NXP Semiconductors MC9S08SH16CWLR

Overview

MC9S08SH16CWLR from NXP Semiconductors (formerly Freescale) is an 8-bit HCS08 microcontroller with 16 KB on-chip FLASH, 1 KB RAM, and a 40-MHz CPU core. It integrates ADC (10-bit, 16-channel), dual TPM PWM modules, SCI, SPI, I²C, RTC, and analog comparators - designed for cost-sensitive embedded control in industrial sensors and motor drive subsystems.

For engineers reviewing the MC9S08SH16CWLR datasheet, MC9S08SH16CWLR pinout, MC9S08SH16CWLR application, or MC9S08SH16CWLR equivalent, key selection criteria include FLASH size, stop3-mode peripheral operation, ICS clock trimming accuracy (±2% over voltage/temperature), and TSSOP-28 package compatibility with legacy SH-series layouts.

Technical Context

The MC9S08SH16CWLR implements the S08CPUV3 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 precision-trimmed internal reference enabling ±0.2% resolution and ±2% deviation across operating voltage and temperature.

Peripherals operate in low-power modes: ADC, ACMP, RTC, and SCI retain functionality in stop3 mode. The MCU supports LIN-compliant SCI with extended break generation/detection and includes a single-wire background debug interface with three breakpoint registers and on-chip ICE debug module featuring eight-deep FIFO and nine trigger modes.

Key Specifications

Pinout & Package

MC9S08SH16CWLR is housed in a 28-pin Thin Shrink Small Outline Package (TSSOP) compliant with JEDEC MO-153. Pin assignments match the MC9S08SH32 series footprint, enabling layout reuse across SH-family variants.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08SH32CWLR, the MC9S08SH16CWLR trades FLASH capacity for lower unit cost and smaller code footprint, while retaining identical peripheral functionality and low-power behavior; versus S9S08SG48E1MTJR, it offers proven SH-series reliability and drop-in compatibility but lacks I²C speed upgrades and newer qualification standards.

Availability

MC9S08SH16CWLR is available at Aetrix Electronics and suitable for industrial sensor nodes, BLDC motor controllers, smart lighting ballasts, and home appliance control panels requiring stable component supply and long-term manufacturability.

Supply support for MC9S08SH16CWLR 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 HCS08 family - including MC9S08SH16CWLR - was engineered for deterministic real-time control in resource-constrained environments, emphasizing low-power operation, integrated analog peripherals, and robust debug infrastructure for rapid embedded development.

FAQ

What is the maximum bus frequency supported by the MC9S08SH16CWLR?

The MC9S08SH16CWLR supports a maximum bus frequency of 20 MHz when using the Internal Clock Source (ICS) with FLL enabled. Its HCS08 CPU core is rated for up to 40 MHz operation, but actual bus speed depends on clock configuration - external crystal up to 16 MHz or ICS-derived clocks from 2 MHz to 20 MHz. This allows flexible trade-offs between performance and power consumption in real-time control tasks.

Does the MC9S08SH16CWLR support analog-to-digital conversion in low-power modes?

Yes, the MC9S08SH16CWLR ADC operates in stop3 mode, enabling energy-efficient periodic sampling without waking the CPU. It features 16 channels, 10-bit resolution, 2.5 μs conversion time, automatic compare function, and an integrated temperature sensor with internal bandgap reference - all functional while drawing only ~2 μA total system current. This makes MC9S08SH16CWLR ideal for battery-powered sensor applications.

What debug interface does the MC9S08SH16CWLR provide?

The MC9S08SH16CWLR includes a single-wire background debug (BDM) interface compliant with standard HCS08 debug protocols. It supports in-circuit debugging with three breakpoint registers (one user-settable, two in on-chip debug module), on-chip ICE with eight-deep FIFO for flow tracing, and nine trigger modes including tag and force breakpoints. No external JTAG adapter is required - only a BDM pod or compatible debugger such as P&E Multilink.

Is the MC9S08SH16CWLR pin-compatible with other devices in the SH-series?

Yes, the MC9S08SH16CWLR in TSSOP-28 package shares identical pinout with MC9S08SH32CWLR and MC9S08SH8CWLR. All SH-series variants use the same 28-pin assignment for power, I/O, peripherals, and debug signals - allowing hardware reuse across FLASH size variants. This simplifies design scalability and inventory management for manufacturers deploying multiple firmware configurations on one PCB.

What clock sources are available on the MC9S08SH16CWLR?

The MC9S08SH16CWLR provides three clock source options: (1) External crystal/ceramic resonator via XTAL/EXTAL pins (31.25 kHz–38.4 kHz or 1–16 MHz), (2) Internal Clock Source (ICS) with FLL and precision-trimmed reference (±2% deviation over voltage/temperature), and (3) Dedicated 1-kHz internal COP/RTC oscillator. The ICS supports bus frequencies from 2 MHz to 20 MHz and enables crystal-free operation in cost-sensitive designs.