NXP Semiconductors MC9S08SH32MTG

Overview

MC9S08SH32MTG from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller with 32 KB on-chip FLASH, 2 KB RAM, and a 40-MHz CPU core. It integrates ADC (16-channel, 10-bit), dual TPM PWM modules, SCI/LIN, SPI, I²C, RTC, and analog comparators - designed for cost-sensitive industrial control and automotive body electronics requiring low-power operation and robust debug support.

For engineers reviewing the MC9S08SH32MTG datasheet, MC9S08SH32MTG pinout, MC9S08SH32MTG application, or MC9S08SH32MTG equivalent, key selection criteria include FLASH endurance over voltage/temperature, stop3-mode peripheral retention (ADC, ACMP, RTC), single-wire BDM debug interface, and ICS clock source precision (±0.2% trimmed, ±2% over temp/voltage).

Technical Context

The MC9S08SH32MTG implements the HCS08 CPUV3 core with HC08 instruction set plus BGND, supporting up to 32 interrupt/reset sources. Its internal clock source (ICS) uses a frequency-locked loop (FLL) with trimmable internal reference, enabling bus frequencies from 2 MHz to 20 MHz without external crystal.

Peripherals operate in multiple low-power modes: ADC and ACMP retain functionality in stop3 mode; RTC runs continuously on 1-kHz internal oscillator; SCI supports LIN master break generation and wake-up on active edge. Security circuitry prevents unauthorized access to FLASH and RAM contents.

Key Specifications

Pinout & Package

MC9S08SH32MTG is housed in a 28-pin TSSOP package (JEDEC MO-153, 7.8 mm × 4.4 mm, 0.65 mm pitch) with 23 GPIOs, 1 output-only pin, 8 interrupt-capable inputs, and dedicated pins for XOSC, RESET, BKGD/MS, VDD/VSS, and analog references.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S9S08SG32E1MTJ and MC9S08AC32CFUE, the MC9S08SH32MTG uniquely balances LIN-compliant communication, stop3-mode analog peripheral retention, and compact 28-TSSOP packaging - making it optimal for cost-sensitive, low-power body electronics where CAN is unnecessary but precise timing and sensor integration are critical.

Availability

MC9S08SH32MTG is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, smart appliance subsystems, and portable medical diagnostics requiring stable component supply and long-term lifecycle support.

Supply support for MC9S08SH32MTG 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, formed from the acquisition of Freescale Semiconductor in 2015.

The MC9S08SH32MTG belongs to the legacy HCS08 microcontroller family, designed specifically for cost-optimized, low-power embedded control in automotive body electronics and industrial automation where deterministic timing, LIN compliance, and robust debug are essential.

FAQ

What is the maximum operating frequency of the MC9S08SH32MTG CPU core?

The MC9S08SH32MTG features an HCS08 CPUV3 core rated for up to 40 MHz operation. This maximum frequency is achievable when using the internal clock source (ICS) with FLL enabled and appropriate bus prescaling. The actual bus frequency ranges from 2 MHz to 20 MHz depending on ICS configuration and system requirements - all within guaranteed electrical specifications per the Rev. 3 datasheet.

Does the MC9S08SH32MTG support LIN communication natively?

Yes, the MC9S08SH32MTG's SCI module supports LIN 2.x physical layer functions natively: it can generate extended-break frames (≥13 dominant bits) as a LIN master and detect them as a LIN slave without external transceiver hardware. This capability is confirmed in Section 14.1.1 of the Rev. 3 datasheet and requires only proper software configuration of the SCI baud rate and break detection registers.

Can the MC9S08SH32MTG retain ADC functionality during low-power modes?

Yes, the MC9S08SH32MTG maintains full ADC operation - including conversions, automatic compare, and temperature sensor readings - in stop3 mode. This is explicitly documented in Sections 9.4.7 and 3.6.1 of the Rev. 3 datasheet. The ADC continues sampling using the internal 1-kHz RTC oscillator or other configured clocks, enabling battery-monitoring applications with minimal current draw.

What debug interface does the MC9S08SH32MTG provide?

The MC9S08SH32MTG implements a single-wire background debug mode (BDM) interface compliant with Freescale/NXP BDM specification v3.0. It supports breakpoint setting, memory inspection, register read/write, and flash programming via the BKGD/MS pin. An on-chip ICE module with two comparators, nine trigger modes, and an 8-deep FIFO enables advanced in-circuit emulation - all detailed in Chapter 17 of the Rev. 3 datasheet.

Is the MC9S08SH32MTG pin-compatible with other HCS08 devices in the SH-series?

No, the MC9S08SH32MTG is not universally pin-compatible across the SH-series. While it shares the 28-TSSOP package with MC9S08SH16MTG, differences in peripheral mapping (e.g., TPM channel assignments, ADC channel routing) and pin functions (e.g., PTA7 usage) require verification against individual device datasheets. Pin compatibility must be confirmed per specific variant - the Rev. 3 datasheet covers both MC9S08SH32 and MC9S08SH16 but notes functional variations in Chapter 2.