Wait Mode, Stop Mode | Freescale Semiconductor MC68HC908MR32

Memory

START ADDRESS OF FLASH BLOCK PROTECT

16-BIT MEMORY ADDRESS

														0		0		0	0		0		0		0
				FLBPR VALUE										0		0		0	0		0		0		0

Figure 2-6. FLASH Block Protect Start Address

Refer to Table 2-2for examples of the protect start address.

Table 2-2. Examples of Protect Start Address

BPR[7:0]		Start of Address of Protect Range

$00		The entire FLASH memory is protected.

$01 (0000	0001)	$8080 (1000 0000 1000 0000)

$02 (0000	0010)	$8100 (1000 0001 0000 0000)

		and so on...

$FE (1111	1110)	$FF00 (1111 1111 0000 0000)

$FF		The entire FLASH memory is not protected.

Note: The end address of the protected range is always $FFFF.

2.8.7 Wait Mode

Putting the MCU into wait mode while the FLASH is in read mode does not affect the operation of the FLASH memory directly, but there will not be any memory activity since the CPU is inactive.

The WAIT instruction should not be executed while performing a program or erase operation on the FLASH. Otherwise, the operation will discontinue, and the FLASH will be on standby mode.

2.8.8 Stop Mode

Putting the MCU into stop mode while the FLASH is in read mode does not affect the operation of the FLASH memory directly, but there will not be any memory activity since the CPU is inactive.

The STOP instruction should not be executed while performing a program or erase operation on the FLASH, otherwise the operation will discontinue, and the FLASH will be on standby mode

NOTE

Standby mode is the power-saving mode of the FLASH module in which all internal control signals to the FLASH are inactive and the current consumption of the FLASH is at a minimum.

MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1

44	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 Wait Mode, Stop Mode, Examples of Protect Start Address

Models: MC68HC908MR16 MC68HC908MR32