Update FlowVariables.md

Signed-off-by: chrisgelinek-rl <[email protected]>
Signed-off-by: Christian Gelinek <[email protected]>

Author: chrisgelinek-rl

docs/user/FlowVariables.md

@@ -129,6 +129,7 @@ configuration file.
 | <a name="DFF_LIB_FILES"></a>DFF_LIB_FILES| Technology mapping liberty files for flip-flops.| |
 | <a name="DIE_AREA"></a>DIE_AREA| The die area specified as a list of lower-left and upper-right corners in microns (X1 Y1 X2 Y2).| |
 | <a name="DONT_BUFFER_PORTS"></a>DONT_BUFFER_PORTS| Do not buffer input/output ports during floorplanning.| 0|
+| <a name="BUFFER_PORTS_ARGS"></a>BUFFER_PORTS_ARGS| Specify arguments to the buffer_ports call during placement. Only used if DONT_BUFFER_PORTS=0.| |
 | <a name="DONT_USE_CELLS"></a>DONT_USE_CELLS| Dont use cells eases pin access in detailed routing.| |
 | <a name="DPO_MAX_DISPLACEMENT"></a>DPO_MAX_DISPLACEMENT| Specifies how far an instance can be moved when optimizing.| 5 1|
 | <a name="EARLY_SIZING_CAP_RATIO"></a>EARLY_SIZING_CAP_RATIO| Ratio between the input pin capacitance and the output pin load during initial gate sizing.| |