NXP Semiconductors MC908AP16ACFBER

Overview

MC908AP16ACFBER from Freescale Semiconductor is an 8-bit HCS08-core microcontroller with 16 KB on-chip Flash memory, 512 B RAM, and integrated peripherals including SCI, SPI, I²C, ADC (8-channel, 10-bit), and a 16-bit TIM module. It operates at up to 8 MHz bus frequency, supports 2.7–5.5 V supply, and targets embedded control in industrial sensors and motor drive interfaces.

For engineers reviewing the MC908AP16ACFBER datasheet, MC908AP16ACFBER pinout, MC908AP16ACFBER application, or MC908AP16ACFBER equivalent, key selection criteria include Flash endurance (100k erase/write cycles), internal voltage regulator support, low-power stop/wait modes, and compatibility with legacy HC08 toolchains and debug monitors.

Technical Context

The MC908AP16ACFBER implements the HCS08 CPU core with enhanced addressing modes and a 16-level hardware stack. Its Clock Generator Module (CGM) integrates a PLL for flexible bus clock synthesis from internal RC or external crystal sources, enabling precise timing control across variable load conditions.

System integration includes a System Integration Module (SIM) managing reset sources (POR, LVI, COP), interrupt prioritization across 24 vectors, and power management with configurable wait/stop modes. The ADC features programmable sample time and conversion trigger sources including TIM overflow and external pins.

Key Specifications

Pinout & Package

MC908AP16ACFBER is housed in a 44-pin QFP (Quad Flat Package) with 0.8 mm pitch and exposed thermal pad. Package dimensions are 10 mm × 10 mm × 1.4 mm, compliant with JEDEC MS-026.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC908AP32ACFBER and MC908AP8ACFBER, the MC908AP16ACFBER offers balanced Flash capacity for mid-complexity control tasks-enough for robust communication stacks and sensor fusion algorithms, yet smaller than 32 KB variants to reduce code validation scope and mask cost.

Availability

MC908AP16ACFBER is available at Aetrix Electronics and suitable for industrial sensor nodes, motor drive interfaces, smart power metering, and legacy PLC I/O modules requiring stable component supply and long-term manufacturing continuity.

Supply support for MC908AP16ACFBER 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) designed high-reliability, mixed-signal microcontrollers for automotive and industrial markets before its 2015 acquisition.

The MC908AP16ACFBER belongs to the HCS08-based AP-family targeting cost-sensitive, low-power embedded control applications where Flash density, analog integration, and toolchain maturity are critical design factors.

FAQ

What is the maximum operating frequency of the MC908AP16ACFBER?

The MC908AP16ACFBER supports a maximum bus frequency of 8 MHz, achieved via its integrated Clock Generator Module (CGM) with PLL. This frequency is derived from internal RC or external crystal sources and governs instruction execution speed, ADC conversion rate, and peripheral timing. The HCS08 core executes most instructions in 1–3 bus cycles, enabling deterministic real-time response in control loops.

Does the MC908AP16ACFBER include an internal voltage regulator?

Yes, the MC908AP16ACFBER integrates an internal 3.3 V voltage regulator accessible via the VREG pin. This regulator powers the analog subsystem-including the ADC, internal oscillator, and bandgap reference-reducing external component count and improving noise immunity. It requires a minimum 4.5 V input on VDD and delivers up to 50 mA, sufficient for on-chip analog functions without external LDOs.

How many ADC channels does the MC908AP16ACFBER support, and what is their resolution?

The MC908AP16ACFBER features an 8-channel, 10-bit successive-approximation ADC. Channels AD0–AD7 map to dedicated pins on Port C and Port D, with software-selectable reference (VDD or internal 1.2 V bandgap). Conversion time is programmable from 12 to 2048 bus cycles, allowing trade-offs between speed and resolution stability in noisy environments.

Is the MC908AP16ACFBER pin-compatible with other members of the AP-family?

Yes, the MC908AP16ACFBER is fully pin-compatible with MC908AP8ACFBER, MC908AP32ACFBER, and MC908AP64ACFBER in the 44-pin QFP package. All share identical pin assignments, electrical characteristics, and register-level peripheral configuration-enabling hardware reuse across product tiers by simply changing the Flash size variant during manufacturing.

What debug interface does the MC908AP16ACFBER support?

The MC908AP16ACFBER supports background debug mode (BDM) via a single-wire BKGD pin, compatible with standard Freescale/NXP BDM debuggers. This interface enables non-intrusive program download, breakpoint setting, register inspection, and real-time memory access without halting the CPU-critical for validating timing-critical control firmware during development and field diagnostics.