NXP Semiconductors MC9S12B128VPVER

Overview

MC9S12B128VPVER from NXP Semiconductors (formerly Freescale) is a 16-bit automotive-grade microcontroller featuring CPU12 core, 128 KB Flash EEPROM, 4 KB RAM, 1 KB EEPROM, 16-channel 10-bit ADC, 8-channel PWM, dual SCI, SPI, I²C, and one CAN 2.0A/B software-compatible module. It operates at up to 25 MHz bus speed (50 MHz core equivalent) and targets body control modules, lighting systems, and gateway nodes in vehicle networks.

For engineers reviewing the MC9S12B128VPVER datasheet, MC9S12B128VPVER pinout, MC9S12B128VPVER application, or MC9S12B128VPVER equivalent, key selection considerations include its 112-pin LQFP package, CAN interface with five Rx/three Tx buffers, PLL-based clock generation, Wake-Up capability on Ports H/J/P, and dual-supply operation (5 V I/O + 2.5 V logic).

Technical Context

The MC9S12B128VPVER implements the CPU12 architecture-upward compatible with M68HC11 instruction set, featuring 20-bit ALU, instruction queue, and enhanced indexed addressing. Its System Integration Module (SIM) integrates CRG (clock/reset), MEBI (external bus interface), MMC (memory mapping), INT (interrupt control), BKP (breakpoints), and BDM (background debug mode).

Memory organization includes configurable Flash pages (eight × 16 KB), 4 KB RAM mappable to any 4 KB boundary, and 1 KB EEPROM mappable to any 2 KB boundary. The MSCAN12 module supports CAN 2.0A/B with flexible identifier filtering (2×32-bit/4×16-bit/8×8-bit), four dedicated interrupt channels, and low-pass filter wake-up functionality.

Key Specifications

Pinout & Package

MC9S12B128VPVER uses a 112-pin LQFP package (case no. 987), measuring 22 mm × 22 mm × 1.6 mm max height, with 0.65 mm lead pitch and gull-wing leads. It supports multiplexed 16-bit address/data bus or narrow 8-bit data mode, and features 91 total I/O lines including 22 Wake-Up-capable inputs (Port H: 8 pins; Port J: 4 pins; Port P: 8 pins; IRQ/XIRQ).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S12B128VPVER, MC9S12XDP512 and S912XEQ512J2 offer greater memory and co-processing capability but require mechanical and power delivery changes - MC9S12B128VPVER remains optimal for cost-sensitive, space-constrained automotive modules where 128 KB Flash and 112-pin footprint meet functional requirements.

Availability

MC9S12B128VPVER is available at Aetrix Electronics and suitable for automotive body electronics, lighting control, gateway nodes, and seat memory systems requiring stable component supply, long-lifecycle support, and AEC-Q100 qualified silicon.

Supply support for MC9S12B128VPVER 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 specializing in secure connectivity solutions for automotive, industrial, and IoT applications, with deep heritage in microcontroller innovation dating back to Motorola and Freescale.

The MC9S12B-Family was designed specifically for cost-optimized automotive multiplexing applications - delivering scalable memory/peripheral configurations while maintaining full pin compatibility across 64/128/256 KB variants to simplify platform development.

FAQ

What is the maximum bus speed supported by the MC9S12B128VPVER?

The MC9S12B128VPVER supports a maximum bus speed of 25 MHz, corresponding to a 50 MHz core equivalent frequency. This is achieved using the on-chip PLL circuit, which multiplies the external crystal oscillator input (0.5–16 MHz) to generate the required system clock. The bus speed directly determines timing for memory accesses, peripheral operation, and instruction execution cycles in the CPU12 core.

Does the MC9S12B128VPVER include an integrated CAN controller?

Yes, the MC9S12B128VPVER includes one MSCAN12 module compliant with CAN 2.0A/B specifications, supporting bit rates up to 1 Mbps. It provides five receive buffers and three transmit buffers, flexible identifier filtering (configurable as 2×32-bit, 4×16-bit, or 8×8-bit), and dedicated interrupt channels for receive, transmit, error, and wake-up events - all implemented in hardware without CPU intervention.

What package type and pin count does the MC9S12B128VPVER use?

The MC9S12B128VPVER uses a 112-pin LQFP package (case number 987), measuring 22 mm × 22 mm with 0.65 mm lead pitch. It is not pin-compatible with the 80-pin QFP variant of the MC9S12B-Family. The 112-pin version provides 91 usable I/O lines, including 22 Wake-Up capable inputs distributed across Ports H, J, P, IRQ, and XIRQ.

Can the MC9S12B128VPVER operate from a single 5 V supply?

No - the MC9S12B128VPVER requires dual supplies: 5 V for I/O and analog circuitry (VDD1/VDD2/VDDA), and 2.5 V for internal core logic (VDDR). An internal 5 V to 2.5 V regulator generates VDDR, but external decoupling and proper partitioning of analog/digital ground planes (VSSA, VSS1, VSS2, VSSR) are mandatory per the datasheet layout guidelines to ensure ADC accuracy and noise immunity.

Is background debug supported on the MC9S12B128VPVER?

Yes, the MC9S12B128VPVER supports single-wire Background Debug Mode (BDM) via the BKGD/MODC pin. This allows full non-intrusive debugging - including breakpoint setting, register inspection, memory read/write, and flash programming - without halting real-time operation or requiring additional debug hardware beyond a BDM interface cable.