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Spartan-6 FPGA Power Management
UG394 (v1.1) September 4, 2012
Chapter 3:
Lower-Power Spartan-6 LX Devices
Table 3-1
summarizes the designations for a member of the lower-power Spartan-6 LX
devices.
Lower-Power Spartan-6 LX Device Specifications
Several specifications are different for the lower-power Spartan-6 LX devices than in the
standard Spartan-6 LX family. All of the differences are listed in
DS162
,
Spartan-6 FPGA
Data Sheet: DC and Switching Characteristics
.
The lower-power Spartan-6 LX devices require a V
CCINT
of 1.0V ±5%, or 0.95V to 1.05V. It
is not tested or guaranteed at 1.2V, and therefore the V
CCINT
cannot be scaled up and down
between 1.2V and 1.0V. In the same way, a standard Spartan-6 LX device cannot be
operated at 1.0V.
The lower-power Spartan-6 LX devices have lower-power specifications, as seen in the
data sheet for quiescent current, and in the Power Estimators for both quiescent and
dynamic current and power. See
Chapter 5, Power Estimation
.
Because of the reduction in maximum V
CCINT
, the maximum time for ramping up is
shorter. See the V
CCINTR
ramp time specification in
DS162
,
Spartan-6 FPGA Data Sheet: DC
and Switching Characteristics
.
Because the I/O thresholds for LVCMOS12, LVCMOS15, and LVCMOS18 are based on the
V
CCINT
level, they are slightly lower for the lower-power Spartan-6 LX devices than the
standard Spartan-6 family. See the
SelectIO Interface DC Input and Output Levels
table in
DS162
,
Spartan-6 FPGA Data Sheet: DC and Switching Characteristics
.
The lower-power Spartan-6 LX devices require V
CCAUX
= 2.5V when using the LVDS_25,
LVDS_33, BLVDS_25, LVPECL_25, RSDS_25, RSDS_33, PPDS_25, and PPDS_33
I/O standards on inputs. LVPECL_33 is not supported in these devices.
Lower-power Spartan-6 LX devices only support tap 0 of the IODELAY2.
Table 3-1:
Lower-Power Spartan-6 LX Device Designation Examples
Designation
Example
Ordering Code
XC6SLX16-L1CSG324C
Mark
XC6SLX16
CSG324
DxxxxxxxA (lot code)
L1C
Software Family
In software choose:
Spartan6 Lower Power
Software Device
XC6SLX16L-1LCSG324
Speed Specification
-1L
