NXP Semiconductors MC9S08PA16AVWJR

Overview

MC9S08PA16AVWJR from NXP Semiconductors is an 8-bit S08 core microcontroller with 16 KB flash, 2 KB RAM, and 256 B EEPROM, operating at up to 20 MHz across –40 °C to +105 °C. It integrates dual FTM modules (6-channel + 2-channel), 12-bit 12-channel ADC, I²C, two SCI/LIN UARTs, SPI, RTC, and analog comparator - deployed in automotive body control modules, industrial sensor nodes, and smart appliance controllers.

For engineers reviewing the MC9S08PA16AVWJR datasheet, MC9S08PA16AVWJR pinout, MC9S08PA16AVWJR application, or MC9S08PA16AVWJR equivalent, key selection criteria include its 20-pin SOIC package, V-grade temperature range (–40 °C to +105 °C), 20 mA high-drive GPIO capability, single-wire BDM debug interface, and support for stop3 low-power mode with ADC and LVD active.

Technical Context

The MC9S08PA16AVWJR implements an enhanced S08 CPU with four-level nested interrupt handling and up to 40 interrupt/reset sources. Its clock system combines a 4–20 MHz external crystal oscillator (XOSC) and an internal clock source (ICS) with FLL-based frequency multiplication and factory-trimmed reference enabling ±1% accuracy from 0 °C to 70 °C.

System protection includes independent watchdog with dedicated 1 kHz LPO clock, programmable low-voltage detect/warning with four threshold levels, illegal opcode/address detection, and flash/RAM access protection. Peripheral clock gating via SIM allows selective module disablement to reduce current in wait/stop modes.

Key Specifications

Pinout & Package

MC9S08PA16AVWJR is housed in a 20-pin SOIC package (CC = WJ per part number format), with 18 usable GPIOs, 2 power pins (VDD/VSS), and dedicated debug (BKGD) and reset (RESET) terminals. Pin assignments follow multiplexed signal mapping per the MCU block diagram and Table 9.2 of Rev. 4 datasheet.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MC9S08PA16AVWJR, the S9KEAZ128AMLH delivers ARM-based scalability at the cost of migration effort, while the MC9S08AC128CPUE extends the S08 family with greater resources but demands physical redesign - neither offers drop-in replacement capability.

Availability

MC9S08PA16AVWJR is available at Aetrix Electronics and suitable for automotive body electronics, industrial sensor nodes, smart appliance interfaces, and home energy monitors requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for MC9S08PA16AVWJR 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 specializing in secure connectivity solutions for automotive, industrial, IoT, and mobile applications.

The MC9S08PA16 series belongs to NXP's legacy S08 8-bit MCU portfolio, designed specifically for cost-sensitive, reliability-critical embedded control in harsh environments - emphasizing low power, integrated analog, and robust debug support.

FAQ

What is the maximum operating frequency and voltage range for the MC9S08PA16AVWJR?

The MC9S08PA16AVWJR operates at up to 20 MHz bus frequency across a supply voltage range of 2.7 V to 5.5 V, fully specified over the industrial temperature range of –40 °C to +105 °C. Its internal clock source (ICS) with FLL achieves ±1% accuracy from 0 °C to 70 °C and ±2% across the full operating range, enabling reliable timing without external crystals in many applications.

Does the MC9S08PA16AVWJR support low-power modes with peripheral activity?

Yes, the MC9S08PA16AVWJR supports Stop3 mode where the CPU and most clocks halt while retaining RAM contents and enabling selected peripherals. In this mode, the 12-bit ADC, low-voltage detector (LVD), and real-time counter (RTC) remain functional - with typical current draw of 1.35 µA at 5 V, plus adders of 40 µA (ADC active) and 128 µA (LVD active).

How many high-drive GPIO pins does the MC9S08PA16AVWJR have, and what is their current rating?

The MC9S08PA16AVWJR features four ultra-high-current GPIO pins - PTB4, PTB5, PTD0, and PTD1 - each capable of sourcing or sinking up to 20 mA. These pins are explicitly characterized for this drive strength in the datasheet's DC characteristics table and support direct interfacing with LEDs, small relays, and discrete transistors without external drivers.

What debug interface does the MC9S08PA16AVWJR provide, and is it compatible with standard tools?

The MC9S08PA16AVWJR includes a single-wire background debug mode (BDM) interface on the PTA4/BKGD pin, supporting in-circuit debugging with breakpoint setting, memory inspection, and register access. It is fully compatible with NXP's CodeWarrior Development Studio and third-party BDM probes such as the PE Micro Multilink, requiring no additional hardware beyond the BKGD and RESET connections.

Is the MC9S08PA16AVWJR pin-compatible with other members of the PA-series, such as the MC9S08PA8?

No, the MC9S08PA16AVWJR is not pin-compatible with MC9S08PA8 variants in the same package - although both share the 20-pin SOIC option, the PA8 devices (e.g., MC9S08PA8AVWJR) implement reduced peripheral sets (e.g., 10-channel ADC, single FTM) and fewer GPIOs (18 vs. 37 total), resulting in different pin multiplexing and functional allocation per the datasheet's pin assignment tables.