SPRUIU1C July 2020 – February 2024 DRA821U , DRA821U-Q1
The Octal Serial Peripheral Interface (OSPI) module is a kind of Serial Peripheral Interface (SPI) module which allows single, dual, quad, or octal read and write access to external flash devices.
The OSPI module is used to transfer data, either in a memory mapped direct mode (for example a processor wishing to execute code directly from external flash memory), or in an indirect mode where the module is set-up to silently perform some requested operation, signaling completion via interrupts or status registers. For indirect operations, data is transferred between system memory and external flash memory via an internal SRAM which is loaded for writes and unloaded for reads by a device controller at low latency system speeds. Interrupts or status registers are used to identify the specific times at which this SRAM is accessed using user programmable configuration registers.
Table 12-3908 shows the OSPI allocation across device domains.
Instance | Domain | ||
WKUP | MCU | MAIN | |
MCU_FSS0_OSPI0 | - | ✓ | - |
Figure 12-1972 shows the OSPI module overview.