TexEDA Design GmbH

The Place and Route Package

TexEDA's Place and Route package (LAYPAR) comprises the two main components LAYPLACE and LAYROUTE as well as a dialog frame PARDLG and additional conversion tools.

Requirements
for working with TexEDA's Place and Route Package LAYPAR:

cell library, containing cell shapes with port definitions
user library, containing floorplan consisting of cell block(s), macro(s) and pads
macro library (optional), containing pad and macro definitions (all libraries must be in a special text format or in DBX format)
netlist containing instances of base cells and their interconnections (format Pspice, Hspice or XNDL)
a definition file of scan cells if automatic scan path generation is desired
a definition file of clock buffer cells if clock routing is desired
a definition file of net priorities
a power partitioning file if Dual Voltage is desired

Features:

LAYPAR is provided with the capability of managing up to 100 000 standard cells.
LAYPAR can take net priorities and pad positions into consideration.
LAYPAR supports the automatic generation of scan paths .
Clock trees may be defined and routed separately.
To adapt the process to a user's specific requirement a set of program options is available by LAYPAR.
The automatically generated layout may be converted into GDS2, DXF, or CIF format.
The Power Routing for up to 2 Voltages (Dual Voltage) and Ground may be carried out.
Both LAYPLACE and LAYROUTE may calculate parasitics (node capacitances).
According to a given floorplan LAYPLACE performs a netlist-driven standard cell placement in a field consisting of cell rows.
The standard cells are placed to enable short wire lengths in subsequent routing.
LAYPLACE generates feed cell instances dependent on a given quota and deviation
LAYPLACE works with user-controlled effort in pre-, coarse and fine placement
LAYROUTE performs wiring (routing) of standard cells previously placed by LAYPLACE
LAYROUTE supports up to 3 routing layers in the channel routing.
LAYROUTE generates a layout in DBX format. Hence subsequent interactive changes or supplements may be carried out using LAYED.
LAYROUTE uses a clock skew minimizing algorithm to routing of clock trees.

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