The SST34WA32A4 is a 32 Mbit (2 Mbit x16) ComboMemory device which integrates a 32 Mbit flash with either a 16 Mbit PSRAM or 8 Mbit PSRAM in a multi-chip package (MCP). This device utilizes a single 1.8V supply and support burst mode access and address / data multiplex architecture.
The Combo Memory device features a 512 KWord uniform multi-bank flash memory architecture that consists of four banks that contain individually-erasable blocks and sectors for increased flexibility. Either the top or bottom bank, consists of 15 standard 32 KWord blocks and four parameter 8 KWord blocks for added granularity. The remaining three banks each contain uniform 32 KWord blocks. Each 32 KWord block is further divided into sixteen uniform 2 KWord sectors. Any bank can be read while another bank is being erased or programmed, with zero latency. In addition, this device provides Erase-Suspend mode during which data can be programmed to, or read from, any sector or block that is not being erased.
SST34WA32A4 supports synchronous Burst mode Read from any address location of the flash memory array; and Burst mode Read and Write from any address location of the PSRAM. The Burst modes allow the device to Read or Write sequential data with significantly shorter latency delays than during a random read or write.
To protect against inadvertent write, the flash memory bank offers an expanded Block Locking scheme. Each block can be individually locked, and the top or bottom 8 KWord parameter blocks of each boot block can be individually locked for finer granularity. In addition, a 136-words Security ID, included on the flash memory, increases system design security.
Designed, manufactured, and tested for applications requiring low power and small form factor the SST34WA32A4 is offered in an extended temperature with a small footprint package to meet board space constraints requirement.