32 Mbit SPI NOR flash in 8-SOIC
The AT45DB321E-SHF-T is a 32 Mbit SPI serial flash from Renesas' DataFlash family, organized as 528 bytes per page across 8192 pages.
Page write and read timing
Page program time is 4 ms typical for a full 528-byte page, with a byte/word write cycle of 8 µs. The 85 MHz SPI clock gives a sustained read throughput of roughly 10 MB/s in quad-I/O mode — enough for code shadowing or data logging in an embedded system. The memory array is organized as 528-byte pages rather than the more common 256-byte or 512-byte pages found in many SPI NOR parts. This means a firmware-update routine written for a 512-byte page device needs a buffer-size adjustment to avoid partial-page writes.
Temperature grade and supply range
The SPI interface uses standard mode-0 and mode-3 polarity, and the part supports the standard Read Array (0x0B) and Fast Read (0x0C) commands common across the DataFlash family.
Active production and compliance
Availability and current pricing confirmed at RFQ time.