iPDN/iPNP · power/ground network build & reinforcement

# Core capabilities

# Power/ground network construction

iPDN automatically builds multi-layer power grids including global straps, trunks, and via stacks. With effort="standard", Agents run the full grid build; with effort="estimate", they get structural assessment only without writing physical data.

# PDN structure inspection

Agents call iPDN.inspect to check current PDN topology, inter-layer connectivity, and IR-drop at critical nodes. Results return a structured topology graph and a weakness list for downstream reinforcement.

# Power integrity verification

Integrated with iPA IR-drop analysis, iPDN verifies power integrity after PDN construction. Returns maximum current density per metal layer, IR-drop in hotspot regions, and EM risk scores.

# Reinforcement plan generation

For IR-drop hotspots, Agent-callable iPDN.reinforce generates local reinforcement plans—adding straps, widening metal, or inserting vias. Each plan includes estimated IR-drop improvement and area overhead.

# iPNP local reinforcement

iPNP complements iPDN with localized power-grid patching. Agents can reinforce P/G in specified hotspot regions without changing the global PDN—ideal for ECO-stage power fixes.

# Agent calling patterns

iPDN/iPNP expose three equivalent calling protocols.

from ieda import Client

client = Client("http://localhost:9099")

# Build power grid
result = client.call(
    "iPDN.build",
    design_ref="snap_8a2b",
    effort="standard",
    intent_ref="intent_v3",
)

# Local reinforcement for hotspot
reinforce = client.call(
    "iPNP.reinforce",
    design_ref="snap_8a2b_v2",
    hotspots=[(120, 340), (780, 210)],
)
print(reinforce.ir_drop_after)  # 1.1%

// JSON-RPC over MCP
{
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "name": "iPDN.build",
    "arguments": {
      "design_ref": "snap_8a2b",
      "effort": "standard",
      "intent_ref": "intent_v3"
    }
  }
}

# Build power grid
iPDN::build -design snap_8a2b -effort standard

# Inspect PDN structure
iPDN::inspect -design snap_8a2b

# Local P/G reinforcement
iPNP::reinforce -hotspots {120 340 780 210}

# Input / output contract

Request Schema — iPDN.build

Result Schema

# Role in the flow

     iFP (Floorplan)
         │
         ▼
  ┌──────────────┐
  │    iPDN  ◆  │  power/ground network construction
  │  iPNP (local)  │  reinforcement and patching
  └──────┬───────┘
         │
         ▼
  ┌──────────────┐
  │     iPL      │  Global / legalize / detailed place
  └──────────────┘

# Related resources