ARM926 + C674x DSP — what this dual-core processor brings to the BOM
The Texas Instruments OMAPL138EZWTA3R is a dual-core applications processor combining an ARM926EJ-S general-purpose core with a C674x floating-point DSP on a single die. The ARM core handles OS and control tasks at 375 MHz while the DSP offloads real-time signal processing — audio, vibration analysis, motor control loops — without an external DSP chip. This architecture collapses what used to be a two-chip BOM into one 361-NFBGA package, saving board area and reducing interconnect complexity. The peripheral set is built for industrial gateway and data-acquisition roles: dual USB ports (one USB 1.1 with PHY, one USB 2.0 with PHY), a SATA 3Gbps interface for local storage, and a 10/100 Ethernet MAC for network connectivity. Additional interfaces including HPI, I²C, McASP, McBSP, MMC/SD, SPI, and UART cover sensor fusion, display (LCD controller), and legacy serial links. The SDRAM controller keeps memory cost predictable — no DDR3 layout complexity required. The 1.8V and 3.3V I/O rails let it interface directly with common sensor and memory voltage domains without level shifters on every line.
Security and boot — factory-programmed or field-locked
On-chip security features include boot authentication and cryptography acceleration, allowing encrypted firmware images and secure boot chain validation.
For a production BOM freeze, this means the part is still in TI's standard ordering system and factory pipeline — not a surplus-channel scavenge. The ROHS3 compliance covers current environmental regulations across EU and Asia markets without exemption paperwork.