What this 1 Gbit NOR Flash is for
The Cypress S29GL01GS11DHV013 is a 1 Gbit parallel NOR Flash memory from the GL-S family, organized as 64M x 16 bits. It's built for code shadowing, firmware storage, and data logging in systems that need fast random read access and reliable non-volatile storage over a wide industrial temperature range. The 110 ns access time and parallel interface make it a direct fit for legacy or high-reliability controller buses that expect a traditional NOR handshake — no serial translation, no extra latency.
The 110 ns access time is the time from address latch to valid data on the output pins. For a 16-bit parallel bus running at, say, 50 MHz, that's about 5.5 clock cycles of wait-state insertion if the controller expects zero-wait SRAM-like timing. Most NOR Flash controllers handle this with configurable wait states, but it's worth checking your MCU or FPGA's memory controller — some older 8-bit designs stall out past 100 ns. The 60 ns write cycle time (word/page) means page programming finishes quickly once the command sequence is issued.
Supply and temperature — no surprises
The 2.7V to 3.6V supply range covers the standard 3.3V rail with margin for droop. No level shifters needed if the host is 3.3V logic.
No official second-source cross-reference is listed, but the GL-S family is widely used, and independent distribution can supply it.