Review all available part information (MPN, packag...
Review all available part information (MPN, package, pin count, description, properties). If no datasheet URL is already set, search the web for the official datasheet and update the part's Datasheet property with the URL. Then cross-check the schematic symbol, footprint, and pin descriptions against the datasheet. Summarize key specs and flag any mismatches.
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Part Audit
Scope and Sources
Reviewed the published Flux part
DLS24035B against:- User-specified Datasheet URL: https://www.snapeda.com/parts/DLS24035B/Elecrow/datasheet/
- Official Elecrow product page: https://www.elecrow.com/3-5-inch-480-320-spi-tft-lcd-module-with-ili9488-driver.html
- Official Elecrow module manual linked to this SKU: https://www.elecrow.com/download/product/DLS24035B/3.5inch_SPI_Module_User_Manual.pdf
- Elecrow manual identity: 3.5inch SPI Module MSP3520, document CR2018-MI3128, Rev 1.0
The SnapEDA page confirms the part number and manufacturer but does not expose detailed pin or mechanical data in page text. The official Elecrow manual was therefore used for the technical cross-check.
Existing Part Metadata
Table
| Field | Current value | Assessment |
|---|---|---|
| Manufacturer Part Number | DLS24035B | Matches Elecrow product SKU |
| Manufacturer | Elecrow (project description/source) | Matches |
| Package or Case Code | Module | Reasonable but generic |
| Part Type | Optoelectronic Devices | Reasonable |
| Designator Prefix | DS | Reasonable for display module |
| Datasheet URL | https://www.snapeda.com/parts/DLS24035B/Elecrow/datasheet/ | Updated to user-specified URL |
| Description | Elecrow 3.5 Inch 480x320 SPI TFT LCD Module with ILI9488 Driver | Matches product |
| Published terminal count | 22 | 14 primary interface pins + 4 SD-related pins + 4 mounting/shield terminals |
Key Specifications
Table
| Parameter | Specification |
|---|---|
| Display size | 3.5 inch TFT |
| Resolution | 480 x 320 pixels (panel orientation also stated as 320 RGB x 480) |
| Display colors | RGB 65K color |
| LCD driver | ILI9488 |
| LCD interface | 4-wire SPI |
| Touch | Optional resistive touch; MSP3520 with touch, MSP3521 without touch |
| Supply voltage | 3.3 V to 5 V |
| Approximate current | 90 mA |
| Active area | 48.96 x 73.44 mm |
| PCB/module size | 56.34 x 98.00 mm |
| Viewing angle | Greater than 60 degrees |
| Operating temperature | -20 C to +70 C |
| Storage temperature | -30 C to +80 C |
| Product weight | Approximately 45 g |
| Mounting pattern | Four holes, 3.20 mm drill, 4.70 mm outer pad/clearance; 49.50 x 92.00 mm center spacing |
| Main connector | 14 positions, 2.54 mm pitch; 33.02 mm end-to-end pin-center span |
Symbol and Pin Cross-Check
Primary 14-pin interface
All primary pin numbers and names match the Elecrow manual:
Table
| Pin | Symbol name | Datasheet function | Result |
|---|---|---|---|
| 1 | VCC | 3.3 V to 5 V module power | Match |
| 2 | GND | Power ground | Match |
| 3 | CS | LCD chip select | Match |
| 4 | RESET | LCD reset | Match |
| 5 | DC/RS | LCD command/data or register/data select | Match |
| 6 | SDI(MOSI) | LCD SPI write data | Match |
| 7 | SCK | LCD SPI clock | Match |
| 8 | LED | Backlight control, high = on | Match |
| 9 | SDO(MISO) | LCD SPI read data | Match |
| 10 | T_CLK | Resistive-touch SPI clock | Match |
| 11 | T_CS | Touch chip select | Match |
| 12 | T_DIN | Touch SPI input/write data | Match |
| 13 | T_DO | Touch SPI output/read data | Match |
| 14 | T_IRQ | Touch interrupt | Match |
The symbol's electrical pin types are generally sensible: VCC/GND are power inputs; LCD and touch clocks/data-select/control inputs are inputs; MISO, T_DO, and T_IRQ are outputs.
