NXP Semiconductors MC9S08SH4CPJ

Overview

MC9S08SH4CPJ from Freescale Semiconductor is an 8-bit HCS08 microcontroller with 4 KB flash, 256-byte RAM, and integrated peripherals including 10-bit ADC, analog comparator, SCI, SPI, I²C, TPM timers, and RTC. It operates at up to 20 MHz bus frequency using internal FLL or external crystal, supports stop3 low-power mode, and targets cost-sensitive embedded control in industrial sensors and appliance subsystems.

For engineers reviewing the MC9S08SH4CPJ datasheet, MC9S08SH4CPJ pinout, MC9S08SH4CPJ application, or MC9S08SH4CPJ equivalent, key selection criteria include flash size, QFN-24 package compatibility, real-time interrupt capability in stop mode, internal clock source accuracy (±2% over voltage/temperature), and single-wire background debug support.

Technical Context

The MC9S08SH4CPJ implements the HCS08 CPU core with HC08 instruction set extension (BGND), supporting up to 32 interrupt/reset sources and 40-MHz core operation. Its Internal Clock Source (ICS) module integrates a frequency-locked loop (FLL) with precision-trimmed internal reference enabling 0.2% resolution and ±2% deviation across temperature and supply voltage.

Peripherals include a 12-channel 10-bit ADC with 2.5 µs conversion time and internal temperature sensor, dual 2-channel TPM modules supporting PWM and input capture, and an 8-bit real-time counter (RTC) with free-running 1-kHz low-power oscillator for wake-up in all MCU modes.

Key Specifications

Pinout & Package

MC9S08SH4CPJ is housed in a 24-pin QFN package (98ASA00474D) with 0.5 mm pitch and exposed thermal pad. The package supports copper wire bonding per Freescale QFN migration addendum Rev. 0 (July 2014).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08SH4CPJ, MC9S08SH8CPJ offers double the flash and RAM in identical QFN-24 packaging-ideal for incremental feature upgrades-while S9KEAZ128AMLH delivers significantly higher compute throughput and memory but requires architectural rework and new toolchain investment.

Availability

MC9S08SH4CPJ is available at Aetrix Electronics and suitable for industrial sensor nodes, home appliance subsystems, smart thermostat interfaces, and automotive body control submodules requiring stable component supply and long-lifecycle support.

Supply support for MC9S08SH4CPJ 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

Freescale Semiconductor was a U.S.-based semiconductor company specializing in microcontrollers, analog, and RF solutions before its acquisition by NXP Semiconductors in 2015.

The MC9S08SH4CPJ belongs to the HCS08 SH-series microcontrollers designed for cost-optimized, low-power embedded control in industrial, consumer, and automotive subsystems where small footprint and integrated analog peripherals are critical.

FAQ

What is the maximum bus frequency supported by the MC9S08SH4CPJ?

The MC9S08SH4CPJ supports a maximum bus frequency of 20 MHz, achieved via its Internal Clock Source (ICS) module's frequency-locked loop (FLL) when driven by the factory-trimmed internal reference or an external crystal. This frequency is validated across the full operating temperature range (-40°C to 125°C) and supply voltage (2.7–5.5 V). The MC9S08SH4CPJ achieves this while maintaining ±2% accuracy over voltage and temperature variations.

Does the MC9S08SH4CPJ support debugging without dedicated JTAG pins?

Yes, the MC9S08SH4CPJ features a single-wire background debug (SWB) interface using the BKGD/MS pin, eliminating the need for a full JTAG header. This allows in-circuit programming and real-time debugging-including breakpoint setting and 8-deep FIFO trace-with only one dedicated pin. The MC9S08SH4CPJ debug module supports both tag and force breakpoints and integrates seamlessly with Freescale's CodeWarrior IDE.

Can the MC9S08SH4CPJ operate in ultra-low-power modes with analog peripherals active?

Yes, the MC9S08SH4CPJ supports Stop3 mode-a deep-sleep state where the CPU and most clocks are halted, yet the RTC, analog comparator (ACMP), and ADC (in standby) remain functional. This enables wake-up on timer expiry, comparator threshold crossing, or external interrupt while consuming microamp-level current. The MC9S08SH4CPJ's Stop3 implementation is explicitly documented in its datasheet Rev. 3 (June 2008) and validated for operation down to -40°C.

What package type and pin count does the MC9S08SH4CPJ use?

The MC9S08SH4CPJ uses a 24-pin QFN package (case outline 98ASA00474D) with 0.5 mm pitch and an exposed thermal pad. This package replaced earlier gold-wire variants under Freescale's QFN migration program (document QFN_Addendum Rev. 0, July 2014) and uses copper wire bonding for improved reliability. The MC9S08SH4CPJ shares this mechanical footprint with MC9S08SH8CPJ and MC9S08QB8.

Is there an internal temperature sensor available on the MC9S08SH4CPJ?

Yes, the MC9S08SH4CPJ includes an integrated temperature sensor connected to channel AN12 of its 12-channel 10-bit ADC. The sensor output is calibrated against the internal bandgap reference, enabling direct temperature measurement without external components. Conversion time is 2.5 µs, and readings remain valid in Stop3 mode when the ADC is configured appropriately. This feature is fully specified in the MC9S08SH4CPJ's datasheet Rev. 3 (June 2008), Section 9.1.4.