NXP Semiconductors MC9S12DJ128BCPV

Overview

MC9S12DJ128BCPV from Freescale Semiconductor is a 16-bit HCS12 microcontroller with 128 KB on-chip Flash EEPROM, 8 KB RAM, and integrated MSCAN, SPI, SCI, IIC, ATD (10-bit × 16-channel), PWM (8-channel), and ECT modules. It operates at up to 25 MHz bus clock via internal PLL, supports 5V tolerant I/O, and targets automotive body control, industrial sensor interfaces, and embedded control systems requiring CAN communication and deterministic real-time response.

For engineers reviewing the MC9S12DJ128BCPV datasheet, MC9S12DJ128BCPV pinout, MC9S12DJ128BCPV application, or MC9S12DJ128BCPV equivalent, key selection criteria include its 80-pin QFP package, dual ATD converters with external trigger support, background debug interface (BDM), on-chip voltage regulator, and derivative-specific absence of CAN1, Byteflight, and IIC blocks per documented derivative differences.

Technical Context

The MC9S12DJ128BCPV implements the HCS12 CPU core with 16-bit data path, Harvard architecture, and 24-bit addressing. Its Clock and Reset Generator (CRG) block supports crystal, external clock, or Pierce oscillator inputs and includes a programmable PLL with loop filter pin (XFC) for stable bus clock derivation.

It integrates two independent 10-bit Analog-to-Digital Converters (ATD0 and ATD1), each with 8 channels and configurable sample-and-hold timing. The device lacks CAN1, BDLC (J1850), IIC, and Byteflight peripherals - confirmed in Section 0.1 "Derivative Differences" of the Device User Guide V01.09 - distinguishing it from DT/DG/DB variants.

Key Specifications

Pinout & Package

MC9S12DJ128BCPV is housed in an 80-pin Plastic Quad Flat Pack (QFP) package (case number 987), measuring 12 mm × 12 mm × 1.4 mm, with 0.5 mm lead pitch and exposed thermal pad. Pin assignments match Figure 2-2 ("Pin Assignments in 80 QFP for MC9S12DG128B, MC9S12DJ128B Bondout") in the Device User Guide V01.09.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S12DT128CPV and S912XDP512J1MAL, the MC9S12DJ128BCPV offers optimized cost and footprint for CAN-only applications where J1850, IIC, or expanded memory are unnecessary - preserving design simplicity and supply chain continuity.

Availability

MC9S12DJ128BCPV is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor control, and embedded diagnostic tools requiring stable component supply, long-term lifecycle support, and qualified automotive-grade sourcing.

Supply support for MC9S12DJ128BCPV 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

Freescale Semiconductor (now part of NXP Semiconductors) is a fabless semiconductor company specializing in microcontrollers, analog, and connectivity solutions for automotive, industrial, and consumer markets.

The MC9S12DJ128BCPV belongs to the HCS12 family, designed specifically for cost-sensitive, real-time embedded control applications in harsh environments - emphasizing CAN reliability, on-chip regulation, and debug accessibility without external tools.

FAQ

What is the maximum bus clock frequency supported by the MC9S12DJ128BCPV?

The MC9S12DJ128BCPV supports a maximum bus clock frequency of 25 MHz, achieved via its internal Phase-Locked Loop (PLL) when driven by a 4 MHz crystal input. This frequency is validated under specified operating conditions (VDD = 4.5–5.5 V, TA = –40°C to +125°C) and is critical for meeting CAN bit timing requirements and real-time interrupt latency budgets. The MC9S12DJ128BCPV PLL configuration must comply with the loop filter design guidelines in Figure 2-3 and Table 22-1.

Does the MC9S12DJ128BCPV include an I²C interface?

No, the MC9S12DJ128BCPV does not include an Inter-IC Bus (IIC) interface. According to Table 0-1 "Derivative Differences" in the Device User Guide V01.09, the DJ variant explicitly omits IIC, CAN1, BDLC (J1850), and Byteflight modules present in other HCS12 derivatives like DT or DG. Designers requiring I²C must use external bridging or select an alternative variant such as MC9S12DT128CPV.

What package type and pin count does the MC9S12DJ128BCPV use?

The MC9S12DJ128BCPV uses an 80-pin Plastic Quad Flat Pack (QFP) package (case number 987), with 0.5 mm lead pitch and dimensions of 12 mm × 12 mm × 1.4 mm. Pin assignments are defined in Figure 2-2 of the Device User Guide V01.09 and are shared with MC9S12DG128B in bondout configuration. This package supports standard surface-mount assembly and provides thermal pad exposure for enhanced heat dissipation.

How many analog-to-digital converter (ATD) modules does the MC9S12DJ128BCPV integrate?

The MC9S12DJ128BCPV integrates two independent 10-bit Analog-to-Digital Converter (ATD) modules: ATD0 and ATD1, each with 8 input channels. Both support external trigger inputs (ETRIG0 and ETRIG1) and configurable sample-and-hold timing. This dual-ATD architecture enables time-synchronized acquisition across separate sensor domains - a key capability confirmed in Section 9 and Appendix A.2 of the Device User Guide V01.09.

Is the MC9S12DJ128BCPV pin-compatible with the MC9S12DT128CPV?

No, the MC9S12DJ128BCPV is not pin-compatible with the MC9S12DT128CPV. While both use 80-pin QFP packages, their pin functions differ significantly due to divergent peripheral sets: the DT variant includes CAN1, BDLC, and IIC signals absent in the DJ variant, resulting in different signal allocations on shared pins (e.g., Port H and Port J). Engineers must consult Figures 2-1 and 2-2 and Table 2-1 to verify signal mapping before substitution.