Amlogic / 晶晨 / TECHNICAL REFERENCE
W155S2
Bluetooth and Wi-Fi combo chip with an H4 UART host interface for Bluetooth.
FPGA.io Part Number FIO-4C80256D6C34A578Internal catalogue reference · manufacturer MPN remains unchanged
Technical reference · Base device — ordering suffix not specified · Checked 2026-09-28
DOCUMENTED FACTS
Technical parameters
Values apply to the device and conditions identified in each source. Family maxima, package limits and full ordering-code specifications must not be treated as interchangeable.
| Parameter | Documented value | Source & conditions |
|---|---|---|
| Bluetooth host protocol | H4 | Amlogic-authored W155S2 Bluetooth device-tree binding (Copyright 2024 Amlogic), Linux upstream ↗description lines 9–12; clocks property lines 28–30 |
| UART interface | 4-wire | Amlogic-authored W155S2 Bluetooth device-tree binding (Copyright 2024 Amlogic), Linux upstream ↗description lines 9–12; clocks property lines 28–30 |
| Maximum UART baud rate | 4 Mbps | Amlogic-authored W155S2 Bluetooth device-tree binding (Copyright 2024 Amlogic), Linux upstream ↗description lines 9–12; clocks property lines 28–30 |
| Controller clock | 32.768 kHz | Amlogic-authored W155S2 Bluetooth device-tree binding (Copyright 2024 Amlogic), Linux upstream ↗description lines 9–12; clocks property lines 28–30 |
Official documents
Amlogic-authored W155S2 Bluetooth device-tree binding (Copyright 2024 Amlogic), Linux upstreamdescription lines 9–12; clocks property lines 28–30Web ↗Ordering and board constraints
This reference identifies a base device. Package, speed grade, temperature, qualification and packing suffixes have not been inferred.
- Verify the exact device, package, operating conditions and latest manufacturer documentation before design-in.
- Technical facts come from an Amlogic-copyrighted, Amlogic-maintained Linux upstream binding; do not infer Wi-Fi RF performance or a package suffix from this software interface reference.
- Confirm current availability and lifecycle for the complete code before procurement.
- Review pinout, electrical conditions and the exact document revision before PCB release.
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COMPLETE PART IDENTITIES
Ordering numbers for W155S2
These references belong to this device. Evidence labels distinguish reviewed specifications, public listings and manufacturer coding examples. Counts describe this site’s documented coverage, not stock or all configurations offered by the manufacturer.
Exact ordering code requires confirmation
The cited public material did not establish a literal complete ordering row in this pass. This is an evidence limit, not a claim that no code exists. The existing device identity is retained; no suffix combinations, neighboring chips, boards or systems are substituted.
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