s
MG113P/114P/115P/73P/74P/75P
s
––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
I/O base cells
Separate power bus (V
DDC
, V
SSC
) for
internal core logic (2nd metal/3rd metal)
Configurable I/O pads
for V
DD
, V
SS
, or I/O
1, 2, 3, 4, or 5 layer
metal
interconnection in
core area
Core base cell
with 4 transistors
V
DD
, V
SS
pads (4) in each
corner for wafer probing only
Separate power bus (V
DDO
, V
SSO
) over I/O cell
for output buffers (2nd metal/3rd metal)
Figure 7. MG115P Array Architecture
MG73P/74P/75P CSA Layout Methodology
The procedure to design, place, and route a CSA follows.
1. Select suitable base array frame from the available predefined sizes. To select an array size:
- Identify macrocell functions required and minimum array size to hold macrocell functions.
- Add together all the area occupied by the required random logic and macrocells and select
the optimum array.
2. Make a floor plan for the design’s megacells.
- Oki Design Center engineers verify the master slice and review simulation.
- Oki Design Center or customer engineers floorplan the array using Oki’s supported floor-
planner or Cadence DP3 or Gambit GFP and customer performance specifications.
- Using Oki CAD software, Design Center engineers remove the SOG transistors and replace
them with diffused memory macrocells to the customer’s specifications.
4
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