M29W160EB-70N6

The M29W160EB-70N6 is a 16 megabit (2MB) 3V Boot Block NOR Flash memory from STMicroelectronics featuring a bottom boot architecture. The memory is organized as 2,097,152 bytes with boot and parameter blocks located at the bottom (low address) of the memory map — specifically one 16KB boot block, two 8KB parameter blocks, one 32KB block, and thirty-one 64KB main blocks. This architecture allows critical boot code and system parameters to be stored in separate, independently erasable blocks from the main application firmware. The device operates from a single 2.7V to 3.6V supply for all operations (read, program, erase), making it suitable for 3V system designs. With 70ns access time, it supports fast code execution directly from the Flash (XIP — execute in place). Advanced features include Write to Buffer mode for fast multi-byte programming (up to 32 bytes per buffer), Program Suspend/Resume and Erase Suspend/Resume for flexible system design, and a comprehensive status register for monitoring operation progress. Hardware data protection features include block locking and a reset/power-on state that prevents accidental writes. Packaged in a 48-pin TSOP Type N (N6 suffix), the M29W160EB-70N6 offers a compact surface-mount form factor. It is fully specified for the industrial temperature range of -40°C to +85°C, with 100,000 program/erase cycles per block and 10-year data retention. It is ideal for boot code storage, firmware, and configuration data in industrial, telecom, automotive, and portable electronic systems.

The M29W160EB is a 3V NOR Flash memory that uses floating gate charge storage technology and operates with a single supply by generating internally the higher voltages needed for program and erase operations via on-chip charge pumps. NOR architecture provides random access for read operations with 70ns access time, making it suitable for execute-in-place (XIP) code storage. The bottom boot architecture places the boot block (containing system initialization code) at the lowest address range, allowing the processor to start execution from a known location after reset. The boot block is typically protected to prevent accidental erasure of critical boot code. The memory is divided into multiple blocks of varying sizes (parameter blocks: 8KB, 16KB, 32KB; main blocks: 64KB), each independently erasable. This allows firmware updates without disturbing boot code or system parameters stored in different blocks. The device is controlled through a standard command interface. Read mode is the default after power-up. Program and erase operations are initiated by writing command sequences (unlock codes 0xAA/0x55 followed by the specific command). The Write to Buffer command allows loading up to 32 bytes into an internal buffer before programming, significantly increasing throughput compared to single-byte programming. During operations, the Status Register provides data polling (DQ7), toggle bit (DQ6), and error flag (DQ5) status to the host controller. Program/Erase Suspend allows temporarily pausing an operation to read from or program another block, then resuming the operation — useful for systems requiring minimal downtime for firmware updates. Block protection features ensure that protected blocks cannot be erased or programmed, safeguarding critical data even under fault conditions.

• 3V embedded system boot code and firmware
• Industrial PLC program storage
• Telecom line card firmware
• Automotive control units
• Portable and handheld devices
• Digital TV and STB code storage
• Medical equipment memory
• Networking equipment boot flash