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Texas Instruments TMS320C25GBL
- Part No.:
- TMS320C25GBL
- Manufacturer:
- Texas Instruments
- Category:
- DSP (Digital Signal Processors)
- Package:
- 68-BCPGA Exposed Pad
- Datasheet:
-
TMS320C25GBL.pdf
- Description:
- IC DSP 68-CPGA
- Quantity:
- Payment:
- Shipping:
Inventory:2,724
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Product details
Overview
TMS320C25GBL from Texas Instruments is a second-generation 16-bit CMOS digital signal processor (DSP) designed for real-time signal processing in embedded control and communications systems. It delivers 100-ns instruction cycle time, 544 words of on-chip data RAM, 4K words of on-chip program ROM, 32-bit ALU/accumulator, and 16×16-bit hardware multiplier with 32-bit product - enabling efficient FFT, filtering, and adaptive control in telecom and industrial motor drives.
For engineers reviewing the TMS320C25GBL datasheet, TMS320C25GBL pinout, TMS320C25GBL application, or TMS320C25GBL equivalent, key selection considerations include its 68-pin PGA package, object-code compatibility with TMS32020, on-chip serial port for codec interfacing, bit-reversed addressing for radix-2 FFTs, and single 5-V supply operation in commercial temperature range.
Technical Context
The TMS320C25GBL implements a modified Harvard architecture with separate program and data buses, enabling concurrent instruction fetch and execution while allowing inter-space data transfers. Its memory map supports dynamic configuration of 256-word Block B0 as either program or data memory via CNFD/CNFP instructions.
It integrates an on-chip 16-bit timer clocked by CLKOUT1, double-buffered serial port with independent transmit/receive shift registers (DXR/DRR), and eight auxiliary registers with dedicated arithmetic unit for efficient indirect addressing - including bit-reversed mode optimized for fast Fourier transforms.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Instruction Cycle Time | 100 ns - enables 10 MIPS throughput for real-time control loops and audio sampling at up to 48 kHz. |
| On-Chip Data RAM | 544 × 16-bit words - sufficient for dual 256-point data buffers plus 32-word scratch space in FFT or FIR implementations. |
| On-Chip Program Memory | 4K × 16-bit ROM - provides secure, non-volatile boot code and fixed algorithms without external EPROM dependency. |
| ALU/Accumulator | 32-bit - supports extended-precision arithmetic and normalization for fixed-point DSP without software emulation overhead. |
| Hardware Multiplier | 16 × 16-bit with 32-bit product - executes multiply-accumulate in one cycle, critical for filter taps and correlation kernels. |
| Serial Port | Full-duplex, double-buffered - interfaces directly to TI TCM300x codecs or AD73311 without glue logic; supports synchronous frame sync (FSX/FSR). |
| Address/Data Bus | 16-bit address, 16-bit data - accesses 128K total memory space (64K program + 64K data), with wait-state support for slow peripherals. |
Pinout & Package
Package: 68-pin ceramic pin grid array (PGA), GB variant - hermetically sealed, suitable for industrial environments with thermal stability and low parasitic inductance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A15 | Address bus outputs | 16-bit multiplexed address lines for external memory and I/O mapping; driven during PS/DS/IS select cycles. |
| D0–D15 | Data bus bidirectional I/O | 16-bit multiplexed data path shared across program, data, and I/O spaces; high-impedance during HOLD. |
| CLKOUT1 / CLKOUT2 | Master clock outputs | CLKOUT1 = crystal/CLKIN ÷ 4; used to clock on-chip timer and synchronize peripherals; CLKOUT2 provides secondary timing reference. |
| FSX / FSR / DX / DR / CLKX / CLKR | Serial port interface | Full-duplex synchronous serial signals - FSX/FSR frame sync, DX/DR data, CLKX/CLKR clocks - enable direct codec connection. |
| INT0–INT2 | Maskable external interrupts | Three priority-level user interrupts for event-driven control (e.g., ADC EOC, encoder index pulse, watchdog timeout). |
| HOLD / HOLDA | DMA arbitration control | HOLD request initiates high-Z bus state; HOLDA acknowledges - allows external DMA controller to access external memory without halting on-chip ROM execution. |
