NXP Semiconductors MC9S08SH32CTLR

Overview

MC9S08SH32CTLR from NXP (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 timers, SCI/LIN, SPI, I²C, RTC, and analog comparators - designed for cost-sensitive industrial control and automotive body electronics.

For engineers reviewing the MC9S08SH32CTLR datasheet, MC9S08SH32CTLR pinout, MC9S08SH32CTLR application, or MC9S08SH32CTLR equivalent, key selection criteria include its 28-TSSOP package, stop3-mode operation with ADC/ACMP active, 1.8–3.6 V supply range, and single-wire background debug interface for in-circuit development.

Technical Context

The MC9S08SH32CTLR implements the HCS08 CPU 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 (±0.2% resolution, ±2% deviation over voltage/temperature), enabling bus frequencies from 2 MHz to 20 MHz.

Peripherals operate across power modes: ADC and ACMP remain functional in stop3 mode; RTC runs continuously using a free-running 1-kHz on-chip oscillator; SCI supports LIN master break generation and slave break detection; I²C operates at up to 100 kbps with multi-master and 10-bit addressing support.

Key Specifications

Pinout & Package

MC9S08SH32CTLR is housed in a 28-pin Thin Shrink Small Outline Package (TSSOP), compliant with JEDEC MO-153AA, with 0.65 mm lead pitch and exposed thermal pad (non-electrical). Pin functions are validated per MC9S08SH32 Rev. 3 datasheet Section 2.1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with S9S08SG32E1MTJR and MC9RS08LA8CP, the MC9S08SH32CTLR delivers higher integration (LIN+ACMP+TPM+RTC), larger memory, and broader peripheral support - making it suitable for feature-rich embedded control where system-level functionality outweighs minimal BOM cost savings.

Availability

MC9S08SH32CTLR is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, smart appliance subsystems, and portable medical handsets requiring stable component supply and long-term manufacturability.

Supply support for MC9S08SH32CTLR 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 MC9S08SH32CTLR 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 real-time response and peripheral integration are critical.

FAQ

What is the maximum operating frequency of the MC9S08SH32CTLR CPU core?

The MC9S08SH32CTLR features an HCS08 CPU core rated for up to 40 MHz operation. This maximum frequency is achievable when the internal clock source (ICS) is configured to deliver a 20 MHz bus clock with a 2× prescaler, or directly from an external crystal oscillator within specification. The actual sustained frequency depends on supply voltage (1.8–3.6 V) and temperature range (–40°C to +105°C), as defined in the electrical characteristics table of the MC9S08SH32 Rev. 3 datasheet.

Does the MC9S08SH32CTLR support LIN communication natively?

Yes, the MC9S08SH32CTLR supports LIN 2.x communication natively through its SCI module, which includes hardware-assisted LIN master break generation and LIN slave extended break detection. This eliminates the need for external LIN transceivers in basic implementations and allows direct connection to LIN bus lines with appropriate level-shifting and protection circuitry. The MC9S08SH32CTLR's SCI meets ISO 17987-4 physical layer timing requirements when used with a compliant transceiver.

Can the MC9S08SH32CTLR operate in ultra-low-power modes while retaining analog functionality?

Yes, the MC9S08SH32CTLR supports stop3 mode, in which the ADC, analog comparators (ACMP), and real-time counter (RTC) remain fully operational while the CPU and most peripherals are halted. In this mode, current consumption drops to less than 1 μA (typical), enabling battery-powered wake-on-event applications such as sensor polling or threshold-triggered alerts - all without external timing or analog components.

What debug interface does the MC9S08SH32CTLR use, and what hardware is required?

The MC9S08SH32CTLR uses a single-wire background debug (BDM) interface via the BKGD/MS pin. Debugging and programming require a compatible BDM pod (e.g., P&E Micro USB-ML-12 or SEGGER J-Link with BDM firmware) and standard 6-pin BDM header. No JTAG interface is present. The MC9S08SH32CTLR supports breakpoint setting, memory inspection, and flash programming in-circuit without removing the device from the target board.

Is the MC9S08SH32CTLR pin-compatible with other members of the SH-series, such as MC9S08SH16?

No, the MC9S08SH32CTLR is not pin-compatible with MC9S08SH16 despite sharing the same 28-TSSOP package option. Differences in peripheral mapping - particularly for TPM channels, ADC inputs, and I/O alternate functions - result in non-interchangeable pin assignments. Board layout must be verified against the specific device's pinout diagram in the MC9S08SH32 Rev. 3 datasheet, Section 2.1, before substitution.