NXP Semiconductors MC9S08DN32MLC

Overview

MC9S08DN32MLC from NXP (formerly Freescale) is an 8-bit HCS08 microcontroller with 32 KB on-chip Flash, 2 KB RAM, and 2 KB EEPROM, featuring a 40-MHz CPU core (20-MHz bus), 12-bit ADC, dual analog comparators, RTC, SPI/I²C/SCI peripherals, and real-time interrupt capability - deployed in automotive body control modules and industrial sensor nodes.

For engineers reviewing the MC9S08DN32MLC datasheet, MC9S08DN32MLC pinout, MC9S08DN32MLC application, or MC9S08DN32MLC equivalent, key selection criteria include Flash size, integrated RTC accuracy, background debug interface support, low-power stop mode current, and LIN 2.0-compliant SCI functionality.

Technical Context

The MC9S08DN32MLC implements the HCS08 CPU core with HC08 instruction set extension (including BGND), supporting up to 32 interrupt/reset sources and executing instructions at 40 MHz core frequency with 20 MHz bus clock. Its Multi-Purpose Clock Generator (MCG) provides FLL- and PLL-based clock synthesis with internal reference trim stored in Flash and ±1.5% FLL accuracy using factory temperature compensation.

On-chip memory includes 32 KB Flash with program/erase while execute capability, 2 KB EEPROM with 4-byte dual-page or 8-byte single-page erase sectors, and 2 KB RAM. System protection features include COP watchdog with 1-kHz backup clock, selectable low-voltage detect reset/interrupt, illegal opcode/address detection, and Flash block protection.

Key Specifications

Pinout & Package

MC9S08DN32MLC is housed in a 32-pin LQFP (7×7 mm) package with 29 general-purpose I/O pins, 1 input-only pin, and dedicated power/ground/debug/clock/ADC reference pins. Pin functions are validated per Freescale MC9S08DN60 Series Data Sheet Rev 3 (2008), Section 2.1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08DN32MLC, MC9S08DN48MLC offers headroom for larger firmware images without altering hardware, while S9S08DN32F1MLC delivers improved silicon reliability and updated clock initialization - both maintain identical peripheral configuration and debug interface behavior.

Availability

MC9S08DN32MLC is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, smart lighting controls, and medical device monitors requiring stable component supply and long-term lifecycle support.

Supply support for MC9S08DN32MLC 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 applications, with roots in Freescale's microcontroller heritage.

The HCS08 family - including MC9S08DN32MLC - was designed for cost-sensitive, low-power embedded control in automotive body electronics and industrial automation where deterministic real-time response and robust debug capability are essential.

FAQ

What is the maximum operating frequency of the MC9S08DN32MLC CPU core?

The MC9S08DN32MLC CPU core operates at up to 40 MHz, with a corresponding 20-MHz bus clock frequency. This performance level supports real-time control loops in automotive and industrial applications while maintaining low power consumption. The core uses the HCS08 architecture with HC08 instruction set extensions, including the BGND instruction for background debugging. All timing specifications are validated across the full industrial temperature range (–40°C to +105°C) and supply voltage (2.7–5.5 V).

Does the MC9S08DN32MLC support LIN 2.0 communication natively?

Yes, the MC9S08DN32MLC includes a dedicated SCI module (SCI1) that fully supports LIN 2.0 Protocol and SAE J2602 compliance. It provides hardware-level extended break generation and detection, wakeup on active edge, and full-duplex NRZ framing - eliminating the need for external LIN transceivers in basic implementations. The MC9S08DN32MLC SCI1 module requires only an external LIN transceiver (e.g., TJA1020) for physical layer compliance, and its register set matches LIN 2.0 timing and frame structure requirements.

How much EEPROM memory does the MC9S08DN32MLC have, and what are its erase characteristics?

The MC9S08DN32MLC integrates 2 KB of in-circuit programmable EEPROM with two distinct erase granularities: 8-byte single-page erase and 4-byte dual-page erase. This allows efficient storage of calibration data or configuration parameters without disturbing adjacent memory locations. Erase operations can be aborted, and both program and erase functions operate while Flash code is executing - enabling seamless firmware updates and runtime parameter adjustment without halting application execution.

What debug interface does the MC9S08DN32MLC use, and how many pins are required?

The MC9S08DN32MLC uses a single-wire background debug interface accessed via the BKGD/MS pin, requiring only one dedicated PCB trace and no additional connectors or headers. This interface supports full in-circuit emulation (ICE), including real-time bus capture, breakpoint setting, register inspection, and Flash programming. No external debug adapter is needed beyond a standard BDM-compatible tool (e.g., P&E Multilink), and the interface remains functional across all power modes except deep stop states where BKGD pin is disabled.

Is the MC9S08DN32MLC pin-compatible with other devices in the DN-series?

Yes, the MC9S08DN32MLC in the 32-pin LQFP package shares identical pinout and electrical characteristics with MC9S08DN16MLC and MC9S08DN48MLC in the same package variant. This allows direct substitution within the same footprint for design flexibility - for example, upgrading from 16 KB to 32 KB Flash without layout changes. However, MC9S08DN60MLC uses a 64-pin LQFP and is not pin-compatible; migration to that variant requires PCB redesign.