| MP/MC | Mode select input | Configures microprocessor (MP=1) or microcomputer (MC=0) memory map; determines on-chip ROM visibility and interrupt vector placement. |
| READY | External wait-state input | Stretches bus cycles when interfacing to slow memories or peripherals - ensures reliable read/write timing without firmware delay loops. |
Key Features
| Feature | Design Value |
|---|---|
| Bit-reversed indexed addressing | Hardware-accelerated address generation for radix-2 FFTs - eliminates software bit-manipulation overhead and reduces loop count by 50%. |
| Repeat instruction (RPT/RPTK) | Executes any instruction up to 256 times in hardware - converts multicycle block moves or MACs into single-cycle-per-iteration operations. |
| Eight auxiliary registers (AR0–AR7) | Enables complex indirect addressing with auto-increment/decrement and post-indexing - essential for circular buffers and coefficient tables in filters. |
| On-chip 16-bit timer with period register | Generates precise periodic interrupts (TINT) at intervals defined by PRD register - used for sample-rate timing, PWM generation, or scheduler ticks. |
| Object-code compatibility with TMS32020 | Runs NMOS-based TMS32020 binaries without recompilation - simplifies migration to lower-power CMOS while preserving legacy firmware investment. |
Applications
| Telecom Voice Coding | Industrial Motor Control |
|---|---|
Use Scenario: Real-time G.721 ADPCM encoding/decoding in channel banks or PBX line cards. IC Role / Device Role / Timing Role: Primary DSP executing adaptive prediction, quantization, and inverse filtering; synchronized to 8-kHz sampling clock via CLKR/FSR. Use Value: On-chip 4K ROM stores codec algorithm; 544-word RAM holds two 256-sample buffers; 100-ns cycle enables sub-100-μs loop latency. |
Use Scenario: Field-oriented control (FOC) of 3-phase AC induction motors in HVAC blowers or pump drives. IC Role / Device Role / Timing Role: Real-time current/voltage sampling, Clarke/Park transforms, PI regulation, and SVPWM generation at 10–20 kHz switching frequency. Use Value: 32-bit accumulator prevents overflow in flux estimation; bit-reversed addressing accelerates Park transform matrix lookups; serial port interfaces to isolated ADCs. |
| Audio Signal Processing | Military Communications |
Use Scenario: Digital audio effects (reverb, chorus) in professional mixing consoles using 44.1/48 kHz streams. IC Role / Device Role / Timing Role: Dedicated audio DSP handling multi-tap FIR filtering, delay-line management, and level detection; clocked from external audio PLL. Use Value: Double-buffered serial port handles simultaneous stereo I/O; repeat instructions optimize convolution kernels; 16×16 multiplier computes filter coefficients in real time. |
Use Scenario: Secure voice encryption in tactical radios using NSA-approved algorithms implemented in ROM. IC Role / Device Role / Timing Role: Tamper-resistant cryptographic engine performing real-time DES/A5 ciphering; operates in MC mode with protected ROM execution. Use Value: On-chip 4K ROM contains hardened crypto routines; no external memory access required during encryption; 5-V supply ensures compatibility with legacy military power rails. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital signal processor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMS320C25-50 | 80-ns instruction cycle (vs. 100 ns); identical pinout and ROM size; higher power consumption (500 mW vs. same). | Required for >12.5 MIPS throughput in high-sample-rate radar or wideband comms; not needed for 8–16 kHz voice or motor control. | Select TMS320C25-50 only when cycle budget demands sub-100-ns latency; verify thermal design for increased dissipation. |
| TMS320E25 | Replaces 4K ROM with 4K EPROM; requires VPP programming voltage; otherwise identical architecture and timing. | Suitable for prototyping and field-upgradable systems where algorithm changes are frequent; unsuitable for production with fixed firmware. | Choose TMS320E25 for development and small-batch deployments; use TMS320C25GBL for volume production with immutable, secure code. |
Compared with TMS320C25-50 and TMS320E25, the TMS320C25GBL offers optimal balance of deterministic 100-ns performance, ROM-based security, and industrial-grade PGA packaging - making it the preferred choice for cost-sensitive, high-reliability embedded DSP applications requiring zero-field updates.
