SPRUIU1C July 2020 – February 2024 DRA821U , DRA821U-Q1
pSRAM devices are SRAM-pin-compatible low-power memories that contain a self-refreshed DRAM memory array. The GPMC_CONFIG1_i[11-10] DEVICETYPE bit field (where i = 0 to 3) must be set to 0b00.
The pSRAM device uses the NOR protocol. It supports the following operations:
pSRAM devices must be powered up and initialized in a predefined manner according to the specifications of the attached device.
pSRAM devices can be programmed to use either mode: fixed or variable latency. pSRAM devices can automatically schedule autorefresh operations, which force the GPMC to use its WAIT signal capability when read or write operations occur during an internal self-refresh operation, or they can automatically include the autorefresh operation in the access time. These devices do not require additional WAIT signal capability or a minimum nCS high pulse width between consecutive accesses to ensure that the correct internal refresh operation is scheduled.