NXP Semiconductors MC9S08QD2MSC

Overview

MC9S08QD2MSC from NXP (formerly Freescale) is an 8-bit HCS08 microcontroller designed for cost-sensitive embedded control applications. It features a 16 MHz CPU, 2048 bytes of on-chip Flash memory, 128 bytes of RAM, and integrated peripherals including a 4-channel 10-bit ADC, two timer/PWM modules (TIM1 and TIM2), and a 4-pin keyboard interrupt module. It operates in industrial temperature range (–40 °C to 125 °C) and targets low-pin-count sensor interface and motor control systems.

For engineers reviewing the MC9S08QD2MSC datasheet, MC9S08QD2MSC pinout, MC9S08QD2MSC application, or MC9S08QD2MSC equivalent, key selection considerations include its 8-pin SOIC package, single-wire background debug interface, internal clock source with FLL, COP watchdog with dedicated 32 kHz clock option, and hardware-triggerable ADC using RTI counter - all critical for space-constrained, low-power MCU designs.

Technical Context

The MC9S08QD2MSC implements the HCS08 CPU core with HC08 instruction set extension (including BGND), supporting up to 32 interrupt/reset sources and background debugging with one active breakpoint plus two additional breakpoints in the on-chip debug module. Its ICS module integrates a frequency-locked loop (FLL) with precision-trimmed internal reference (0.2% resolution, ±2% deviation over voltage/temperature).

Peripherals are tightly coupled to the CPU via a unified memory map: the 10-bit ADC supports automatic compare and internal bandgap reference; TIM1 offers dual-channel PWM with edge- or center-aligned modes; TIM2 provides single-channel PWM; and KBI enables software-configurable edge/level detection on four pins - all accessible without external components.

Key Specifications

Pinout & Package

MC9S08QD2MSC is housed in an 8-pin SOIC package (RoHS compliant), with pin assignments validated per Freescale MC9S08QD4 Series Data Sheet Rev. 7 (2022), Section 2.1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-bit microcontroller applications.

Compared with MC9S08QD2MSC, MC9S08QD4MSC offers headroom for feature expansion within the same footprint, while S9S08QD2E16M trades industrial flexibility for certified automotive robustness - making MC9S08QD2MSC optimal for cost-driven, non-automotive embedded control where memory and thermal range meet requirements.

Availability

MC9S08QD2MSC is available at Aetrix Electronics and suitable for motor control, temperature sensing, smart switch interfaces, and low-power industrial timer applications requiring stable component supply across long-lifecycle designs.

Supply support for MC9S08QD2MSC 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 company formed from the spin-off of Freescale Semiconductor and Philips' semiconductor division, specializing in secure connectivity solutions for automotive, industrial, and IoT markets.

The MC9S08QD2MSC belongs to the HCS08 QD-series microcontrollers, engineered for ultra-low-cost, ultra-small-footprint embedded control in resource-constrained environments such as appliance subsystems and sensor nodes.

FAQ

What is the maximum operating frequency of the MC9S08QD2MSC?

The MC9S08QD2MSC features an HCS08 CPU core with a maximum bus frequency of 16 MHz. This speed is achieved using the internal clock source (ICS) with its frequency-locked loop (FLL), which can be configured to generate a stable 16 MHz clock from the trimmed internal reference oscillator - no external crystal required. The MC9S08QD2MSC maintains this performance across its full industrial temperature range (–40 °C to +125 °C).

Does the MC9S08QD2MSC support in-circuit debugging?

Yes, the MC9S08QD2MSC supports single-wire background debug (BDM) via the BKGD/MS pin. This interface enables full in-circuit programming, real-time register inspection, breakpoint setting (one active + two in debug module), and memory read/write operations without halting system operation. The MC9S08QD2MSC requires only this pin and ground for debug connectivity, minimizing board routing complexity.

What are the memory resources available on the MC9S08QD2MSC?

The MC9S08QD2MSC integrates 2048 bytes of on-chip Flash memory for program storage and 128 bytes of RAM for runtime data. Flash supports read/program/erase over full operating voltage (2.7–5.5 V) and temperature range, with block protection to prevent accidental corruption. RAM is volatile and used for stack, variables, and temporary buffers - sufficient for lightweight control algorithms and sensor data handling in compact embedded systems.

Can the MC9S08QD2MSC operate without an external crystal?

Yes, the MC9S08QD2MSC can operate entirely from its internal clock source (ICS) module, which includes a frequency-locked loop (FLL) and precision-trimmed internal reference. This eliminates the need for external crystals, resonators, or capacitors - reducing BOM cost and PCB area. The ICS delivers 0.2% resolution and ±2% deviation over voltage and temperature, enabling reliable 16 MHz operation in most industrial applications.

What peripheral modules are integrated into the MC9S08QD2MSC?

The MC9S08QD2MSC integrates a 4-channel 10-bit ADC with internal bandgap reference and hardware trigger from RTI; two timer/PWM modules (TIM1 with 2 channels, TIM2 with 1 channel); a 4-pin keyboard interrupt (KBI) module with configurable edge/level detection; and system-level features including COP watchdog, low-voltage detect, and illegal opcode/address protection - all accessible through its 8-pin SOIC package.