NXP Semiconductors MC9S08FL16CBM

Overview

MC9S08FL16CBM from NXP Semiconductors (formerly Freescale) is an 8-bit S08 microcontroller with 16 KB flash, 1024-byte RAM, and integrated peripherals including 12-channel 8-bit ADC, dual TPM modules (4+2 channels), SCI, and 30 GPIOs. It operates up to 20 MHz at 4.5–5.5 V across –40 °C to +85 °C and supports low-power stop modes for battery-powered industrial sensors and motor control interfaces.

For engineers reviewing the MC9S08FL16CBM datasheet, MC9S08FL16CBM pinout, MC9S08FL16CBM application, or MC9S08FL16CBM equivalent, key selection criteria include its 32-pin LQFP package, ICS-based clock system with ±2% DCO deviation over voltage/temperature, single-wire background debug interface, and support for LIN-compliant SCI operation in automotive body electronics.

Technical Context

The MC9S08FL16CBM implements the HCS08 CPU core with BGND instruction support and hardware nested interrupt handling via the IPC module. Its clock architecture integrates an internal frequency-locked loop (FLL) with factory-trimmed 31.25 kHz reference, enabling bus frequencies up to 10 MHz while maintaining 0.2% resolution and ±2% total deviation across full operating conditions.

Peripherals are tightly coupled to the bus: the 8-bit ADC features automatic compare, temperature sensor (1.7 mV/°C), and operation in Stop3 mode; TPM modules support input capture, output compare, and edge-/center-aligned PWM; MTIM16 provides 16-bit modulo timing with optional prescaler; and SCI includes LIN extensions and 13-bit break detection.

Key Specifications

Pinout & Package

MC9S08FL16CBM is packaged in a 32-pin LQFP (873A-03) with 0.8 mm pitch, 7 mm × 7 mm body, and exposed thermal pad. Pin functions are multiplexed per Table 1 of the datasheet, with priority-based alternate function assignment.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08AC128CLD and S9KEAZ128AMLH, the MC9S08FL16CBM offers optimal balance of low-power operation, integrated analog (ADC + temp sensor), and compact 32-pin LQFP packaging for space-constrained embedded control - making it preferable for cost-sensitive, battery-operated, or thermally monitored applications where 16 KB flash suffices.

Availability

MC9S08FL16CBM is available at Aetrix Electronics and suitable for automotive body electronics, industrial motor drive interfaces, smart energy meter sensor nodes, and medical infusion pump controllers requiring stable component supply and long-term lifecycle support.

Supply support for MC9S08FL16CBM 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 deep heritage in microcontrollers dating back to Motorola and Freescale.

The MC9S08FL16CBM belongs to the S08FL family designed specifically for cost-sensitive, low-power embedded control in harsh environments - emphasizing robustness, integrated analog, and minimal external component count.

FAQ

What is the maximum operating frequency of the MC9S08FL16CBM CPU core?

The MC9S08FL16CBM CPU core operates up to 20 MHz at 4.5–5.5 V across –40 °C to +85 °C. Its bus frequency is limited to 10 MHz, which governs peripheral timing and interrupt latency. This constraint arises from the internal FLL architecture and ensures reliable operation under worst-case voltage and temperature conditions. The MC9S08FL16CBM achieves this performance without requiring an external crystal in many applications due to its factory-trimmed internal reference.

Does the MC9S08FL16CBM support LIN communication?

Yes, the MC9S08FL16CBM supports LIN communication through its SCI module, which includes LIN-specific extensions such as 13-bit break detection and synchronization field handling. The SCI operates in asynchronous mode and is fully functional across the device's operating voltage range (4.5–5.5 V). When implementing LIN 2.2, the MC9S08FL16CBM requires no external transceiver for basic node functionality if paired with a compliant physical layer driver.

What debug interface does the MC9S08FL16CBM provide?

The MC9S08FL16CBM provides a single-wire background debug (BDC) interface compliant with the Freescale BDM specification. It supports in-circuit debugging with one hardware breakpoint, two additional software breakpoints via the on-chip ICE module, and full register/memory access. Debug communication uses the PTA4/BKGD pin, and entry into BDM mode requires proper assertion of BKGD/MS during reset. The MC9S08FL16CBM does not support JTAG or SWD.

Can the MC9S08FL16CBM operate in ultra-low-power modes with ADC active?

Yes, the MC9S08FL16CBM supports ADC operation in Stop3 mode, drawing only 165 μA total (1.17 μA base + 163.88 μA ADC adder) at 25 °C. This capability enables periodic sensor sampling without waking the CPU, significantly extending battery life in applications like wireless sensor nodes. The ADC retains full functionality - including automatic compare, temperature sensing, and internal reference - while other peripherals remain disabled.

What is the purpose of the PTA5/IRQ/TCLK/RESET pin on the MC9S08FL16CBM?

The PTA5 pin on the MC9S08FL16CBM is input-only and serves four distinct roles: IRQ (external interrupt request), TCLK (external clock source for TPM/MTIM16), RESET (active-low hardware reset), and as part of the background debug entry sequence. Its input-only nature prevents contention during reset assertion or debug initialization. In normal operation, TCLK can be used to synchronize timer modules to an external clock, decoupling them from the internal ICS-generated bus clock.