E062 · Source-scoped pinout variants

microSD card form engineering reference

Default Speed, High Speed and UHS-I conventional first-row scope. Extra-row UHS-II and SD Express variants are explicitly outside this native assignment.

Open field note Source trail

Source checked · no independent review claimed · Fabrication approved: no

microSD — conventional single-row engineering reference original orientation schematic — Original pinout diagram; read the exact variant and view below. Not to scale.

Contact count

8

Conventional card contact face, not a receptacle terminal or PCB footprint

Mating boundary

Shape is not the verdict.

Match the keyed card form to the documented socket. A form match does not establish bus, capacity or speed-class support.

source-scoped contact reference · independent review pending

Read the contact side, not a guessed mirror

This pilot uses the documented view for Swissbit S-46u conventional microSD. It is not a general pinout, device compatibility check, wiring instruction or fabrication drawing.

Original contact-index strip, not the card outline. Contact edge is at the top in the cited bottom view; the socket view is NOT represented.

Source scopeS-46u Revision 1.00

Reading directionCard bottom / visible contact face

Contact mappingNumbered layout, within exact cited view

Verify next: Compare exact card generation and socket documentation. UHS-II and SD Express second-row contacts are outside this eight-position layout.

Show source locator, claim and unresolved limitations

C062D · open this page’s canonical claim — Swissbit S-46u Revision 1.00, page 8, gives this native SD-mode assignment in Figure 2 bottom-view numbering: 1 DAT2, 2 CD/DAT3, 3 CMD, 4 VDD, 5 CLK, 6 VSS, 7 DAT0, 8 DAT1. The same table gives different SPI-mode functions on several pads.

S391 · Swissbit AG (manufacturer document hosted by Farnell) / source register · Read original source ↗

Source location: Page 8, Figure 2 bottom view and Table 11 native SD / SPI pad assignments

Limitations: Distributor-hosted manufacturer PDF, not an independently authenticated original. No universal SPI, SD Express or UHS-II pinout; original 19-page document is linked, not redistributed.

Profile unknowns: Socket pad positions, terminal numbering, tolerances, keep-outs and insertion forces are not established.

Rights: Linked primary document and original factual paraphrase only. No publisher images, logos or document pages redistributed. The indexed schematic is original, not a tracing of the source drawing.

Source-scoped reference · No independent technical or rights certification claimed · Physical fit, polarity, voltage and device modes: not inferred.

Orientation

How to read this profile

Swissbit S-46u Revision 1.00 Figure 2: bottom/contact-face view, contact edge at top and stepped/notched side at left. Contacts 1 through 8 run left to right in that figure. This is not a mirrored socket-terminal view.

Bounded dimensions

Only what the sources support

Source-scoped dimensions; not fabrication clearances
Field	Value	Scope	Evidence
Nominal card length	15 mm	nominal identifier	[C062B]
Nominal card width	11 mm	nominal identifier	[C062B]
Nominal maximum envelope thickness	1 mm	nominal identifier	[C062B]

Source-scoped identification facts

Each value retains its exact example, role and measurement axis. Facts from different parts must not be combined into an invented component.

Documented examples; not a mating drawing or compatibility approval
Nominal contacts	8S041 · S042 · S041 · S391 · S392Conventional card contact face, not a receptacle terminal or PCB footprint; nominal engineering count, not automatically positions, population or a device wiring map. Conventional card contact face, not a receptacle terminal or PCB footprint
Contact rows	1 (Claim C062B)S041 · S042Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. The SD Association lists a nominal microSD envelope of 15 × 11 × 1.0 mm (length × width × thickness). Conventional single-row cards for Default Speed, High Speed and UHS-I use eight contacts. \| Nominal microSD card identification and conventional first-row count; no inference about extra contacts, exact host support or fabrication dimensions.
Dimensions / axis	15 mm Nominal card length; 11 mm Nominal card width; 1 mm Nominal maximum envelope thicknessS041 · S042Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. nominal_identifier; Conventional card contact face, not a receptacle terminal or PCB footprint
Connector role	socketS041 · S042 · S041 · S391 · S392Recorded source-scoped values; named examples do not describe every family variant or establish compatibility. Conventional card contact face, not a receptacle terminal or PCB footprint
Series	microSDS919Named source examples retain separate role, part, view and axis limits; values are not a universal family specification. microSD. Nominal dimensions reproduced in the published tuple order; no length/width names invented from unlabelled axes.; Capacity/speed logos are separate standards; no specimen logo, speed or compatibility inferred.

