NXP Semiconductors MC9S08JM32CLD

Overview

MC9S08JM32CLD from NXP (formerly Freescale) is an 8-bit HCS08 microcontroller with 32 KB on-chip flash, 2 KB RAM, and integrated USB 2.0 full-speed device controller, 12-bit ADC, dual SCI/SPI/I²C, and 16-bit TPM timers - designed for embedded control in USB-connected industrial sensors and human-interface devices.

For engineers reviewing the MC9S08JM32CLD datasheet, MC9S08JM32CLD pinout, MC9S08JM32CLD application, or MC9S08JM32CLD equivalent, key selection criteria include USB device stack support, 32 KB flash with block protection, 48-MHz CPU clock, 51 GPIOs with configurable drive/slew/pullup, and Stop3 mode operation with ACMP/RTC retention.

Technical Context

The MC9S08JM32CLD implements the HCS08 CPU core with 48-MHz maximum core frequency and 24-MHz bus clock, supporting HC08 instruction set plus BGND for background debugging. Its MCG clock generator provides FLL- and PLL-based modes with internal reference trimming for stable USB timing.

It integrates a dedicated USB 2.0 full-speed transceiver with 3.3-V regulator and USBDP pull-up resistor, enabling self-powered or bus-powered device operation without external PHY. The 12-channel 12-bit ADC includes automatic compare and internal temperature sensor, while dual TPM modules support edge-aligned and centered PWM across up to 8 channels.

Key Specifications

Pinout & Package

MC9S08JM32CLD is housed in a 48-pin QFN (Quad Flat No-Lead) package with exposed thermal pad, optimized for compact industrial and USB-peripheral PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08JM32CLD, MC9S08JM60CLD offers drop-in compatibility with increased memory, while S9KEAZ128AMLH requires architectural redesign but delivers scalable performance and broader peripheral integration for next-generation USB endpoints.

Availability

MC9S08JM32CLD is available at Aetrix Electronics and suitable for industrial USB sensor nodes, human-interface devices, programmable power monitors, and embedded configuration tools requiring stable component supply and long-lifecycle support.

Supply support for MC9S08JM32CLD 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.

The MC9S08JM32CLD belongs to NXP's legacy HCS08 microcontroller family, engineered specifically for cost-sensitive, USB-integrated embedded control applications demanding low-power operation and robust in-system debug capability.

FAQ

What is the maximum operating frequency of the MC9S08JM32CLD CPU core?

The MC9S08JM32CLD CPU core operates at a maximum frequency of 48 MHz, with a corresponding 24-MHz internal bus clock. This timing is achieved via the MCG clock generator's PLL or FLL modes, and is fully validated for USB 2.0 full-speed timing compliance per the Rev. 5 datasheet. The MC9S08JM32CLD maintains deterministic execution across all supported clock configurations.

Does the MC9S08JM32CLD include an integrated USB transceiver?

Yes, the MC9S08JM32CLD integrates a full-speed USB 2.0 transceiver with on-die termination, differential receiver sensitivity, and a built-in 1.5-kΩ pull-up resistor on the USBDP pin. It also includes a dedicated 3.3-V regulator for USB PHY operation - eliminating the need for external transceiver ICs or LDOs in compliant USB device designs. This functionality is confirmed in Chapter 17 of the MC9S08JM60 Series Data Sheet, which explicitly covers the MC9S08JM32CLD.

What low-power modes does the MC9S08JM32CLD support, and which peripherals remain active in Stop3 mode?

The MC9S08JM32CLD supports Wait, Stop2, and Stop3 modes. In Stop3 mode, the real-time counter (RTC), analog comparator (ACMP), and USB module (in suspend state) remain functional while core clocks halt and current drops below 1 µA. This allows wake-up via RTC alarm, ACMP event, or USB resume - critical for battery-operated USB HID or sensor applications. These capabilities are specified in Section 3.6.1 and Table 3-2 of the datasheet.

How much flash memory and RAM does the MC9S08JM32CLD have, and is it protected against unauthorized access?

The MC9S08JM32CLD contains 32 KB of on-chip flash memory and 2 KB of RAM, plus 256 bytes of dedicated USB RAM. Flash protection is implemented via block-level lock bits and optional security byte settings that disable background debug and flash read/write access after programming. These features are documented in Sections 4.5.6 (Flash Block Protection) and 4.6 (Security) of the MC9S08JM60 Series Data Sheet, which applies to the MC9S08JM32CLD.

Is the MC9S08JM32CLD pin-compatible with other members of the JM series, such as the MC9S08JM60CLD?

Yes, the MC9S08JM32CLD is pin-compatible with the MC9S08JM60CLD in the 48-pin QFN package (suffix "CLD"). Both share identical pin assignments, electrical characteristics, and peripheral mapping - differing only in flash/RAM size and associated security register defaults. This allows hardware reuse across memory variants, as confirmed in Appendix B (Ordering Information and Mechanical Drawings) and Section 2.2 (Device Pin Assignment) of the shared datasheet.