NXP Semiconductors MC9S08JM32CQH

Overview

MC9S08JM32CQH from NXP Semiconductors (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. It operates at up to 48 MHz CPU frequency and 24 MHz bus speed, targeting embedded control in USB-connected industrial sensors and human-interface devices.

For engineers reviewing the MC9S08JM32CQH datasheet, MC9S08JM32CQH pinout, MC9S08JM32CQH application, or MC9S08JM32CQH equivalent, key selection criteria include USB transceiver integration, 32 KB flash with block protection, 12-bit ADC with temperature sensor, stop3-mode low-power operation, and QFP-64 package compatibility for legacy HCS08-based designs.

Technical Context

The MC9S08JM32CQH implements the HCS08 CPU core with BGND instruction support and a dedicated on-chip background debug module featuring two comparators, nine trigger modes, and an eight-deep FIFO for flow tracing. Its MCG clock system supports FLL and PLL modes with internal reference trimming for stable USB timing.

Peripherals are tightly coupled to the 24 MHz bus: the USB controller includes a dedicated 3.3-V regulator and USBDP pull-up resistor; the 12-channel ADC supports automatic compare and internal temperature sensing; and dual TPM modules provide edge-aligned or centered PWM across 8 total channels with buffered output capability.

Key Specifications

Pinout & Package

MC9S08JM32CQH is housed in a 64-pin QFP (quad flat package) with 0.8 mm lead pitch, 14 × 14 mm body size, and standard JEDEC MO-137AC footprint. Pin functions align with the MC9S08JM60 series pin assignment per Rev. 5 datasheet, Chapter 2.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08JM32CQH, MC9S08JM60CQH offers direct pin-compatible upgrade headroom in flash/RAM, while S9KEAZ128AMLH trades USB integration for ARM ecosystem advantages and higher compute throughput - neither is drop-in, but both serve adjacent design requirements.

Availability

MC9S08JM32CQH is available at Aetrix Electronics and suitable for USB-connected industrial sensors, human-interface devices, and embedded diagnostic peripherals requiring stable component supply and long-term manufacturability.

Supply support for MC9S08JM32CQH 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 embedded MCU heritage.

The MC9S08JM32CQH belongs to the HCS08 JM-series, designed specifically for cost-sensitive, USB-integrated embedded control where analog integration, debug simplicity, and legacy code compatibility are critical.

FAQ

What is the maximum operating frequency of the MC9S08JM32CQH CPU core?

The MC9S08JM32CQH CPU core operates at up to 48 MHz, with a corresponding 24 MHz internal bus frequency. This timing is derived from the MCG clock generator using either FLL or PLL modes, and is validated across the full 2.7–5.5 V supply range per datasheet Rev. 5, Section 1.2 and Appendix A.

Does the MC9S08JM32CQH include an integrated USB physical layer?

Yes, the MC9S08JM32CQH integrates a full USB 2.0 full-speed (12 Mbps) transceiver with on-die termination, differential signaling capability, and a built-in 1.5-kΩ pull-up resistor on USBDP. No external PHY or pull-up resistor is required for basic USB device operation, as confirmed in Section 17.1 of the MC9S08JM60 Series Data Sheet Rev. 5.

How much flash memory does the MC9S08JM32CQH have, and is it protected against unauthorized access?

The MC9S08JM32CQH contains 32 KB of on-chip flash memory with configurable block protection and flash security features. Security is enforced via a flash security byte that disables read-out and programming when set, and protection can be applied to individual flash blocks using the FPROT register - details are specified in Sections 4.5.6 and 4.6 of the datasheet.

Can the MC9S08JM32CQH operate in low-power modes while maintaining USB suspend functionality?

Yes, the MC9S08JM32CQH supports Stop3 mode, which retains USB suspend state and RAM contents while disabling the CPU, flash, and most peripherals. In this mode, the USB module remains responsive to resume signaling, enabling ultra-low-power USB device operation - described in Section 3.6.1 and Table 3-2 of the datasheet.

What development tools are supported for debugging the MC9S08JM32CQH?

The MC9S08JM32CQH is supported by the P&E Micro USB Multilink debugger and CodeWarrior Development Studio for HCS08. Its on-chip background debug module (BDM) provides single-wire interface, hardware breakpoints, and trace FIFO - all documented in Chapter 18 and Section 2.3.4 of the MC9S08JM60 Series Data Sheet Rev. 5.