Not recorded: Positions / cavity span, Populated contacts, Contact pitch, Contact gender / arrangement, Mounting, Coupling / latch, Keying / polarization, Shell / form, Manufacturer, Exact part / implementation, Recorded markings, View convention. Unknown fields stay unknown; illustrations supply no measurements or pin assignments.

Recorded variant and source limits

Socket pad positions, terminal numbering, tolerances, keep-outs and insertion forces are not established.
Capacity-family support, enabled bus mode and speed class require exact card and host documentation.
Additional-row contacts are not represented by this conventional first-row contact count.
No electrical limits, initialization sequence, wiring procedure or fabrication approval are supplied.
SPI-mode roles differ; the displayed native SD functions must not be reused as an SPI wiring table. Extended data-line behavior at startup is not a completed operational design.
Transcend USDC10I — sd-native: PDF p.1 Placement contact-side drawing and Pin Definition table. microSD drawing labels 1-8 left to right as printed.
Transcend USDC10I — spi: PDF p.1 Placement contact-side drawing and Pin Definition table. microSD drawing labels 1-8 left to right as printed.
Transcend USDC10I — Native SD mode: Card contact-side placement drawing on PDF p. 1, contacts toward top; microSD contacts are numbered 1-8 left to right.
Transcend USDC10I — SPI mode: Card contact-side placement drawing on PDF p. 1, contacts toward top; microSD contacts are numbered 1-8 left to right.

Report a correction to these facts →

Pins & wiring

Pinout

Choose the exact wiring. Pin numbers follow its stated view; a schematic does not establish physical positions. Check your exact device before wiring.

Dark pinout view

What the status labels mean

Confirmed: Recorded research passes agree within this variant; this is not independent human review or hardware validation.
Single source: Only one underlying document, or one pass, supports this assignment.
Device-specific: Supported for the named equipment or wiring only. Check your device’s manual.
Unverified: Missing or conflicting evidence. Do not wire from this row.
Not connected: The source explicitly says NC, no contact or no pin for this wiring.

Wiring variantTranscend USDC10I — sd-native

Transcend USDC10I — sd-native

Device-specific wiring. Check your device’s manual before connecting or applying power.

View and evidence limits

PDF p.1 Placement contact-side drawing and Pin Definition table. microSD drawing labels 1-8 left to right as printed.

P062 microSD — **Agree** on all eight native/SPI positions, but **same source** — Same Transcend USDC10I V1.0 document, URL and hash in both. Reserved SPI 1/8 are not inferred internally disconnected. The two modes and later additional-contact systems remain separate.
UHS-II, SD Express/microSD Express extra contacts and enhanced forms are outside these single-row tables. Reserved SPI contacts are not inferred disconnected.

Schematic only · physical contact positions unconfirmed. Original drawing · not to scale. Scroll sideways if needed.

Transcend USDC10I — sd-native — source-scoped contact map
Pin	Signal	What it does	Status
1	DAT2	Control, detection or configuration connection; check the source and device.	Device-specific Sources
2	CD/DAT3	Control, detection or configuration connection; check the source and device.	Device-specific Sources
3	CMD	Control, detection or configuration connection; check the source and device.	Device-specific Sources
4	VDD	Power connection (VDD). Check the specified supply.	Device-specific Sources
5	CLK	Clock or clock-control connection, as named by this source.	Device-specific Sources
6	VSS	Ground reference and return.	Device-specific Sources
7	DAT0	Control, detection or configuration connection; check the source and device.	Device-specific Sources
8	DAT1	Control, detection or configuration connection; check the source and device.	Device-specific Sources

Sources (1)

S716 · Transcend Information, Inc. · USDC10I Industrial High Capacity microSD Card Datasheet
V1.0, 2015-02-26 (Revision History, PDF p.27) | V1.0, February 26, 2015 (Revision History, PDF p. 27) · PDF p.1, Placement drawing and Pin Definition, SD Mode columns

Transcend USDC10I — spi

Device-specific wiring. Check your device’s manual before connecting or applying power.

