Configuration Register | Freescale Semiconductor MC68HC908MR32

Configuration Register (CONFIG)

5.3 Configuration Register

Address:

Read:

Write:

Reset:

$001F
Bit 7	6	5	4	3	2	1	Bit 0

EDGE	BOTNEG	TOPNEG	INDEP	LVIRST	LVIPWR	STOPE	COPD

0	0	0	0	1	1	0	0

Figure 5-1. Configuration Register (CONFIG)

EDGE — Edge-Align Enable Bit

EDGE determines if the motor control PWM will operate in edge-aligned mode or center-aligned mode. See Chapter 12 Pulse-Width Modulator for Motor Control (PWMMC).

1= Edge-aligned mode enabled

0= Center-aligned mode enabled

BOTNEG — Bottom-Side PWM Polarity Bit

BOTNEG determines if the bottom-side PWMs will have positive or negative polarity. See Chapter 12 Pulse-Width Modulator for Motor Control (PWMMC).

1 = Negative polarity

0 = Positive polarity

TOPNEG — Top-Side PWM Polarity Bit

TOPNEG determines if the top-side PWMs will have positive or negative polarity. See Chapter 12 Pulse-Width Modulator for Motor Control (PWMMC).

1 = Negative polarity

0 = Positive polarity

INDEP — Independent Mode Enable Bit

INDEP determines if the motor control PWMs will be six independent PWMs or three complementary PWM pairs. See Chapter 12 Pulse-Width Modulator for Motor Control (PWMMC).

1 = Six independent PWMs

0 = Three complementary PWM pairs

LVIRST — LVI Reset Enable Bit

LVIRST enables the reset signal from the LVI module. See Chapter 9 Low-Voltage Inhibit (LVI).

1 = LVI module resets enabled

0 = LVI module resets disabled

LVIPWR — LVI Power Enable Bit

LVIPWR enables the LVI module. Chapter 9 Low-Voltage Inhibit (LVI) 1 = LVI module power enabled

0 = LVI module power disabled

STOPE — Stop Enable Bit

Writing a 0 or a 1 to bit 1 has no effect on MCU operation. Bit 1 operates the same as the other bits within this write-once register operate.

1 = STOP mode enabled

0 = STOP mode disabled

COPD — COP Disable Bit

COPD disables the COP module. See Chapter 6 Computer Operating Properly (COP). 1 = COP module disabled

0 = COP module enabled

MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1

74	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, MC68HC908MR16 manual Configuration Register

Models: MC68HC908MR16 MC68HC908MR32