NXP Semiconductors MC9S12B128CPVER

Overview

MC9S12B128CPVER from Freescale Semiconductor is a 16-bit automotive-grade Flash 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 module - deployed in body control modules and powertrain gateways requiring deterministic real-time response.

For engineers reviewing the MC9S12B128CPVER datasheet, MC9S12B128CPVER pinout, MC9S12B128CPVER application, or MC9S12B128CPVER equivalent, key selection criteria include CAN software compatibility, 112-pin LQFP package with Wake-Up-capable I/O (ports H, J, P), PLL-based bus speed scaling up to 25 MHz, and BDM debug support for production firmware validation.

Technical Context

The MC9S12B128CPVER implements the CPU12 core with M68HC11 instruction set compatibility, 20-bit ALU, and instruction queue - enabling legacy code portability while supporting enhanced indexed addressing and interrupt stacking. Its System Integration Module (SIM) integrates CRG (clock/reset), MEBI (external bus interface), MMC (memory mapping), and INT (interrupt control) on-die.

It supports multiplexed 16-bit address/data bus in single-chip or expanded modes, with optional 8-bit narrow mode for cost-sensitive designs. The MSCAN12 module delivers 1 Mbps CAN communication with five RX/ three TX buffers, programmable identifier filters (2×32-bit, 4×16-bit, or 8×8-bit), and dedicated Rx/Tx/error/wake-up interrupt channels.

Key Specifications

Pinout & Package

MC9S12B128CPVER is housed in an 112-pin LQFP (case no. 987), 20 mm × 20 mm body, 0.65 mm pitch, with exposed thermal pad. I/O pins support 5 V tolerant digital operation and 5 V A/D inputs; dual supply: 5 V for I/O/A/D, 2.5 V internal logic regulated from integrated 5 V → 2.5 V regulator.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S12B128CPVE, the MC9S12B128CPVER offers extended temperature qualification critical for under-hood placement, while S912XDP512J1MAL provides architectural scalability at the cost of PCB redesign - making MC9S12B128CPVER optimal for drop-in reliability upgrades in existing BCM/gateway platforms.

Availability

MC9S12B128CPVER is available at Aetrix Electronics and suitable for automotive body control modules, powertrain gateways, instrument clusters, and roof module control units requiring stable component supply across extended lifecycle programs.

Supply support for MC9S12B128CPVER 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 automotive, industrial, and networking processors and analog solutions.

The MC9S12B-Family was designed specifically for automotive multiplexing applications - delivering scalable memory/peripheral configurations, CAN integration, and robust debug infrastructure for ECU development and production deployment.

FAQ

What is the maximum bus speed supported by the MC9S12B128CPVER?

The MC9S12B128CPVER supports a maximum bus speed of 25 MHz, achieved using its on-chip phase-locked loop (PLL) to multiply a 0.5–16 MHz crystal input. This speed applies in both single-chip and expanded bus modes, and is confirmed in the HCS12B Family Product Brief Rev. 2.8. The MC9S12B128CPVER's PLL allows dynamic adjustment to balance performance and power consumption based on real-time system demands.

Does the MC9S12B128CPVER support CAN FD or only classical CAN?

The MC9S12B128CPVER implements the MSCAN12 module, which is compliant only with CAN 2.0A and 2.0B protocols - supporting up to 1 Mbps classical CAN with software compatibility across the HCS12 family. It does not support CAN FD features such as flexible data-rate or extended payload length, as confirmed in the official Freescale product brief and peripheral specification tables.

What package type and pin count does the MC9S12B128CPVER use?

The MC9S12B128CPVER uses a 112-pin LQFP package (case number 987), measuring 20 mm × 20 mm with 0.65 mm pitch and an exposed thermal pad. This matches the "112LQFP" variant listed in Table 1 of the HCS12B Family Product Brief, and is distinct from the 80-pin QFP option used by other members of the same family.

How many I/O pins with Wake-Up capability does the MC9S12B128CPVER have?

The MC9S12B128CPVER provides 22 Wake-Up capable I/O pins: 8 on Port H, 4 on Port J, and 8 on Port P (shared with PWM functionality), plus IRQ and XIRQ pins - totaling 22 interrupt-capable inputs for STOP/WAIT mode wake-up. This is explicitly documented in the "Wake-up interrupt inputs" section and pin assignment diagrams for the 112-pin version.

Is the MC9S12B128CPVER pin-compatible with other MC9S12B-Family devices?

Yes, all MC9S12B-Family members - including MC9S12B128CPVER, MC9S12B256, and MC9S12B64 - are fully pin-compatible within the same package variant (e.g., 112LQFP). This enables scalable design reuse: users can migrate between memory/peripheral configurations without changing PCB layout, as stated in the Introduction and confirmed in Table 1 of the Freescale HCS12B Family Product Brief.