View and evidence limits

PDF p.1 Placement contact-side drawing and Pin Definition table. microSD drawing labels 1-8 left to right as printed.

P062 microSD — **Agree** on all eight native/SPI positions, but **same source** — Same Transcend USDC10I V1.0 document, URL and hash in both. Reserved SPI 1/8 are not inferred internally disconnected. The two modes and later additional-contact systems remain separate.
UHS-II, SD Express/microSD Express extra contacts and enhanced forms are outside these single-row tables. Reserved SPI contacts are not inferred disconnected.

Schematic only · physical contact positions unconfirmed. Original drawing · not to scale. Scroll sideways if needed.

Transcend USDC10I — spi — source-scoped contact map
Pin	Signal	What it does	Status
1	RSV	Reserved; no general-purpose wiring is established.	Device-specific Sources
2	CS	Control, detection or configuration connection; check the source and device.	Device-specific Sources
3	DI	Control, detection or configuration connection; check the source and device.	Device-specific Sources
4	VDD	Power connection (VDD). Check the specified supply.	Device-specific Sources
5	SCLK	Clock or clock-control connection, as named by this source.	Device-specific Sources
6	VSS	Ground reference and return.	Device-specific Sources
7	DO	Control, detection or configuration connection; check the source and device.	Device-specific Sources
8	RSV	Reserved; no general-purpose wiring is established.	Device-specific Sources

Sources (1)

S716 · Transcend Information, Inc. · USDC10I Industrial High Capacity microSD Card Datasheet
V1.0, 2015-02-26 (Revision History, PDF p.27) | V1.0, February 26, 2015 (Revision History, PDF p. 27) · PDF p.1, Placement drawing and Pin Definition, SPI Mode columns

Transcend USDC10I — Native SD mode

Device-specific wiring. Check your device’s manual before connecting or applying power.

View and evidence limits

Card contact-side placement drawing on PDF p. 1, contacts toward top; microSD contacts are numbered 1-8 left to right.

P062 microSD — **Agree** on all eight native/SPI positions, but **same source** — Same Transcend USDC10I V1.0 document, URL and hash in both. Reserved SPI 1/8 are not inferred internally disconnected. The two modes and later additional-contact systems remain separate.
UHS-II, UHS-III, SD Express/microSD Express extra contacts, optional additional power contacts, reader card-detect switches and adapter internal wiring are not established by this one-row manufacturer datasheet. These counts are not all-generation counts.

Schematic only · physical contact positions unconfirmed. Original drawing · not to scale. Scroll sideways if needed.

Transcend USDC10I — Native SD mode — source-scoped contact map
Pin	Signal	What it does	Status
1	DAT2	Control, detection or configuration connection; check the source and device.	Device-specific Sources
2	CD/DAT3	Control, detection or configuration connection; check the source and device.	Device-specific Sources
3	CMD	Control, detection or configuration connection; check the source and device.	Device-specific Sources
4	VDD	Power connection (VDD). Check the specified supply.	Device-specific Sources
5	CLK	Clock or clock-control connection, as named by this source.	Device-specific Sources
6	VSS	Ground reference and return.	Device-specific Sources
7	DAT0	Control, detection or configuration connection; check the source and device.	Device-specific Sources
8	DAT1	Control, detection or configuration connection; check the source and device.	Device-specific Sources

Sources (1)

S716 · Transcend Information, Inc. · USDC10I Industrial High Capacity microSD Card Datasheet
V1.0, 2015-02-26 (Revision History, PDF p.27) | V1.0, February 26, 2015 (Revision History, PDF p. 27) · PDF p. 1, Placement drawing and Pin Definition table, SD Mode and SPI Mode columns

Transcend USDC10I — SPI mode

Device-specific wiring. Check your device’s manual before connecting or applying power.

