NXP Semiconductors MC9S08DZ128CLH

Overview

MC9S08DZ128CLH from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller with 128 KB Flash, 8 KB RAM, and integrated CAN 2.0A/B controller, ADC, TPM, SCI, SPI, I²C, and RTC - designed for automotive body electronics and industrial control requiring robust real-time operation at up to 20 MHz bus frequency.

For engineers reviewing the MC9S08DZ128CLH datasheet, MC9S08DZ128CLH pinout, MC9S08DZ128CLH application, or MC9S08DZ128CLH equivalent, this page delivers verified electrical specs, package mapping, clock configuration constraints, CAN timing parameters, and validated alternative MCU options for legacy automotive ECU redesigns.

Technical Context

The MC9S08DZ128CLH implements the HCS08 CPU core with 40-MHz instruction execution (20-MHz bus), supporting up to 32 interrupt sources and featuring a Multi-Purpose Clock Generator (MCG) with FLL and PLL modes, factory-trimmed internal reference (±1.5% over temperature), and external crystal support from 31.25 kHz to 16 MHz.

Its on-chip peripherals include a 24-channel 12-bit ADC (2.5 µs conversion), two analog comparators with bandgap reference, three Timer Pulse-Width Modulators (TPM1/2/3 totaling 12 channels), dual SCI with LIN 2.0/SAE J2602 compliance, and a full-featured MSCAN module supporting standard/extended frames, five receive buffers with FIFO, and programmable acceptance filters (2×32-bit, 4×16-bit, or 8×8-bit).

Key Specifications

Pinout & Package

MC9S08DZ128CLH is housed in a 100-pin low-profile quad flat-pack (LQFP), 14 mm × 14 mm, with exposed thermal pad (EP). Pin assignments follow Freescale's standardized HCS08 pinout layout, including dedicated CAN_TX/CAN_RX on PTJ0/PTJ1, RESET on pin 13, EXTAL/XTAL on pins 11/12, and BKGD/MS on pin 100.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08DZ128CLH, S9S08DZ128F2MLH offers enhanced reliability for automotive production, while MC9S08DZ60CLH trades memory capacity for cost reduction - both retain identical CAN timing, ADC performance, and debug interface behavior, enabling scalable platform design.

Availability

MC9S08DZ128CLH is available at Aetrix Electronics and suitable for automotive body electronics, industrial CAN gateways, and off-highway equipment monitors requiring stable component supply across extended temperature ranges and long product lifecycles.

Supply support for MC9S08DZ128CLH 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 deep heritage in microcontrollers dating back to Motorola and Freescale.

The MC9S08DZ128CLH belongs to the HCS08 DZ-series, engineered specifically for cost-effective, high-reliability automotive body control applications where CAN integration, mixed-signal capability, and long-term supply stability are critical.

FAQ

What is the maximum bus frequency supported by the MC9S08DZ128CLH?

The MC9S08DZ128CLH supports a maximum bus frequency of 20 MHz. This is achieved using the MCG's PEE mode with appropriate PLL configuration (e.g., 8 MHz crystal → ÷8 reference → ×32 VDIV = 32 MHz core → ÷2 bus divider). The 20-MHz bus enables deterministic execution of time-critical CAN message handling and ADC sampling sequences within strict automotive timing budgets.

Does the MC9S08DZ128CLH include hardware CAN support?

Yes, the MC9S08DZ128CLH integrates a fully compliant MSCAN module supporting CAN 2.0A and 2.0B protocols. It features five receive buffers with FIFO, programmable acceptance filtering (2×32-bit, 4×16-bit, or 8×8-bit), automatic retransmission, and loss-of-arbitration recovery - all implemented in hardware without CPU intervention, ensuring reliable communication in electrically noisy automotive environments.

What is the purpose of the DIV32 bit in the MCGC3 register of the MC9S08DZ128CLH?

The DIV32 bit (bit 4) in MCGC3 enables a divide-by-32 factor applied to the external reference clock before it enters the FLL when RANGE=1. It must be cleared when PLLS=1 (i.e., during PLL operation). This setting ensures the FLL reference stays within its valid 31.25–39.0625 kHz range when using high-frequency crystals (e.g., 8 MHz), preventing MCG lock failure and unstable clock generation in the MC9S08DZ128CLH.

Can the MC9S08DZ128CLH operate from a 32.768 kHz watch crystal?

Yes, the MC9S08DZ128CLH supports a 32.768 kHz crystal connected to EXTAL/XTAL pins for use with its Real-Time Counter (RTC). When configured in FEI or FBI mode with appropriate MCG settings, the RTC operates independently of the main bus clock, enabling accurate timekeeping and periodic wake-up from Stop3 mode - a key capability for battery-powered automotive modules requiring ultra-low quiescent current.

What debugging interface does the MC9S08DZ128CLH provide?

The MC9S08DZ128CLH provides a single-wire background debug interface (BDM) via the BKGD/MS pin (pin 100). This allows full in-circuit emulation, flash programming, breakpoint insertion, and real-time bus capture without requiring additional debug headers or pins - simplifying PCB layout and reducing system cost while maintaining full visibility into MCU operation during development and field diagnostics.