256 Mbit parallel NOR Flash in a 56-TSOP — what the 100 ns access time means for the bus
The Infineon S29GL256S10TFIV20 is a 256 Mbit parallel NOR Flash from the GL-S series, organized as 16M x 16 bits and accessed through a parallel interface. The 100 ns access time sets the read-cycle window the host controller must budget; at that speed, a 16-bit microcontroller can fetch a 16-bit instruction every 100 ns without wait states, provided the bus timing closes.
Write-cycle timing and page-mode detail
Word and page writes complete in 60 ns per the write-cycle time spec. That figure is the pulse width for a single write operation, not the erase or program time — the GL-S family uses a command-based write state machine, so the host issues a write command, then polls the status register or waits for the ready/busy signal. For bulk programming, page-mode writes let you load up to 256 words per write buffer, which improves throughput over single-word writes.
Package and footprint — 56-TSOP surface mount
The part ships in a 56-TFSOP package (0.724" body width, 18.40 mm) with a surface-mount footprint. It's a tray-packaged device, so expect tube or tray handling rather than tape-and-reel — verify the pick-and-place feeder setup if you're running high-volume assembly.