NXP Semiconductors M68ICS08RK2

Overview

M68ICS08RK2 from Motorola is a dedicated in-circuit simulator (ICS) board for the MC68HC908RK2 8-bit microcontroller, enabling real-time code simulation, FLASH programming, and limited in-circuit emulation via MON08 interface. It operates at selectable bus frequencies (2.4576 MHz or 4.9152 MHz), supports 2.0–3.3 V target voltage level shifting, and interfaces via RS-232 to Windows 95+ host PCs.

For engineers reviewing the M68ICS08RK2 datasheet, M68ICS08RK2 pinout, M68ICS08RK2 application, or M68ICS08RK2 equivalent, this page delivers verified hardware specifications, jumper-configurable operation modes, MON08 debug interface details, and targeted development use cases for MC68HC908RK2-based embedded systems.

Technical Context

The M68ICS08RK2 implements a dedicated hardware platform centered on the MC68HC908RK2 MCU, with configurable jumpers (W1–W5) for power sourcing, bus frequency, reset direction, and clock source selection. Its MON08 interface enables bidirectional communication using RST, IRQ, PB0, PB2, PB3, and PA0 pins - though PA0 is reserved for MON08 and unavailable for user I/O during debugging.

It provides dual-target connectivity: a 20-pin DIP socket (J3) for ribbon-cable connection and a 20-pin flex-cable header (J1) for SOIC/SSOP/QFP targets. Level-shifting circuitry (J4) allows safe interfacing across 2.0–3.3 V logic domains, while onboard +5 V regulation powers both board and optionally the target system.

Key Specifications

Availability

M68ICS08RK2 is available at Aetrix Electronics and suitable for embedded MCU development, firmware validation, and production-ready FLASH programming requiring stable component supply, legacy toolchain compatibility, and direct MON08-based debug access.

Supply support for M68ICS08RK2 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

Motorola (now part of NXP Semiconductors) was a pioneering semiconductor manufacturer known for 8-bit HC08 architecture and embedded development tools.

The M68ICS08RK2 belongs to Motorola's RKICS family - purpose-built to accelerate development of MC68HC908RK2-based systems through integrated simulation, programming, and MON08 real-time debugging capabilities.

FAQ

What is the primary function of the M68ICS08RK2?

The M68ICS08RK2 is a dedicated in-circuit simulator board designed exclusively for the MC68HC908RK2 microcontroller. It enables source-level code simulation, FLASH memory programming, and limited real-time emulation via the MON08 debug interface. The M68ICS08RK2 integrates hardware, jumper-configurable settings, and bundled P&E Microcomputer Systems software (ICS08RKZ, PROG08SZ) to form a complete development environment for this specific MCU family.

Which microcontrollers does the M68ICS08RK2 support?

The M68ICS08RK2 supports only the MC68HC908RK2 microcontroller - confirmed by its socket layout (XU1–XU3 for 20-pin SSOP/SOIC and 32-pin QFP), documentation scope, and functional design. It does not support other HC08 variants like MC68HC908GP32 or unrelated families. The board's MON08 interface, bus timing, and voltage translation are all calibrated specifically for the MC68HC908RK2's electrical and protocol requirements.

How does the M68ICS08RK2 connect to a host PC and target system?

The M68ICS08RK2 connects to a host PC via an RS-232 DB-9 serial port (P2 connector) using a standard null-modem cable. It connects to the target system via three options: a 20-pin ribbon cable to J3 (DIP socket), a flex cable to J1 (20-pin header for SOIC/SSOP/QFP), or the MON08 interface via J2 (8-pin header). The MON08 path uses RST, IRQ, PB0, PB2, PB3, and PA0 signals - with PA0 dedicated to debug and unavailable for general-purpose I/O during active sessions.

What are the key configurable jumpers on the M68ICS08RK2 board?

The M68ICS08RK2 features five critical jumper headers: W1 selects target power source (board vs. external); W2 sets MCU bus frequency (2.4576 MHz or 4.9152 MHz) and corresponding MON08 baud rate; W3 configures reset signal direction (MCU→target or target→MCU); W4/W5 select clock source (onboard oscillator Y1, target OSC1, or external clock). These jumpers define operational mode, voltage domain isolation, timing behavior, and debug topology - all documented in Table 2-1 and Sections 2.3.2.x of the User's Manual.

Is the M68ICS08RK2 compatible with modern Windows operating systems?

The M68ICS08RK2 was validated for Windows 95 and later versions per its original specification, but native driver and software compatibility with Windows 10/11 is not guaranteed. The bundled ICS08RK software (WINIDE, PROG08SZ, etc.) is 16-/32-bit Windows executable and may require compatibility mode, virtual machine, or legacy hardware. RS-232 connectivity remains functional with USB-to-serial adapters, but full toolchain reliability depends on third-party P&E Micro support updates - not inherent to the M68ICS08RK2 hardware itself.