Revision History

The following revision history table summarizes changes contained in this document. For your convenience, the page number designators have been linked to the appropriate location.

Revision History

Date	Revision		Description	Page
Date	Level		Description	Number(s)
	Level			Number(s)

		Figure 2-1. MC68HC908MR32 Memory Map — Added FLASH Block Protect		29
August,		Register (FLBPR) at address location $FF7E		29
August,	3.0	Register (FLBPR) at address location $FF7E
2001	3.0	Figure A-1. MC68HC908MR16 Memory Map — Added FLASH Block Protect		306
2001
		Register (FLBPR) at address location $FF7E
		Register (FLBPR) at address location $FF7E

October,	4.0	3.3.3 Conversion Time — Reworked equations and text for clarity.		50
2001	4.0			50
2001

		Figure 18-8. Monitor Mode Circuit — PTA7 and connecting circuitry added		279

		Table 18-2. Monitor Mode Signal Requirements and Options — Switch locations		281
		added to column headings for clarity		281
December,		added to column headings for clarity
	5.0
		Section 16. Timer Interface A (TIMA) — Timer discrepancies corrected throughout
2001				233
2001		this section.		233
		this section.

		Section 17. Timer Interface B (TIMB) — Timer discrepancies corrected throughout		255
		this section.		255
		this section.

		Reformatted to meet current publication standards		Throughout

		2.8.2 FLASH Page Erase Operation — Procedure reworked for clarity		42

		2.8.3 FLASH Mass Erase Operation — Procedure reworked for clarity		42
November,
November,	6.0	2.8.4 FLASH Program Operation — Procedure reworked for clarity		43
2003
		Figure 14-14. SIM Break Status Register (SBSR) — Clarified definition of SBSW bit.		207



		19.5 DC Electrical Characteristics — Corrected maximum value for monitor mode		291

		entry voltage (on IRQ)
		entry voltage (on IRQ)

		19.6 FLASH Memory Characteristics — Updated table entries		292

July,	6.1	Updated to meet Freescale identity guidelines.		Throughout
2005	6.1	Updated to meet Freescale identity guidelines.		Throughout
2005

MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1

4	Freescale Semiconductor

MC68HC908MR16, MC68HC908MR32 specifications

Freescale Semiconductor's MC68HC908MR32 and MC68HC908MR16 microcontrollers are part of the popular HC08 family, designed primarily for embedded applications. These microcontrollers are particularly favored in automotive, industrial, and consumer product sectors due to their reliability and versatility.

One of the standout features of the MC68HC908MR series is its CMOS technology, which enhances performance while minimizing power consumption. This makes these microcontrollers suitable for battery-operated devices. They operate at a maximum clock frequency of 2 MHz and offer a 16-bit architecture, providing a solid balance between processing power and efficiency.

The MC68HC908MR32 variant is equipped with 32KB of flash memory, which allows for the storage of complex programs and extensive data handling. In contrast, the MC68HC908MR16 features 16KB of flash memory, making it ideal for simpler applications. Both microcontrollers also come with 1KB of RAM, enabling efficient data processing and real-time operations.

Another significant characteristic of these microcontrollers is their integrated peripherals. They come with multiple input/output (I/O) pins, which allow for connectivity with various sensors and actuators. The built-in timer systems offer precise timing control for automotive and industrial applications, while the Analog-to-Digital Converter (ADC) provides essential conversion capabilities for various analog signals.

For communication purposes, the MC68HC908MR series includes a serial communication interface, enabling easy integration with other devices and systems. This versatility facilitates the development of complex systems that require interaction with external components.

Security is another crucial aspect of these microcontrollers. They have built-in fail-safe mechanisms to ensure reliable operation under various conditions, making them suitable for critical systems. Additionally, their robust architecture helps to safeguard against potential disruptions or attacks.

In summary, Freescale Semiconductor's MC68HC908MR32 and MC68HC908MR16 microcontrollers are key players in the embedded systems landscape. Their blend of power efficiency, integrated features, and scalability ensures they remain relevant for a wide array of applications, making them a favored choice among engineers and developers looking for dependable solutions in a competitive market.

Freescale Semiconductor MC68HC908MR32 Revision History, Date Revision Description Level Numbers

Models: MC68HC908MR16 MC68HC908MR32

Revision History

Revision History

Date

Revision

Description

Level

Number(s)

Figure 2-1. MC68HC908MR32 Memory Map — Added FLASH Block Protect

Figure A-1. MC68HC908MR16 Memory Map — Added FLASH Block Protect

Figure 18-8. Monitor Mode Circuit — PTA7 and connecting circuitry added

Figure 14-14. SIM Break Status Register (SBSR) — Clarified definition of SBSW bit.

207

MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1

MC68HC908MR16, MC68HC908MR32 specifications