Infineon Technologies S29WS128P0PBFW000

Overview

S29WS128P0PBFW000 from Cypress Semiconductor is a 128 Mb (8 M × 16-bit) 1.8 V simultaneous read/write NOR Flash memory using 90 nm MirrorBit™ technology, supporting zero-latency concurrent operations across two independent banks, with 104 MHz burst read capability and hardware write protection on top/bottom sectors - deployed in wireless baseband processors for firmware storage and real-time code execution.

For engineers reviewing the S29WS128P0PBFW000 datasheet, S29WS128P0PBFW000 pinout, S29WS128P0PBFW000 application, or S29WS128P0PBFW000 equivalent, key selection criteria include 1.7–1.95 V single-supply operation, 84-ball FBGA (11.6 mm × 8 mm) package compatibility, synchronous/asynchronous mode flexibility, CFI compliance, and advanced sector protection with password/persistent lock mechanisms.

Technical Context

This device implements a sixteen-bank architecture with 126 × 64 Kword uniform sectors plus four 16 Kword boot sectors at top and bottom, enabling dual-boot configuration and secure silicon sector partitioning (128 words factory + 128 words customer). It supports both burst and page read modes with 20 ns intra-page access and 7.6 ns burst access time.

Simultaneous read/write is achieved via physically separate address/data paths per bank and handshaking through RDY output; program/erase suspend/resume commands allow background operations, while ACC input enables accelerated factory programming at V_HH.

Key Specifications

Pinout & Package

Package: 84-ball Fine-Pitch BGA (VBH084), 11.6 mm × 8 mm, MCP-compatible, lead-free (Pb-free), ball pitch 0.80 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NOR Flash memory applications.

Compared with S29WS128P0PBFW000, the S29GL128S11TFI010 trades simultaneous operation for higher voltage tolerance, while the MX29GL128FHT2I-90G sacrifices security features and concurrency to reduce bill-of-materials cost - making the S29WS128P optimal for wireless and safety-critical embedded systems demanding real-time upgradability and tamper resistance.

Availability

S29WS128P0PBFW000 is available at Aetrix Electronics and suitable for wireless baseband modules, industrial HMIs, automotive telematics units, and medical diagnostic equipment requiring stable component supply across multi-year production cycles.

Supply support for S29WS128P0PBFW000 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Cypress Semiconductor (now part of Infineon Technologies) designs high-performance, low-power memory and microcontroller solutions for embedded and connectivity applications.

The S29WS-P series targets wireless infrastructure and mobile platforms needing high-density, low-voltage NOR Flash with real-time firmware update capability and hardware-enforced security - optimized for 1.8 V battery-powered systems with strict power budgets.

FAQ

What is the function of the ACC pin on S29WS128P0PBFW000?

The ACC (Acceleration) pin operates at V_HH (typically 3.0 V) to enable unlock bypass mode and accelerate factory programming time. When driven high, it reduces single-word programming time from 40 µs to 6 µs per word using VACC. At VIL, ACC disables all program/erase functions - this pin is not used during normal system operation but is essential for high-throughput manufacturing programming.

Does S29WS128P0PBFW000 support true simultaneous read and write across the entire memory array?

No - simultaneous read/write is limited to two independent banks only, each with dedicated address/data paths. The device contains sixteen banks total (eight per die in stacked MCP variants), but concurrency is restricted to one active read bank and one active write bank at any time. This architecture enables zero-latency overlap only for operations targeting different banks, not arbitrary addresses.

How is hardware write protection implemented on S29WS128P0PBFW000?

Hardware write protection is implemented via the WP# pin, which - when pulled low - permanently disables program and erase operations in the four outermost 16 Kword sectors (two at top, two at bottom). This protection is independent of software commands and remains active even during power cycling. WP# must be held high for all other sectors and standard programming operations.

Can S29WS128P0PBFW000 be used in synchronous and asynchronous modes on the same bus interface?

Yes - the device supports both modes on the same physical bus. Mode selection is controlled by CLK signal presence and configuration register settings: CLK inactive or held static places the device in asynchronous mode; CLK toggling enables synchronous burst reads. The mode is dynamically switchable without reset, allowing mixed-mode operation within a single system boot sequence.