BY25Q32CSKJG(R)

Memory IC Overview

The BY25Q32CS is a 32M-bit Serial Peripheral Interface (SPI) NOR Flash memory manufactured by BYTe Semiconductor. It supports Standard, Dual, and Quad SPI modes as well as the 2-clock instruction cycle Quad Peripheral Interface (QPI). The device operates on a single low voltage power supply ranging from 2.7V to 3.6V. Data transfer speeds reach up to 216 Mbits/s in Dual I/O mode and 432 Mbits/s in Quad I/O mode. It features flexible architecture with 4K-byte sectors and 32/64K-byte blocks, offering software and hardware write protection capabilities.

Memory IC Feature Summary

• Supports multiple interface modes including Standard SPI, Dual SPI, Quad SPI, and QPI for optimized data throughput.
• Provides flexible memory architecture with uniform 4K-byte sectors and 32K or 64K-byte blocks for efficient erasure.
• Includes comprehensive write protection mechanisms via software commands and hardware /WP pin control.
• Features three 256-byte security registers with One-Time Programmable (OTP) lock capabilities.

Memory IC Applications

• Embedded systems requiring non-volatile code storage
• Industrial control equipment firmware
• Consumer electronics applications

Memory IC Procurement Notes

Verify the specific package variant required, such as 8-pin SOP or WSON, as availability depends on ordering information. Confirm temperature range specifications match the application environment, noting options for commercial, industrial, and extended industrial grades. Ensure compatibility with host controller SPI modes before integration.

Memory IC Selection Notes

Select this component when a 32M-bit density is required with support for high-speed Quad I/O and QPI operations. Consider the operating voltage range of 2.7V to 3.6V for system power design. Evaluate the need for hardware write protection via the /WP pin if security against accidental modification is critical for the deployment scenario.

Memory IC Part Context

This part belongs to the BY25Q32 series of SPI NOR Flash memories from BYTe Semiconductor. The series is designed for applications needing reliable non-volatile storage with flexible access interfaces. The CS suffix typically denotes specific package or temperature variants within the broader product line.

Memory IC Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify electrical and pinout compatibility with existing designs before considering alternative manufacturers.

Memory IC FAQ

How does the device handle serial communication pauses?

The device supports a Hold (/HOLD) function that pauses serial communications without resetting the clocking sequence. This allows the host to temporarily suspend data transfer while keeping the device selected.

What is the purpose of the QE bit in Status Register 2?

The Quad Enable (QE) bit enables Quad SPI and QPI operations. When set to 1, it reconfigures the /WP and /HOLD pins to function as IO2 and IO3 data lines, respectively.

Can the security registers be modified after locking?

No. The Lock Bits (LB) for the security registers are One-Time Programmable (OTP). Once set to 1, the security registers become permanently read-only and cannot be unlocked or modified.