Freescale Semiconductor MC68HC908MR32, MC68HC908MR16 specification

Development Support

Table 18-6. IWRITE (Indexed Write) Command

Description	Write to last address accessed + 1

Operand	Single data byte

Data Returned	None

Opcode	$19

Command Sequence

FROM HOST

DATA

IWRITE

ECHO

A sequence of IREAD or IWRITE commands can access a block of memory sequentially over the full 64-Kbyte memory map.

Table 18-7. READSP (Read Stack Pointer) Command

Description	Reads stack pointer

Operand	None

Data Returned	Returns incremented stack pointer value (SP + 1) in high-byte:low-byte order

Opcode	$0C

Command Sequence

FROM HOST
		READSP	SP	SP


	READSP
	READSP		HIGH	LOW
			HIGH	LOW

ECHO

RETURN

Table 18-8. RUN (Run User Program) Command

Description	Executes PULH and RTI instructions

Operand	None

Data Returned	None

Opcode	$28

			Command Sequence
		FROM HOST


			RUN	RUN

	ECHO

MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1

262	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 Iwrite Indexed Write Command, RUN Run User Program Command

Models: MC68HC908MR16 MC68HC908MR32

Development Support

Table 18-6. IWRITE (Indexed Write) Command

Command Sequence

Table 18-7. READSP (Read Stack Pointer) Command

Command Sequence

Table 18-8. RUN (Run User Program) Command

Command Sequence

MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1

Freescale Semiconductor

MC68HC908MR16, MC68HC908MR32 specifications