Control Logic Block

FFLAG1 — Fault Event Flag 1

The FFLAG1 event bit is set within two CPU cycles after a rising edge on fault pin 1. To clear the FFLAG1 bit, the user must write a 1 to the FTACK1 bit in the fault acknowledge register.

1 = A fault has occurred on fault pin 1.

0 = No new fault on fault pin 1.

12.9.10 Fault Acknowledge Register

The fault acknowledge register (FTACK) is used to acknowledge and clear the FFLAGs. In addition, it is used to monitor the current sensing bits to test proper operation.

Address:

$0024

 

 

 

 

 

 

 

 

Bit 7

6

5

4

3

2

1

Bit 0

 

 

 

 

 

 

 

 

 

Read:

0

0

DT6

DT5

DT4

DT3

DT2

DT1

 

 

 

 

 

 

 

 

 

Write:

 

FTACK4

 

FTACK3

 

FTACK2

 

FTACK1

Reset:

0

0

0

0

0

0

0

0

 

 

= Unimplemented

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 12-45. Fault Acknowledge Register (FTACK)

FTACK4 — Fault Acknowledge 4 Bit

The FTACK4 bit is used to acknowledge and clear FFLAG4. This bit will always read 0. Writing a 1 to this bit will clear FFLAG4. Writing a 0 will have no effect.

FTACK3 — Fault Acknowledge 3 Bit

The FTACK3 bit is used to acknowledge and clear FFLAG3. This bit will always read 0. Writing a 1 to this bit will clear FFLAG3. Writing a 0 will have no effect.

FTACK2 — Fault Acknowledge 2 Bit

The FTACK2 bit is used to acknowledge and clear FFLAG2. This bit will always read 0. Writing a 1 to this bit will clear FFLAG2. Writing a 0 will have no effect.

FTACK1 — Fault Acknowledge 1 Bit

The FTACK1 bit is used to acknowledge and clear FFLAG1. This bit will always read 0. Writing a 1 to this bit will clear FFLAG1. Writing a 0 will have no effect.

DT6 — Dead-Time 6 Bit

Current sensing pin IS3 is monitored immediately before dead-time ends due to the assertion of PWM6.

DT5 — Dead-Time 5 Bit

Current sensing pin IS3 is monitored immediately before dead-time ends due to the assertion of PWM5.

DT4 — Dead-Time 4 Bit

Current sensing pin IS2 is monitored immediately before dead-time ends due to the assertion of PWM4.

DT3 — Dead-Time 3 Bit

Current sensing pin IS2 is monitored immediately before dead-time ends due to the assertion of PWM3.

MC68HC908MR32 • MC68HC908MR16 Data Sheet, Rev. 6.1

Freescale Semiconductor

153

Page 152 Page 154
Page 153
Image 153
Freescale Semiconductor MC68HC908MR16, MC68HC908MR32 manual Fault Acknowledge Register
Page 152 Page 154

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.
Top Page Image Contents