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Freescale Semiconductor MC68HC08KH12 manual I/O Signals

Models: MC68HC08KH12

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8.5 I/O Signals

The following paragraphs describe the CGM I/O signals.

8.5.1 Crystal Amplifier Input Pin (OSC1)

The OSC1 pin is an input to the crystal oscillator amplifier.

8.5.2 Crystal Amplifier Output Pin (OSC2)

The OSC2 pin is the output of the crystal oscillator inverting amplifier.

8.5.3 External Filter Capacitor Pin (CGMXFC)

The CGMXFC pin is required by the loop filter to filter out phase corrections. A small external capacitor is connected to this pin.

NOTE: To prevent noise problems, CF should be placed as close to the CGMXFC pin as possible, with minimum routing distances and no routing of other signals across the CF connection.

8.5.4 PLL Analog Power Pin (VDDA)

VDDA is a power pin used by the analog portions of the PLL. Connect the

VDDA pin to the same voltage potential as the VDD pin.

NOTE: Route VDDA carefully for maximum noise immunity and place bypass capacitors as close as possible to the package.

8.5.5 PLL Analog Ground Pin (VSSA)

VSSA is a ground pin used by the analog portions of the PLL. Connect the VSSA pin to the same voltage potential as the VSS pin.

NOTE: Route VSSA carefully for maximum noise immunity and place bypass capacitors as close as possible to the package.

Advance Information

MC68HC(7)08KH12 — Rev. 1.1

 

 

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Freescale Semiconductor

Page 97 Page 99
Page 98
Image 98
Freescale Semiconductor MC68HC08KH12 manual I/O Signals
Page 97 Page 99

MC68HC08KH12 specifications

The Freescale Semiconductor MC68HC08KH12 is a versatile microcontroller that has gained popularity in various embedded systems applications. Part of the HC08 family, this microcontroller combines a robust architecture with comprehensive on-chip features, making it suitable for a wide range of applications ranging from industrial control to consumer electronics.

One of the main features of the MC68HC08KH12 is its 8-bit architecture, which provides an optimal balance between performance and power efficiency. It operates at clock speeds of up to 2 MHz, allowing for efficient execution of instructions while maintaining low power consumption. The microcontroller is designed to operate over a voltage range of 2.7 to 5.5 volts, making it adaptable to various system requirements.

The MC68HC08KH12 is equipped with 1 Kbyte of RAM and 12 Kbytes of ROM, which allows for substantial program and data storage. The on-chip memory helps reduce the need for external components, simplifying the design of embedded systems and enhancing reliability. With a wide range of I/O options, including 26 general-purpose I/O pins, the microcontroller provides flexibility in interfacing with sensors, actuators, and other devices.

In terms of technologies, the MC68HC08KH12 features an advanced instruction set that enhances programming efficiency. It supports basic arithmetic operations, bit manipulation, and control transfer instructions, making it suitable for a variety of computational tasks. The integrated timers, analog-to-digital converters, and serial communication interfaces, including UART, provide the necessary tools for real-time control and data exchange with peripheral devices.

Another characteristic of the MC68HC08KH12 is its low power mode capabilities, which allow it to enter a sleep state during periods of inactivity. This feature is essential in battery-powered applications, where minimizing power consumption is crucial for extending operational life.

Overall, the Freescale Semiconductor MC68HC08KH12 stands out as a reliable microcontroller that combines performance, flexibility, and power efficiency. Its extensive features and technologies enable engineers to design robust embedded systems that meet the demands of modern applications. As a result, the MC68HC08KH12 remains a valuable choice for developers seeking a highly functional yet cost-effective microcontroller solution.