Texas Instruments CP3CN17K38/NOPB

Overview

CP3CN17K38/NOPB from Texas Instruments is a reprogrammable connectivity processor featuring a CR16C RISC CPU core, 256 KB Flash program memory, 8 KB Flash data memory, and 10 KB SRAM. It integrates a full CAN 2.0B interface (up to 1 Mbps), dual 16-bit Multi-Function Timers, and Advanced Audio Interface for PCM/CVSD codec interfacing - deployed in industrial embedded gateways requiring robust serial bus coordination and low-power wake-up capability.

For engineers reviewing the CP3CN17K38/NOPB datasheet, CP3CN17K38/NOPB pinout, CP3CN17K38/NOPB application, or CP3CN17K38/NOPB equivalent, key selection criteria include its 48-pin CSP package, -40°C to +85°C industrial temperature range, CAN controller with 15 message buffers, triple clock architecture (12 MHz main + 32.768 kHz slow), and hardware DMA support across UART, AAI, and CVSD/PCM peripherals.

Technical Context

The CP3CN17K38/NOPB implements a pipelined CR16C core operating at up to 24 MHz derived from a 12 MHz external crystal via on-chip PLL, with zero-wait-state execution. Its Triple Clock and Reset module delivers three independent clocks: high-speed system clock (24 MHz), slow clock (32.768 kHz), and auxiliary clocks for peripheral timing.

Hardware peripherals are tightly coupled to the core bus: CAN, UART, Microwire/SPI, ACCESS.bus, and Advanced Audio Interface all use memory-mapped registers with single-cycle byte/word access. The four-channel DMA controller supports concurrent transfers between UART, AAI, and CVSD/PCM modules without CPU intervention.

Key Specifications

Pinout & Package

CP3CN17K38/NOPB is housed in a 48-pin Chip Scale Package (CSP) with 0.5 mm pitch and 4.0 × 4.0 mm body size. Pin functions are defined per TI SNOSA98C datasheet Section 27.2.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar connectivity processor applications.

Compared with MPC5604B and STM32F407VGT6, CP3CN17K38/NOPB uniquely combines CAN 2.0B with hardware timestamping, integrated CVSD/PCM conversion, and AAI in a compact 48-pin CSP - reducing external component count and real-time audio latency in voice-enabled industrial gateways.

Availability

CP3CN17K38/NOPB is available at Aetrix Electronics and suitable for industrial CAN gateway design, automotive diagnostic tool development, VoIP endpoint control, smart building sensor aggregation, and low-power embedded connectivity applications requiring stable component supply across extended temperature ranges.

Supply support for CP3CN17K38/NOPB 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and communications markets.

The CP3CN17 product line was designed as a reprogrammable connectivity processor targeting cost-sensitive, low-power embedded systems requiring integrated CAN, audio, and multi-protocol serial interfaces - with emphasis on rapid time-to-market via pre-integrated software tools and reference designs.

FAQ

What is the maximum CAN bit rate supported by CP3CN17K38/NOPB?

The CP3CN17K38/NOPB supports a maximum CAN bit rate of 1 Mbps, compliant with ISO 11898-2 high-speed CAN physical layer requirements. This capability is enabled by its full CAN 2.0B controller with dedicated message buffers and hardware acceptance filtering. The CP3CN17K38/NOPB achieves this rate using the 24 MHz system clock with appropriate prescaler configuration, and includes loopback and listen-only diagnostic modes for validation.

Does CP3CN17K38/NOPB support in-system programming of its Flash memory?

Yes, CP3CN17K38/NOPB supports in-system programming (ISP) of both its 256 KB Flash program memory and 8 KB Flash data memory. Programming can be performed via the JTAG Serial Debug Interface (SDI) using TI's development tools or through the UART interface in boot mode. The CP3CN17K38/NOPB internally generates required programming voltages - no external VPP supply is needed - and includes Flash protection features to prevent accidental erasure or unauthorized access.

What power modes does CP3CN17K38/NOPB offer, and how does Multi-Input Wake-Up function?

CP3CN17K38/NOPB offers four power modes: Active, Power Save, Idle, and Halt. In Halt mode, CPU and most peripherals stop but SRAM and register contents are retained. The Multi-Input Wake-Up (MIWU) module provides 16 configurable input channels that detect rising/falling edges and generate wake interrupts - enabling exit from Halt, Idle, or Power Save modes. The CP3CN17K38/NOPB allows CAN, UART, ACCESS.bus, and GPIO signals to trigger wake-up, with each channel independently maskable and prioritizable.

Is CP3CN17K38/NOPB pin-compatible with other variants in the CP3CN17 family?

No, CP3CN17K38/NOPB is not pin-compatible with LQFP-100 variants such as CP3CN17G38. It uses a 48-pin CSP package with distinct pin mapping optimized for space-constrained designs, whereas the 100-pin LQFP version exposes additional external bus signals (address/data lines, chip selects) and more GPIOs. The CP3CN17K38/NOPB omits external memory interface pins entirely - confirming its role as a self-contained connectivity processor rather than a memory-expandable microcontroller.

What audio standards does the CVSD/PCM module in CP3CN17K38/NOPB support?

The CVSD/PCM module in CP3CN17K38/NOPB supports CVSD encoding as defined in Bluetooth specification 1.0, and PCM formats including 8-bit μ-Law, 8-bit A-Law, and 13–16-bit linear PCM. It performs bidirectional hardware-accelerated conversion between CVSD and PCM streams, enabling low-latency voice processing in hands-free systems. The CP3CN17K38/NOPB routes converted audio data directly to/from the Advanced Audio Interface (AAI) without CPU involvement, leveraging dedicated DMA channels for real-time throughput.