Memory

ALGORITHM FOR PROGRAMMING

1

A ROW (64 BYTES) OF FLASH MEMORY

2

3

4

5

6

SET PGM BIT

READ THE FLASH BLOCK PROTECT REGISTER

WRITE ANY DATA TO ANY FLASH ADDRESS WITHIN THE ROW ADDRESS RANGE DESIRED

WAIT FOR A TIME, tNVS

SET HVEN BIT

WAIT FOR A TIME, tPGS

7

8

WRITE DATA TO THE FLASH ADDRESS

TO BE PROGRAMMED

WAIT FOR A TIME, tPROG

 

COMPLETED

 

 

PROGRAMMING

 

THIS ROW?

 

 

 

NO

10

 

 

 

 

 

 

 

 

 

 

 

 

 

11

Note:

 

The time between each FLASH address change (step 7 to step 7), or

12

the time between the last FLASH address programmed

 

to clearing PGM bit (step 7 to step 10)

 

must not exceed the maximum programming

13

time, tPROG max.

 

This row program algorithm assumes the row/s to be programmed are initially erased.

YES

CLEAR PGM BIT

WAIT FOR A TIME, tNVH

CLEAR HVEN BIT

WAIT FOR A TIME, tRCV

END OF PROGRAMMING

Figure 2-4. FLASH Programming Flowchart

MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1

42

Freescale Semiconductor

Page 41 Page 43
Page 42
Image 42
Freescale Semiconductor MC68HC908MR32, MC68HC908MR16 manual Flash Programming Flowchart
Page 41 Page 43

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.
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