NXP Semiconductors MC9S08SH32CWL

Overview

MC9S08SH32CWL from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller featuring a 40-MHz CPU, 32 KB on-chip FLASH, 2 KB RAM, and integrated peripherals including 10-bit ADC, dual TPM PWM modules, SCI, SPI, I²C, ACMP, RTC, and single-wire BDM debug interface. It targets low-power industrial control, sensor interfaces, and appliance motor control where deterministic real-time response and stop-mode operation are required.

For engineers reviewing the MC9S08SH32CWL datasheet, MC9S08SH32CWL pinout, MC9S08SH32CWL application, or MC9S08SH32CWL equivalent, key selection criteria include its 28-pin TSSOP package, 32 KB FLASH with block protection, 2 MHz–20 MHz bus frequency via ICS FLL, stop3 mode current of 1.5 µA, and support for LIN-compliant SCI wake-up and temperature-sensing ADC.

Technical Context

The MC9S08SH32CWL implements the HCS08 CPU core with HC08 instruction set extension (BGND), supporting up to 32 interrupt/reset sources and nested interrupt handling. Its internal clock source (ICS) uses a frequency-locked loop (FLL) with precision-trimmed internal reference (±0.2% resolution, ±2% deviation over voltage/temperature), enabling stable bus frequencies from 2 MHz to 20 MHz without external crystal.

Peripherals operate across power modes: ADC and ACMP remain functional in stop3 mode; RTC runs continuously on 1-kHz internal oscillator; SCI supports LIN master break generation and slave break detection with wake-up capability; TPM modules deliver edge- or center-aligned PWM with input capture and output compare on four total channels.

Key Specifications

Pinout & Package

MC9S08SH32CWL is housed in a 28-pin Thin Shrink Small Outline Package (TSSOP) with 0.65 mm pitch, JEDEC MO-153 compliant, thermal pad optional. Pin functions align with MC9S08SH32 series standard assignment for 28-TSSOP.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08SH16CWL, the MC9S08SH32CWL provides double FLASH/RAM for larger control algorithms and data logging; versus S9S08SG48E1MTJ, it trades memory and speed for lower cost and smaller footprint in fixed-function applications.

Availability

MC9S08SH32CWL is available at Aetrix Electronics and suitable for industrial sensor nodes, appliance motor controllers, automotive body modules, and smart power outlets requiring stable component supply and long-term lifecycle support.

Supply support for MC9S08SH32CWL 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 company formed from the spin-off of Philips' semiconductor division, now specializing in secure connectivity solutions for automotive, industrial, and IoT markets.

The MC9S08SH32CWL belongs to NXP's legacy HCS08 microcontroller family, designed for cost-sensitive, low-power embedded control applications demanding high reliability, integrated analog peripherals, and robust debug infrastructure.

FAQ

What is the maximum bus frequency supported by the MC9S08SH32CWL?

The MC9S08SH32CWL supports a maximum bus frequency of 20 MHz, achieved using the internal clock source (ICS) with its frequency-locked loop (FLL). This frequency is maintained across the full operating voltage (2.7–5.5 V) and temperature range (–40°C to +105°C) when the internal reference is trimmed per datasheet procedure. The MC9S08SH32CWL does not support external clock sources above 20 MHz for bus operation.

Does the MC9S08SH32CWL include hardware support for LIN communication?

Yes, the MC9S08SH32CWL includes dedicated LIN functionality within its SCI module: it supports LIN master extended break generation and LIN slave extended break detection, both implemented in hardware. This allows the MC9S08SH32CWL to serve as either a LIN master or slave node without software bit-banging, and supports wake-up on active edge - a key requirement for automotive body electronics compliance.

Can the MC9S08SH32CWL operate in ultra-low-power modes with the ADC active?

Yes, the MC9S08SH32CWL supports ADC operation in stop3 mode. Its 10-bit ADC remains fully functional during stop3, enabling periodic wake-up sampling without exiting low-power state. Conversion time is 2.5 µs, and the module includes automatic compare and temperature sensor channel - making the MC9S08SH32CWL suitable for battery-powered sensor applications requiring infrequent but precise analog measurements.

What debug interface does the MC9S08SH32CWL use, and how many pins are required?

The MC9S08SH32CWL uses a single-wire background debug mode (BDM) interface accessed via the BKGD/MS pin. Only one dedicated pin is required - no additional clock, data, or reset lines are needed. This interface supports full in-circuit emulation, breakpoint setting (one hardware breakpoint plus two more in debug module), and memory inspection, making the MC9S08SH32CWL ideal for space-constrained PCBs where JTAG headers are impractical.

Is the MC9S08SH32CWL pin-compatible with other members of the HCS08 SH-series?

Yes, the MC9S08SH32CWL in the 28-TSSOP package (CWL suffix) shares identical pinout with MC9S08SH16CWL and MC9S08SH8CWL. All three devices have the same 28-pin mapping, register layout, and peripheral enablement - enabling hardware reuse across memory variants. Firmware compiled for MC9S08SH32CWL will run unmodified on MC9S08SH16CWL, though FLASH usage must remain within 16 KB.