16-bit C2000 DSP with integrated motor-control peripherals
The Texas Instruments TMS320F241FNS is a 16-bit fixed-point DSP from the C24x series, built around the C2xx core running at 20 MHz. It integrates 16 KB of on-chip Flash program memory and 1K x 8 of RAM.
The TMS320F241FNS is officially classified as obsolete by Texas Instruments. No direct pin-compatible successor is listed in the available documentation.
The 20 MHz clock rate on the C2xx DSP core delivers enough throughput for single-phase and basic three-phase motor control loops, sensorless observer algorithms, and digital power conversion at switching frequencies up to tens of kilohertz. The 16 KB of on-chip Flash (8K x 16) holds a moderate control firmware image — enough for a field-oriented control (FOC) routine with CAN communication stack, but tight for complex multi-axis or safety-certified code. The 1K x 8 RAM serves as scratchpad for variables and ADC result registers; any significant data logging or lookup tables will require external memory or careful code optimization.
CANbus and serial interface complement
The TMS320F241FNS includes a CANbus controller, SCI (UART), SPI, and a separate UART/USART module. This interface set allows the DSP to serve as a node on a CAN-based industrial network (e.g., DeviceNet, CANopen) while communicating with local sensors, encoders, or an HMI via serial links. The 26 general-purpose I/O pins provide additional digital I/O for limit switches, relay drivers, or encoder index capture. The 8-channel 10-bit ADC samples analog feedback signals — current shunts, voltage dividers, thermistors — at a rate adequate for control loops with moderate bandwidth requirements.
68-PLCC package and temperature grade
Housed in a 68-lead PLCC (J-Lead) package with a 24.23 mm body, the TMS320F241FNS is a surface-mount device.