View and evidence limits

Card contact-side placement drawing on PDF p. 1, contacts toward top; microSD contacts are numbered 1-8 left to right.

P062 microSD — **Agree** on all eight native/SPI positions, but **same source** — Same Transcend USDC10I V1.0 document, URL and hash in both. Reserved SPI 1/8 are not inferred internally disconnected. The two modes and later additional-contact systems remain separate.
UHS-II, UHS-III, SD Express/microSD Express extra contacts, optional additional power contacts, reader card-detect switches and adapter internal wiring are not established by this one-row manufacturer datasheet. These counts are not all-generation counts.

Schematic only · physical contact positions unconfirmed. Original drawing · not to scale. Scroll sideways if needed.

Transcend USDC10I — SPI mode — source-scoped contact map
Pin	Signal	What it does	Status
1	RSV	Reserved; no general-purpose wiring is established.	Device-specific Sources
2	CS	Control, detection or configuration connection; check the source and device.	Device-specific Sources
3	DI	Control, detection or configuration connection; check the source and device.	Device-specific Sources
4	VDD	Power connection (VDD). Check the specified supply.	Device-specific Sources
5	SCLK	Clock or clock-control connection, as named by this source.	Device-specific Sources
6	VSS	Ground reference and return.	Device-specific Sources
7	DO	Control, detection or configuration connection; check the source and device.	Device-specific Sources
8	RSV	Reserved; no general-purpose wiring is established.	Device-specific Sources

Sources (1)

S716 · Transcend Information, Inc. · USDC10I Industrial High Capacity microSD Card Datasheet
V1.0, 2015-02-26 (Revision History, PDF p.27) | V1.0, February 26, 2015 (Revision History, PDF p. 27) · PDF p. 1, Placement drawing and Pin Definition table, SD Mode and SPI Mode columns

Unknowns stay unknown.

Socket pad positions, terminal numbering, tolerances, keep-outs and insertion forces are not established.
Capacity-family support, enabled bus mode and speed class require exact card and host documentation.
Additional-row contacts are not represented by this conventional first-row contact count.
No electrical limits, initialization sequence, wiring procedure or fabrication approval are supplied.
SPI-mode roles differ; the displayed native SD functions must not be reused as an SPI wiring table. Extended data-line behavior at startup is not a completed operational design.

Your next step

Use the detail without guessing past its limits.

Read the connector field note Recognition clues and practical checks.Work through a connection Keep exact equipment and cable requirements separate.

Source trail

Claims and sources

Back to first citation ↑

C062Bsource checked

The SD Association lists a nominal microSD envelope of 15 × 11 × 1.0 mm (length × width × thickness). Conventional single-row cards for Default Speed, High Speed and UHS-I use eight contacts.

SD Association · SD Standard Overview ↗
Conventional-card paragraph and form-factor table: first-row counts and UHS-II / SD Express count ranges · Counts are scoped to named modes. The overview does not identify an exact card or host, and extra-row count does not establish implemented protocol.

SD Association · Capacity: SD, SDHC, SDXC and SDUC ↗
Capacity ranges, file-system table and Form Factor Size rows · Nominal card envelopes are identification aids, not mechanical tolerances, socket footprints, pad positions or formatting instructions.

C062Csource checked

The SD Association overview distinguishes microSD contact counts by interface: High Speed/UHS-I eight, UHS-II sixteen, and one-lane microSD Express sixteen to seventeen.

C062Dsource checked

Swissbit S-46u Revision 1.00, page 8, gives this native SD-mode assignment in Figure 2 bottom-view numbering: 1 DAT2, 2 CD/DAT3, 3 CMD, 4 VDD, 5 CLK, 6 VSS, 7 DAT0, 8 DAT1. The same table gives different SPI-mode functions on several pads.

