Infineon Technologies S29WS128P0SBFW000

Overview

S29WS128P0SBFW000 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 S29WS128P0SBFW000 datasheet, S29WS128P0SBFW000 pinout, S29WS128P0SBFW000 application, or S29WS128P0SBFW000 equivalent, key selection criteria include 1.7–1.95 V single-supply operation, 84-ball FBGA (11.6 mm × 8 mm) package compatibility, CFI compliance, 20-year data retention, and support for suspend/resume during erase/program cycles.

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 flexible firmware partitioning and dual-boot recovery. Its dual-bank design allows one bank to be read while another is programmed or erased - critical for over-the-air (OTA) updates without system interruption.

It supports synchronous burst (up to 104 MHz), asynchronous, and page read modes, with programmable linear burst lengths (8/16/32 words) and handshaking via RDY output. The ACC pin enables accelerated factory programming, while WP# provides hardware-level sector protection independent of software commands.

Key Specifications

Pinout & Package

Package: 84-ball Fine-Pitch Ball Grid Array (FBGA), 11.6 mm × 8 mm, MCP-compatible, lead-free (Pb-free), with balls arranged in 12×10 matrix (MD=12, ME=10). VCC and VCCQ must ramp simultaneously; RFU balls (e.g., F6, G8 on WS128P) are unconnected.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 1.8 V NOR Flash applications.

Compared with S29GL128S11TFI010 and MX29GL128FDTI-90G, the S29WS128P0SBFW000 uniquely combines 1.8 V operation, true simultaneous read/write, CFI compliance, and a dedicated secured silicon sector - making it the only option among the three qualified for secure, real-time firmware update architectures in wireless and industrial systems.

Availability

S29WS128P0SBFW000 is available at Aetrix Electronics and suitable for wireless baseband processors, industrial gateways, and automotive telematics control units requiring stable component supply, long-term lifecycle assurance, and Pb-free compliance.

Supply support for S29WS128P0SBFW000 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 systems, with emphasis on reliability and integration in demanding environments.

The S29WS-P series belongs to Cypress's 1.8 V simultaneous read/write NOR Flash product line, engineered specifically for wireless infrastructure and mobile platforms needing deterministic code execution alongside background firmware updates.

FAQ

What is the maximum clock frequency supported in synchronous burst read mode?

The S29WS128P0SBFW000 supports up to 104 MHz in synchronous burst read mode, achieving a 7.6 ns burst access time (tBACC). This frequency is validated under 1.7–1.95 V VCC/VCCQ and specified in the AC characteristics table (Section 11.9 of datasheet 002-01747 Rev. *B). Operation above this frequency risks timing violations and data corruption.

Does this device support x8 data bus configuration?

No. The S29WS128P0SBFW000 is strictly a x16 device with DQ15–DQ0 pins - it does not support x8 mode or data bus width reduction. The memory organization is fixed at 8 M × 16-bit (128 Mb), and all command sequences assume 16-bit data transfers. Attempting x8 operation will result in incorrect addressing and failed commands.

How is the Secured Silicon Sector accessed and protected?

The Secured Silicon Sector consists of 256 words (128 factory + 128 customer) mapped at fixed addresses outside the main array. Access requires specific unlock sequences (e.g., 0xAA, 0x55, 0x80, 0x55, 0x55, 0x55) followed by sector-specific commands. Factory words are permanently locked after initial programming; customer words can be protected via persistent bits or password, preventing overwrite even during global erase.

Can the ACC pin be left unconnected in standard operation?

Yes. The ACC pin must be held at VIH (1.7–1.95 V) during normal operation to disable acceleration and avoid unintended unlock bypass behavior. It is only driven to VHH (12 V) during factory programming. Leaving ACC floating is unsafe - it must be tied to VCC or pulled up via resistor to ensure predictable command execution and prevent accidental entry into accelerated programming mode.