Availability
TMS320C25GBL is available at Aetrix Electronics and suitable for telecom infrastructure, industrial motor drives, audio equipment, and military comms systems requiring stable component supply across long-lifecycle programs.
Supply support for TMS320C25GBL includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader founded in 1930, specializing in analog, embedded processing, and digital signal processing technologies with over 90 years of innovation in high-reliability components.
The TMS320C2x family was designed specifically for real-time signal processing in resource-constrained embedded systems - emphasizing hardware acceleration of math-intensive operations, low-power CMOS efficiency, and seamless integration with analog front-ends and communication peripherals.
FAQ
What is the operating temperature range for the TMS320C25GBL?
The TMS320C25GBL is specified for commercial temperature operation from 0°C to +70°C. Its GB suffix denotes the ceramic PGA package variant rated for this range; military-grade versions (e.g., TMS320C25GBA) extend to –40°C to +85°C but require separate qualification and sourcing.
Does the TMS320C25GBL support in-circuit debugging or JTAG?
No, the TMS320C25GBL does not include JTAG or IEEE 1149.1 debug interface. Debugging relies on external emulators connected via the parallel bus interface, using the HOLD/HOLDA and READY signals to halt and probe memory and registers - consistent with 1990-era DSP development practices.
Can the TMS320C25GBL execute code from external memory without wait states?
Yes, the TMS320C25GBL runs at full speed (100-ns cycle) when executing from on-chip 4K ROM or fast external program memory. Wait states are only inserted when accessing slower off-chip memory, controlled dynamically via the READY signal - allowing flexible memory hierarchy design without performance penalty for on-chip execution.
What is the function of the MP/MC pin on the TMS320C25GBL?
The MP/MC pin selects between microprocessor (MP=high) and microcomputer (MC=low) memory mapping modes. In MC mode - default for TMS320C25GBL - the 4K on-chip ROM is mapped into program space starting at address 0x1000, and interrupt vectors are relocated to on-chip locations, enabling standalone operation without external boot ROM.
Is the TMS320C25GBL pin-compatible with the TMS32020?
Yes, the TMS320C25GBL is pin-for-pin compatible with the TMS32020 NMOS DSP. All signal names, pin positions, and electrical timing (except cycle time and power) match exactly - enabling drop-in replacement in existing PCB layouts while reducing power consumption by ~60% and improving noise immunity via CMOS process.
TMS320C25GBL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- TMS320C2x
- Package/Case:
- 68-BCPGA Exposed Pad
- Packaging:
- Tube
- Product Status:
- Active
- Type:
- Fixed Point
- Interface:
- Serial Port
- Clock Rate:
- 50MHz
- Non-Volatile Memory:
- ROM (8kB)
- On-Chip RAM:
- 1kB
- Voltage - I/O:
- 5.00V
- Voltage - Core:
- 5.00V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 68-CPGA (24.38x24.38)
TMS320C25GBL FAQ
1.How can I place an order for TMS320C25GBL through Aetrix?
Please submit a Request for Quotation (RFQ) for TMS320C25GBL on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TMS320C25GBL reliable?
The price and inventory of TMS320C25GBL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMS320C25GBL is usually 5 days.
3.What payment methods are accepted for TMS320C25GBL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMS320C25GBL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMS320C25GBL?
TMS320C25GBL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMS320C25GBL order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TMS320C25GBL?
For technical support, including TMS320C25GBL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMS320C25GBL requirements.
6.How does Aetrix verify that TMS320C25GBL is sourced from the original manufacturer or authorized distributors?
All TMS320C25GBL products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TMS320C25GBL meets industry standards.
7.What is the process for return or replacement of TMS320C25GBL?
All TMS320C25GBL units undergo pre-shipment inspection (PSI). If there is an issue with TMS320C25GBL, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TMS320C25GBL part is unused and in its original packaging.
Return procedure for TMS320C25GBL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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