΩ resistor | |
VDDI4 |
Connect to VSS through a 10 kΩ resistor |
— |
Must connect to VDDI4 |
Connect to VSS through a 10 kΩ resistor |
||
VDDI5 |
Connect to VSS through a 10 kΩ resistor |
|||||
VDDI6 |
Must connect to VDDI6 |
Connect to VSS through a 10 kΩ resistor |
Must connect to VDDI6 |
Must connect to VDDI6 |
||
VDDI7 |
Must connect to VDDI7 |
Connect to VSS through a 10 kΩ resistor |
Must connect to VDDI7 |
Must connect to VDDI7 |
||
VDDI8 |
Connect to VSS through a 10 kΩ resistor |
|||||
VDDI9 |
Connect to VSS through a 10 kΩ resistor |
— |
Connect to VSS through a 10 kΩ resistor |
|||
VDDI10 |
Connect to VSS through a 10 kΩ resistor |
— |
— |
— |
Connect to VSS through a 10 kΩ resistor |
|
VDDI11 |
Connect to VSS through a 10 kΩ resistor |
— |
— |
— |
Connect to VSS through a 10 kΩ resistor |
|
VDDI12 |
Connect to VSS through a 10 kΩ resistor |
— |
— |
— |
Connect to VSS through a 10 kΩ resistor |
|
VDDI13 |
Connect to VSS through a 10 kΩ resistor |
— |
— |
— |
Connect to VSS through a 10 kΩ resistor |
|
VDDI14 |
Connect to VSS through a 10 kΩ resistor |
— |
— |
— |
Connect to VSS through a 10 kΩ resistor |
|
VDDI15 |
Connect to VSS through a 10 kΩ resistor |
— |
— |
— |
Connect to VSS through a 10 kΩ resistor |
|
VDDI16 |
Connect to VSS through a 10 kΩ resistor |
— |
— |
— |
Connect to VSS through a 10 kΩ resistor |
|
VDDI17 |
Connect to VSS through a 10 kΩ resistor |
— |
— |
— |
Connect to VSS through a 10 kΩ resistor |
|
VDDI18 |
Connect to VSS through a 10 kΩ resistor |
— |
— |
— |
Connect to VSS through a 10 kΩ resistor |
— |
Bank Supply Names |
FG484 |
|||||
---|---|---|---|---|---|---|
M2S090T/ M2GL090T |
M2S060T/ M2GL060T |
M2S050T/ M2GL050T |
M2S025T/ M2GL025T |
M2S010T/ M2GL010T |
M2S005/ M2GL005 |
|
VDDI0 |
— |
— |
Connect to VSS through a 10 kΩ resistor |
|||
VDDI1 |
Connect to VSS through a 10 kΩ resistor |
Must connect to VDDI1 |
Must connect to VDDI1 |
Must connect to VDDI1 |
Must connect to VDDI1 |
|
VDDI2 |
Must connect to VDDI2 |
Must connect to VDDI2 |
— |
Must connect to VDDI2 |
Must connect to VDDI2 |
Must connect to VDDI2 |
VDDI3 |
Must connect to VDDI3 |
— |
Must connect to VDDI3 |
Connect to VSS through a 10 kΩ resistor |
Must connect to VDDI3 |
Connect to VSS through a 10 kΩ resistor |
VDDI4 |
Connect to VSS through a 10 kΩ resistor |
Must connect to VDDI4 |
Connect to VSS through a 10 kΩ resistor |
Must connect to VDDI4 |
Connect to VSS through a 10 kΩ resistor |
Must connect to VDDI4 |
VDDI5 |
Connect to VSS through a 10 kΩ resistor |
|||||
VDDI6 |
Connect to VSS through a 10 kΩ resistor |
|||||
VDDI7 |
Connect to VSS through a 10 kΩ resistor |
— |
||||
VDDI8 |
