PWM Disabling Scheme | Freescale Semiconductor MC68HC908MR32

Pulse-Width Modulator for Motor Control (PWMMC)

			CYCLE START	DISX	SOFTWARE X DISABLE
			CYCLE START		SOFTWARE X DISABLE
					S	Q
					R
			FMODE2				BANK X
			FMODE2	AUTO	FAULT PIN 2 DISABLE		DISABLE
				AUTO
LOGIC HIGH FOR FAULT			FPIN2	MODE	S	Q
			FPIN2

	TWO	ONE			R
	SAMPLE	ONE	S	Q FFLAG2	R
FAULT	SAMPLE	SHOT
FAULT	FILTER	SHOT
PIN2	FILTER			MANUAL
PIN2			R	MODE
			R	MODE
	CLEAR BY WRITING 1 TO FTACK4
				FINT2			INTERRUPT REQUEST
				FINT2

The example is of fault pin 2 with DISX. Fault pin 4 with DISY is logically similar and affects BANK Y disable.

Note: In manual mode (FMODE = 0), faults 2 and 4 may be cleared only if a logic level low at the input of the fault pin is present.

CYCLE START

			FMODE1			FAULT PIN 1 DISABLE
		FPIN1				AUTO
LOGIC HIGH FOR FAULT		FPIN1				MODE
						MODE	Q	BANK X DISABLE
						S	Q	BANK X DISABLE
FAULT	TWO	ONE				R
FAULT	SAMPLE	ONE	S	Q		R
PIN1	FILTER	SHOT	S	Q	FFLAG1	MANUAL
			R			MODE
	CLEAR BY WRITING 1 TO FTACK1

INTERRUPT REQUEST

FINT1

The example is of fault pin 1. Fault pin 3 is logically similar and affects BANK Y disable.

Note: In manual mode (FMODE = 0), faults 1 and 3 may be cleared regardless of the logic level at the input of the fault pin.

Figure 12-26. PWM Disabling Scheme

MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1

138	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 PWM Disabling Scheme

Models: MC68HC908MR16 MC68HC908MR32

Pulse-Width Modulator for Motor Control (PWMMC)

Figure 12-26. PWM Disabling Scheme

MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1

Freescale Semiconductor

MC68HC908MR16, MC68HC908MR32 specifications