Part Datasheet Review and Validation

flux

Completed the review and created Part Datasheet Review — NRF54LM20B-PAAA-R7.
Key findings: the official datasheet says this is a CSP98, 98-ball, 0.35 mm pitch part, but the Flux part currently has 99 terminals, including an apparent extra C7 terminal while P1.21 is missing its proper C7 ball assignment. Several other terminals are missing pin numbers/positions, all inspected pins are typed Unspecified, and metadata like Mount = Wire and Logic AND classification does not match an RF SoC.
Suggested next steps:
  1. Fix the missing ball assignments and remove/merge the stray C7 terminal.
  2. Update pin descriptions/types from the datasheet.
  3. Correct package/mount/type metadata to CSP98/SMD/RF SoC.
  4. Re-check the footprint geometry against the 98-ball CSP land pattern.
A

adrian95

Fix the pin map issues, update pin types/descriptions, correct metadata, then verify the footprint geometry.

flux

I’ll apply the datasheet-backed pin map cleanup, update terminal metadata, correct the part classification, then inspect the footprint geometry against CSP98 expectations.

flux

I have the current pin list and allowed metadata values; next I’m applying the CSP98 ball-map corrections and terminal classifications from the Nordic datasheet.

flux

Completed the pin-map cleanup and verification. The part now has 98 terminals/pads, the stray C7 terminal was removed, P1.21/ now maps to ball C7, pin types/descriptions were updated, and the footprint verifies as a 0.35 mm-pitch CSP98 grid with 98 pads.
Open items:
  • Some schematic terminals still have null visual symbol positions, though their electrical pin numbers and descriptions are now correct.
  • Library-search metadata may still show stale global classification until the part is republished/updated through the library workflow.
Detailed results are in Pin Map Fix Verification — NRF54LM20B-PAAA-R7.
Clean symbol, review, export
Fix symbol positions
Run ERC DRC
Export pin map
Check footprint pads
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Pins

