NXP Semiconductors MC908AP32ACFBER

Overview

MC908AP32ACFBER from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08-core microcontroller with 32 KB on-chip Flash, 1 KB RAM, and integrated peripherals including SCI, SPI, I²C, ADC, TIM, and PWM. It operates at up to 8 MHz bus frequency, supports 2.7–5.5 V supply, and targets embedded control in industrial sensors, motor drives, and appliance subsystems.

For engineers reviewing the MC908AP32ACFBER datasheet, MC908AP32ACFBER pinout, MC908AP32ACFBER application, or MC908AP32ACFBER equivalent, this page delivers verified technical context, package mapping, functional specifications, and real-world use cases - all grounded in the official MC68HC908AP A-Family Data Sheet, Rev. 3 (October 2007).

Technical Context

The MC908AP32ACFBER implements the HCS08 CPU core with enhanced BDM debug support, a programmable PLL-based Clock Generator Module (CGM) enabling flexible bus clock derivation from internal RC or external crystal sources, and a System Integration Module (SIM) managing reset, interrupt, and low-power modes (Wait/Stop). Its memory architecture includes 32 KB Flash with block protection and 1 KB RAM.

Peripheral integration includes a 16-channel 10-bit ADC with configurable sample time, dual 8-bit timer channels supporting input capture/output compare/PWM, and full-duplex SCI with automatic baud rate detection. All modules are register-mapped and accessible via memory-mapped I/O space with dedicated interrupt vectors.

Key Specifications

Pinout & Package

MC908AP32ACFBER is housed in a 44-pin QFP (Quad Flat Package) with 0.8 mm lead pitch, compliant with JEDEC MS-026. The package supports surface-mount reflow assembly and provides thermal and mechanical stability for industrial ambient conditions.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC908AP64ACFBER, the MC908AP32ACFBER trades Flash capacity for lower unit cost and reduced power in resource-constrained nodes; versus S9KEAZN32ACFGER, it offers proven HCS08 toolchain continuity and deterministic 8-bit interrupt latency - critical for hard real-time motor timing.

Availability

MC908AP32ACFBER is available at Aetrix Electronics and suitable for industrial sensor nodes, smart appliance controllers, motor drive subsystems, and legacy equipment retrofits requiring stable component supply and long-lifecycle support.

Supply support for MC908AP32ACFBER 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 roots in Freescale's embedded MCU heritage.

The MC908AP32ACFBER belongs to the HCS08 family - designed specifically for cost-sensitive, low-power embedded control applications demanding high reliability, on-chip Flash flexibility, and mature development tool support.

FAQ

What is the maximum operating frequency of the MC908AP32ACFBER?

The MC908AP32ACFBER achieves a maximum bus frequency of 8 MHz, derived from its internal PLL circuit multiplying a reference clock (e.g., 4 MHz crystal ×2). This frequency governs instruction execution speed, peripheral timing, and ADC conversion rate - all specified and tested under 2.7–5.5 V supply and industrial temperature range (−40°C to +85°C) per the MC68HC908AP A-Family Data Sheet, Rev. 3.

Does the MC908AP32ACFBER support in-circuit debugging?

Yes, the MC908AP32ACFBER includes a Background Debug Mode (BDM) interface compatible with standard Freescale/NXP BDM pods and IDEs like CodeWarrior. This allows non-intrusive breakpoint setting, register inspection, and Flash programming without requiring a dedicated debug header - critical for rapid firmware iteration during MC908AP32ACFBER development.

How many ADC channels does the MC908AP32ACFBER have, and what is their resolution?

The MC908AP32ACFBER integrates a 10-bit successive-approximation ADC with 16 selectable input channels. Channel selection is controlled via the ADCSC1 register, and conversion results are stored in the ADCRL/ADCRH registers. The ADC supports software or hardware triggering and operates reliably across the full 2.7–5.5 V supply range, as documented in Chapter 15 of the MC68HC908AP A-Family Data Sheet, Rev. 3.

Is the MC908AP32ACFBER pin-compatible with other members of the AP-family?

Yes, the MC908AP32ACFBER shares identical 44-pin QFP pinout and register-level peripheral mapping with MC908AP64A, MC908AP16A, and MC908AP8A - enabling hardware reuse across variants. Differences are limited to Flash/RAM size and mask options; no PCB changes are needed when upgrading/downgrading within the AP-family, per Section 1.4 (Pin Assignment) and Table 24-1 (Ordering Information) in the datasheet.

What low-power modes does the MC908AP32ACFBER support, and how do they affect peripheral operation?

The MC908AP32ACFBER supports Wait and Stop modes. In Wait mode, the CPU halts but clocks remain active - preserving RAM, peripheral registers, and enabling wake-up via IRQ, KBI, or SCI activity. In Stop mode, all clocks halt except optional RTC or LPO; RAM and most registers retain state, but ADC, TIM, and SCI are suspended until wake-up reset. These modes are configured via the STOP and WAIT instructions and detailed in Chapters 4.5 and 7.6 of the datasheet.