Swissbit AG (manufacturer document hosted by Farnell) · S-46u Industrial MICRO SD/SDHC Memory Card — Revision 1.00 ↗
Page 8, Figure 2 bottom view and Table 11 native SD / SPI pad assignments · Distributor-hosted manufacturer PDF, not an independently authenticated original. No universal SPI, SD Express or UHS-II pinout; original 19-page document is linked, not redistributed.

C062Esource checked

The SD Association SD Express Host Implementation Guideline Version 2 (May 2025), section 4.10.2, states that microSD Express needs different connectors because the second-row pad location and size differ from microSD UHS-II.

SD Association · SD Express (SD7.x–SD8.0) Host Implementation Guideline, Version 2 — May 2025 ↗
Page 13, sections 4.10.1 and 4.10.2; context in pages 7–8 · Targeted sections only, not a full licensed specification review. No claim that every legacy, Express or multi-mode host supports another card; no fabrication approval.

C803Gsource checked

Transcend USDC10I — sd-native: original contact normalization. Statuses distinguish comparison agreement, source limits and named-device wiring.

Transcend Information, Inc. · USDC10I Industrial High Capacity microSD Card Datasheet ↗
PDF p. 1, Placement drawing and Pin Definition table, SD Mode and SPI Mode columns; PDF p.1, Placement drawing and Pin Definition, SD Mode columns; PDF p.1, Placement drawing and Pin Definition, SPI Mode columns · Source scope and unresolved evidence are preserved in the engineering variant.

C803Hsource checked

Transcend USDC10I — spi: original contact normalization. Statuses distinguish comparison agreement, source limits and named-device wiring.

C803Isource checked

Transcend USDC10I — Native SD mode: original contact normalization. Statuses distinguish comparison agreement, source limits and named-device wiring.

C803Jsource checked

Transcend USDC10I — SPI mode: original contact normalization. Statuses distinguish comparison agreement, source limits and named-device wiring.

5 source records support this profile. No independent engineering review or hardware validation is claimed.

Evidence behind this page

Scope first. Source second. Approval separate.

5 linked sources · 8 scoped claims · 0 sources with inspection/access flags.

Page scope: No new drawing. Existing unnumbered recognition artwork is unchanged and is not a pin-numbering or fabrication reference.

Assessment 2026-10-22 · earliest scheduled source review 2027-01-05. This is a recorded-date assessment, not a live source check. Page-level independent review is not established by this panel.

Inspect 5 source scopes, access limits and dates

S041 · SD Standard Overview

SD Association · Standards-organization domain · inspected 2026-10-07 · due 2027-01-05

Within inspection window

Scoped support: SD/microSD physical-form and generation-specific contact-count distinctions; no numbered assignments or fabrication drawing.

Not established / limitations: Counts are scoped to named modes. The overview does not identify an exact card or host, and extra-row count does not establish implemented protocol.

Locator: Conventional-card paragraph and form-factor table: first-row counts and UHS-II / SD Express count ranges

S042 · Capacity: SD, SDHC, SDXC and SDUC

SD Association · Standards-organization domain · inspected 2026-10-07 · due 2027-01-05

Within inspection window

Scoped support: SD capacity/file-system classes and nominal full-size SD and microSD envelopes; not host capacity approval.

Not established / limitations: Nominal card envelopes are identification aids, not mechanical tolerances, socket footprints, pad positions or formatting instructions.

Locator: Capacity ranges, file-system table and Form Factor Size rows

S391 · S-46u Industrial MICRO SD/SDHC Memory Card — Revision 1.00

Swissbit AG (manufacturer document hosted by Farnell) · Unclassified publisher domain · inspected 2026-10-07 · due 2027-01-05

Within inspection window

Scoped support: Exact Swissbit S-46u conventional microSD pin-label example; native SD-mode assignment and orientation.

