NXP Semiconductors MC9S12D64CFU

Overview

MC9S12D64CFU from NXP (formerly Freescale) is a 16-bit HCS12 microcontroller with 64 KB on-chip Flash, 4 KB RAM, and integrated CAN 2.0A/B controller, designed for automotive body control and industrial embedded applications requiring deterministic real-time response. It operates at up to 25 MHz bus frequency, supports 5V I/O tolerance, and includes dual 10-bit ATD converters with 16 input channels.

For engineers reviewing the MC9S12D64CFU datasheet, MC9S12D64CFU pinout, MC9S12D64CFU application, or MC9S12D64CFU equivalent, key selection criteria include its 80-pin QFP package, background debug interface (BDM), 16-channel analog input capability, CAN protocol support, and compatibility with legacy S12 toolchains and development environments.

Technical Context

The MC9S12D64CFU implements the HCS12 CPU12 core with 16-bit data path and 24-bit address space, executing instructions in single-cycle or multi-cycle modes depending on addressing. Its memory map supports single-chip, expanded, and special test modes, with Flash programmable in 2-KB blocks and EEPROM emulated in Flash.

System timing derives from an external crystal (1–8 MHz) or oscillator feeding a PLL that generates a stable 50 MHz internal clock, divided down to a configurable bus clock (up to 25 MHz). The CRG block provides reset generation, clock monitoring, and low-power mode entry/exit control with STOP, WAIT, and PSEUDO-STOP states.

Key Specifications

Pinout & Package

MC9S12D64CFU is housed in an 80-pin Quad Flat Package (QFP), 14 mm × 14 mm body, 0.65 mm lead pitch, RoHS-compliant. Pin assignments match the MC9S12DJ64 derivative per Freescale Document Number 9S12DJ64DGV1/D, with full signal multiplexing across Ports A, B, E, H, J, K, M, P, S, and T.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit automotive microcontroller applications.

Compared with MC9S12XDP512 and S912ZVL64F0MLFR, the MC9S12D64CFU offers proven reliability in cost-sensitive body electronics with minimal peripheral overhead, while lacking safety certification and advanced connectivity-making it optimal for established designs where footprint, toolchain continuity, and qualification history are prioritized.

Availability

MC9S12D64CFU is available at Aetrix Electronics and suitable for automotive body control, industrial motor interface, heavy-duty instrument clusters, and off-road telematics gateways requiring stable component supply and long-term production support.

Supply support for MC9S12D64CFU 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

NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT markets, with deep heritage in microcontroller innovation.

The MC9S12D64CFU belongs to the HCS12 family, engineered for deterministic real-time control in harsh automotive environments-emphasizing robustness, CAN integration, and field-proven toolchain compatibility.

FAQ

What is the maximum bus clock frequency supported by the MC9S12D64CFU?

The MC9S12D64CFU supports a maximum bus clock frequency of 25 MHz. This is achieved using the on-chip Phase-Locked Loop (PLL) to multiply an external crystal or oscillator input (1–8 MHz) and then dividing the resulting internal clock. The 25 MHz bus clock directly governs instruction execution speed, peripheral timing, and ATD conversion rates in the MC9S12D64CFU.

Does the MC9S12D64CFU include built-in CAN functionality?

Yes, the MC9S12D64CFU integrates one MSCAN module compliant with CAN 2.0A/B protocol standards. It supports bit rates up to 1 Mbit/s, features 15 message buffers with priority arbitration, automatic retransmission, and error confinement. The CAN interface uses dedicated pins PJ6 (RXCAN0) and PJ7 (TXCAN0), and requires external termination resistors per ISO 11898-2.

What package type and pin count does the MC9S12D64CFU use?

The MC9S12D64CFU is packaged in an 80-pin Quad Flat Package (QFP) with 0.65 mm lead pitch and 14 mm × 14 mm body size. This matches the pinout defined in Freescale's MC9S12DJ64 Device User Guide (Document Number 9S12DJ64DGV1/D), supporting full signal multiplexing across 10 I/O ports and dedicated peripheral functions including CAN, SCI, SPI, and ATD.

Can the MC9S12D64CFU operate with a 3.3V supply?

No, the MC9S12D64CFU requires a nominal 5V supply (4.5 V to 5.5 V) for VDDX, VDDR, and VDD1/VDD2 domains. Its I/O pins are 5V-tolerant, and the internal voltage regulator (enabled via VREGEN) generates 3.3V for core logic-but this is not an external supply input. Applying 3.3V to VDD pins will prevent proper operation and may damage the device.

Is there on-chip debug capability in the MC9S12D64CFU?

Yes, the MC9S12D64CFU includes a Background Debug Module (BDM) accessible via the BKGD pin. This single-wire interface enables full in-circuit debugging-including breakpoints, register inspection, memory read/write, and Flash programming-without halting real-time operation or requiring JTAG hardware. BDM is active in all operating modes except STOP.