Terminal descriptions and electrical types
All 22 terminals now have
Pin Description and reviewed Pin Type properties. The 14 primary connector descriptions follow the Elecrow manual. LCD/touch control and host-to-module SPI signals are Inputs; LCD/touch MISO and interrupt signals are Outputs; VCC and GND are Power In. The four separate J4 SD terminals are typed by their existing SPI direction and explicitly state that this separate mapping is not documented in the Elecrow interface table. The four plated mounting terminals are Passive and state that their electrical connection is not specified by Elecrow.Additional SD terminals
The symbol includes
SD_CS, SD_MOSI, SD_MISO, and SD_SCK as a separate four-pin group (J4_1 through J4_4). The reviewed Elecrow manual documents an onboard SD-card slot but its primary external interface table only defines the 14-pin LCD/touch connector. The exact existence, location, and numbering of a separate J4 header were not confirmed by the available official text. Treat these four terminals as unverified until checked against a clear board drawing or the physical module.Mounting terminals
Four terminals named
SHIELD, SHIELD__1, SHIELD__2, and SHIELD__3 correspond spatially to the four mounting locations. Calling mechanical mounting holes “SHIELD” is misleading unless the plated rings are intentionally electrically bonded. The official drawing identifies mounting holes, not shield contacts.Footprint Cross-Check
Footprint repair completed
The uniform 1000x unit error has been repaired and every footprint pad and outline was independently read back after mutation:
Table
| Feature | Verified Flux value | Manual target | Result |
|---|---|---|---|
| Body outline | 56.34 x 98.00 mm | 56.34 x 98.00 mm | Match |
| Main-header pitch | 2.54 mm | 2.54 mm | Match |
| Main-header span | 33.02 mm | 13 x 2.54 = 33.02 mm | Match |
| Main-header pad/drill | 1.50 mm / 1.00 mm | 1.50 mm / 1.00 mm source geometry | Match |
| Four-pin-row pitch/span | 2.54 mm / 7.62 mm | 2.54 mm / 3 x 2.54 mm | Match |
| Mounting copper diameter | 4.70 mm | 4.70 mm | Match |
| Mounting drill | 3.20 mm plated | 3.20 mm | Match |
| Mounting-hole spacing | 49.50 x 92.00 mm | 49.50 x 92.00 mm | Match |
| Hole-center edge offsets | 3.42 mm X, 3.00 mm Y | Derived from outline and spacing | Match |
All four corner features are now plated through-hole pads with centered 3.20 mm drills and 4.70 mm copper diameter. Their existing terminal mappings were preserved.
Pin-1 indication
Pin 1 uses a 1.50 x 1.50 mm rectangular plated pad with a 1.00 mm drill at (-16.51, -47.00) mm. The pin-1 marker remains aligned with that end of the main header.
Outline and hole positions
The repaired positions match the expected geometry:
- Outline: 56.34 x 98.00 mm
- Mounting-hole center spacing: 49.50 x 92.00 mm
- Main header pitch: 2.54 mm
- Main header span: 13 x 2.54 mm = 33.02 mm
This indicates the source dimensions were likely correct before unit conversion.
Mismatch Summary
Resolved
- The 1000x footprint scale error is corrected.
- Four 3.20 mm mounting drills are present on the correct 49.50 x 92.00 mm pattern.
Major
- The four mechanical mounting features are named and modeled as shield terminals rather than clearly defined mechanical mounting holes.
- The separate four-pin SD interface (
J4) is not verified by the official interface table reviewed.
Minor / metadata
- Package metadata is only
Module; a more descriptive package identifier could include the 56.34 x 98 mm module and 2.54 mm header format.
Recommended Remediation
- Confirm whether the plated mounting rings are electrically connected before intentionally using the
SHIELDterminals in a circuit. - Verify the separate J4 SD header from a clear module drawing or physical unit.
Overall Assessment
The schematic's primary 14-pin signal mapping, terminal descriptions, and electrical pin types now match the official Elecrow module manual. The footprint scale, header geometry, module outline, and four mounting holes are repaired and dimensionally verified. Remaining open questions are limited to the electrical meaning of the plated
SHIELD mounting rings and the separately exposed J4 SD header.Scope and Sources
Existing Part Metadata
Key Specifications
Symbol and Pin Cross-Check
Primary 14-pin interface
Terminal descriptions and electrical types
Additional SD terminals
Mounting terminals
Footprint Cross-Check
Footprint repair completed
Pin-1 indication
Outline and hole positions
Mismatch Summary
Resolved
Major
Minor / metadata
Recommended Remediation
Overall Assessment