Not established / limitations: Distributor-hosted manufacturer PDF, not an independently authenticated original. No universal SPI, SD Express or UHS-II pinout; original 19-page document is linked, not redistributed.

Locator: Page 8, Figure 2 bottom view and Table 11 native SD / SPI pad assignments

S392 · SD Express (SD7.x–SD8.0) Host Implementation Guideline, Version 2 — May 2025

SD Association · Standards-organization domain · inspected 2026-10-07 · due 2027-01-05

Within inspection window

Scoped support: Named-version SD Express connector/host context, particularly the different microSD Express and microSD UHS-II second-row geometry.

Not established / limitations: Targeted sections only, not a full licensed specification review. No claim that every legacy, Express or multi-mode host supports another card; no fabrication approval.

Locator: Page 13, sections 4.10.1 and 4.10.2; context in pages 7–8

S716 · USDC10I Industrial High Capacity microSD Card Datasheet

Transcend Information, Inc. · Manufacturer / product-owner domain · inspected 2026-10-21 · due 2027-01-19

Within inspection window

Scoped support: Exact named pinout variant only; not capability or compatibility approval.

Not established / limitations: Source scope and unresolved evidence are preserved in the engineering variant.

Locator: PDF p. 1, Placement drawing and Pin Definition table, SD Mode and SPI Mode columns; PDF p.1, Placement drawing and Pin Definition, SD Mode columns; PDF p.1, Placement drawing and Pin Definition, SPI Mode columns

Trace 8 claims to their source records

C062B · P062

The SD Association lists a nominal microSD envelope of 15 × 11 × 1.0 mm (length × width × thickness). Conventional single-row cards for Default Speed, High Speed and UHS-I use eight contacts.

Claim scope: Nominal microSD card identification and conventional first-row count; no inference about extra contacts, exact host support or fabrication dimensions.

Source links: S041 · S042 · Evidence trail → (private workspace)

C062C · P062

The SD Association overview distinguishes microSD contact counts by interface: High Speed/UHS-I eight, UHS-II sixteen, and one-lane microSD Express sixteen to seventeen.

Claim scope: Published overview categories inspected 2026-10-07, not an exhaustive identification method; physical contacts do not establish active bus support.

Source links: S041 · Evidence trail → (private workspace)

C062D · P062

Claim scope: Exact manufacturer-documented conventional microSD example; native SD-mode column only. Not a UHS-II/Express extra-row pinout, socket-terminal map, startup sequence or universal SPI wiring guide.

Source links: S391 · Evidence trail → (private workspace)

C062E · P062

Claim scope: microSD second-row mechanical distinction in the named guideline; not proof of compatibility or incompatibility of any complete multi-mode host product.

Source links: S392 · Evidence trail → (private workspace)

C803G · P062

Transcend USDC10I — sd-native: original contact normalization. Statuses distinguish comparison agreement, source limits and named-device wiring.

Claim scope: Pinout variant only; see comparison and per-contact status. Not fabrication approval.

Source links: S716 · Evidence trail → (private workspace)

C803H · P062

Transcend USDC10I — spi: original contact normalization. Statuses distinguish comparison agreement, source limits and named-device wiring.

Claim scope: Pinout variant only; see comparison and per-contact status. Not fabrication approval.

Source links: S716 · Evidence trail → (private workspace)

C803I · P062

Transcend USDC10I — Native SD mode: original contact normalization. Statuses distinguish comparison agreement, source limits and named-device wiring.

Claim scope: Pinout variant only; see comparison and per-contact status. Not fabrication approval.

Source links: S716 · Evidence trail → (private workspace)

C803J · P062

Transcend USDC10I — SPI mode: original contact normalization. Statuses distinguish comparison agreement, source limits and named-device wiring.

Claim scope: Pinout variant only; see comparison and per-contact status. Not fabrication approval.

Source links: S716 · Evidence trail → (private workspace)

Prepare this page for review →Read the evidence method →

Recorded evidence only. An inspection date, publisher label, source link or generated packet is not independent technical review, hardware testing, fabrication approval or a compatibility verdict.