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Layout

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Part Datasheet Review — NRF54LM20B-PAAA-R7
Sources reviewed
Current part metadata
  • MPN: NRF54LM20B-PAAA-R7
  • Manufacturer: Nordic Semiconductor
  • Description: RF System-on-Chip / wireless SoC, ultra-low-power 2.4 GHz radio + MCU + Axon NPU, 2.0 MB NVM
  • Part type: Integrated Circuits
  • Designator prefix: IC
  • Flux terminal count: 99
  • Library reports datasheet present: yes
  • Mount property in library: Wire
Datasheet key specs
  • Family/device: nRF54LM20B
  • Ordering code: nRF54LM20B-PAAA-R7
  • Package code: PAAA / PA = CSP98
  • Package size: 3.67 mm × 3.85 mm
  • Ball count: 98
  • Ball pitch: 0.35 mm
  • GPIO count: 66
  • NVM: 2036 KB RRAM
  • RAM: 512 KB
  • Axon NPU: present on nRF54LM20B
  • VDD operating range: 1.7 V to 3.6 V
  • VBUS for USB PHY: 3.67 V to 5.5 V, nominal 5.0 V; VBUS cannot power the device
  • Operating temperature: -40 °C to +85 °C
  • Radio: 2.4 GHz multiprotocol transceiver, 2400–2500 MHz
  • Protocol support: Bluetooth LE, IEEE 802.15.4 for Thread/Zigbee, proprietary 2.4 GHz
  • USB: USB 2.0 device, high-speed 480 Mbps / full-speed 12 Mbps / low-speed 1.5 Mbps, no OTG
Pin/ball cross-check findings
Matches observed
Most populated schematic terminal pin numbers match the CSP98 datasheet table, including:
  • VSS balls: A1, A7, A10, D1, D2, E5, E6, F1, F5, F6, K1, K10
  • VDD balls: A3, A4, A9, G10, H1
  • USB balls: D- = K4, D+ = K5, DECUSB = K6, VBUS = K7
  • Debug balls: SWDCLK = G1, SWDIO = G2, NRESET = F2
  • RF/crystal/decoupling examples: ANT = E1, XC1 = A2, XC2 = B1, DECA = A8, DCC = A5, DECD = A6, DECRF = C1, TXRTUNE = J5
  • Populated GPIO examples: P0.00 = K3, P0.09 = E3, P1.30 = J10, P1.31 = K9, P2.00 = B10, P2.06 = B9, P3.00 = H7 through P3.12 = D4 where present
Mismatches / issues flagged
  1. Terminal count mismatch
    • Datasheet package: CSP98 = 98 balls.
    • Flux part project: 99 schematic terminals.
    • Root cause appears to be an extra terminal named C7 with Pin Number = 0, while the real CSP98 ball C7 is P1.21.
  2. Incorrect or extra C7 terminal
    • Datasheet: ball C7 maps to pin name P1.21.
    • Schematic: separate terminal C7 has Pin Number = 0.
    • Schematic also has P1.21/ but with no pin number and invalid/null symbol position.
    • Recommended fix: remove/rename the stray C7 terminal and assign P1.21/ to ball C7.
  3. Several terminals are missing pin numbers and have invalid/null schematic positions
    • P1.01/ should be J6
    • P1.02/ should be J7
    • P1.03/ should be H9
    • P1.07 should be G8
    • P1.09/ should be E8
    • P1.15/ASO[2] should be B2
    • P1.18/ should be B5
    • P1.19/ should be B6
    • P1.21/ should be C7
    • P1.25/ should be E7
    • P1.29 should be H10
    • P2.01/ should be C10
    • P2.02/ should be D10
    • P2.03/ should be E10
    • P2.04/ should be F10
    • P2.05/ should be G9
    • P2.07/ should be C9
    • P2.08/ should be D9
    • P2.09/ should be E9
    • P2.10/ should be F9
  4. Pin Type is generic/unspecified for all terminals inspected
    • Every inspected terminal reports Pin Type: Unspecified.
    • This is not a ball-map mismatch, but it reduces ERC quality. Power pins should be typed as power/ground where possible; GPIO/debug/RF/USB pins should have more specific descriptions/types.
  5. Footprint structure needs cleanup/verification
    • Layout contains terminal pads plus a default footprint with additional Mounts pads for the same ball names.
    • Expected footprint for the package is exactly CSP98, 0.35 mm pitch, 3.67 mm × 3.85 mm.
    • The layout inspection did not expose pad dimensions/coordinates in the returned tree, so exact land pattern geometry could not be fully verified here.
  6. Metadata mismatch: Mount = Wire
    • The library entry reports Mount as Wire.
    • The real part is a surface-mount CSP/WLCSP/BGA-style package.
    • Recommended fix: change Mount/package metadata to SMD / CSP98 or equivalent supported values.
  7. Part type-specific values appear wrong
    • Library entry reports IC type Logic and logic function AND.
    • This is not correct for an RF SoC with MCU/NPU/radio/USB.
    • Recommended fix: update type-specific classification to SoC / RF System-on-Chip / Microcontroller Wireless SoC if supported.
Datasheet URL action
The Flux library entry already had a Datasheet URL set, so no Datasheet URL overwrite was required. I also stored the official Nordic online datasheet location in the project Implementation Details field for traceability: https://docs.nordicsemi.com/r/bundle/ps_nrf54lm20a/
  1. Fix the pin map errors and missing ball numbers listed above.
  2. Remove the extra C7/Pin Number = 0 terminal or merge it into P1.21.
  3. Update terminal pin descriptions/types from the datasheet.
  4. Correct metadata: Mount, package/case, IC subtype/classification.
  5. Re-run symbol/footprint validation after the cleanup and verify the footprint has exactly 98 CSP pads at 0.35 mm pitch.

  • Sources reviewed

  • Current part metadata

  • Datasheet key specs

  • Pin/ball cross-check findings

  • Matches observed

  • Mismatches / issues flagged

  • Datasheet URL action

  • Recommended remediation order