Connect to VSS through a 10 kΩ resistor |
— |
— |
— |
||
VDDI9 |
— |
Connect to VSS through a 10 kΩ resistor |
— |
— |
— |
— |
Bank Supply Names |
VF400 |
FCS325 |
|||||||
---|---|---|---|---|---|---|---|---|---|
M2S060T/ M2GL060T |
M2S050T/ M2GL050T |
M2S025T/ M2GL025T |
M2S010T/ M2GL010T |
M2S005/ M2GL005 |
M2S090T/ M2GL090T |
M2S060T/ M2GL060T |
M2S050T/ M2GL050T |
M2S025T/ M2GL025T |
|
VDDI0 |
— |
Connect to VSS through a 10 kΩ resistor |
— |
— |
Connect to VSS through a 10 kΩ resistor |
||||
VDDI1 |
Connect to VSS through a 10 kΩ resistor |
Must connect to VDDI1 |
Must connect to VDDI1 |
Must connect to VDDI1 |
Must connect to VDDI1 |
Connect to VSS through a 10 kΩ resistor
|
Must connect to VDDI1 |
Must connect to VDDI1 |
|
VDDI2 |
Must connect to VDDI2 |
— |
Must connect to VDDI2 |
Must connect to VDDI2 |
Must connect to VDDI2 |
Must connect to VDDI2 |
Must connect to VDDI2 |
Must connect to VDDI2 |
— |
VDDI3 |
— |
Must connect to VDDI3 |
Connect to VSS through a 10 kΩ resistor |
Must connect to VDDI3 |
Must connect to VDDI3 |
Must connect to VDDI3 |
Connect to VSS through a 10 kΩ resistor |
||
VDDI4 |
Must connect to VDDI4 |
Connect to VSS through a 10 kΩ resistor |
Must connect to VDDI4 |
Connect to VSS through a 10 kΩ resistor |
Must connect to VDDI4 |
Connect to VSS through a 10 kΩ resistor |
Must connect to VDDI4 |
||
VDDI5 |
Connect to VSS through a 10 kΩ resistor |
||||||||
VDDI6 |
Connect to VSS through a 10 kΩ resistor |
||||||||
VDDI7 |
Connect to VSS through a 10 kΩ resistor |
— |
Connect to VSS through a 10 kΩ resistor |
||||||
VDDI8 |
Connect to VSS through a 10 kΩ resistor |
— |
— |
— |
Connect to VSS through a 10 kΩ resistor |
||||
VDDI9 |
Connect to VSS through a 10 kΩ resistor |
— |
— |
— |
— |
— |
Connect to VSS through a 10 kΩ resistor |
— |
— |
Bank Supply Names |
VF256 |
TQ144 |
|||
---|---|---|---|---|---|
M2S025T/ M2GL025T |
M2S010T/ M2GL010T |
M2S005S/ M2GL005S |
M2S010S/ M2GL010S |
M2S005S/ M2GL005S |
|
VDDI0 |
Connect to VSS through a 10 kΩ resistor |
||||
VDDI1 |
Must connect to VDDI1 |
Must connect to VDDI1 |
Must connect to VDDI1 |
— |
— |
VDDI2 |
Must connect to VDDI2 |
Must connect to VDDI2 |
Must connect to VDDI2 |
Must connect to VDDI2 |
Must connect to VDDI2 |
VDDI3 |
Connect to VSS through a 10 kΩ resistor |
||||
VDDI4 |
Must connect to VDDI4 |
Must connect to VDDI4 |
Must connect to VDDI4 |
Must connect to VDDI4 |
Must connect to VDDI4 |
VDDI5 |
Connect to VSS through a 10 kΩ resistor |
— |
Connect to VSS through a 10 kΩ resistor |
||
VDDI6 |
Connect to VSS through a 10 kΩ resistor |
||||
VDDI7 |
Connect to VSS through a 10 kΩ resistor |
— |
Connect to VSS through a 10 kΩ resistor |
— |