Stop Mode, 239 | Freescale Semiconductor MC68HC08KH12 guide

15.6.3.3 Port-F Pull-up Enable Register

The pulll-up enable register enables or disables the pull-up device for

port F.

Address:

Read:

Write:

Reset:

$0042
Bit 7	6	5	4	3	2	1	Bit 0

PFPE7	PFPE6	PFPE5	PFPE4	PFPE3	PFPE2	PFPE1	PFPE0

1	1	1	1	1	1	1	1

Figure 15-10. Port F Pull-up Enable Register (PFPER)

PFPE7–PFPE0 — Port F pull-up enable bits

These read/write bits enable/disable the pull-up device. Reset sets

DDRF7–DDRF0 to ‘1’s, enabling all port F pull-up devices.

1 = Corresponding port F pin pull-up device enabled

0 = Corresponding port F pin pull-up device disabled

15.7 Wait Mode

The keyboard modules remain active in wait mode. Clearing the IMASKx bit in the keyboard status and control register enables keyboard interrupt requests to bring the MCU out of wait mode.

15.8 Stop Mode

The keyboard modules remain active in stop mode. Clearing the IMASKx bit in the keyboard status and control register enables keyboard interrupt requests to bring the MCU out of stop mode.

15.9 Keyboard Module During Break Interrupts

The system integration module (SIM) controls whether the keyboard interrupt latch cam be cleared during the break state. The BCFE bit in

MC68HC(7)08KH12 — Rev. 1.1	Advance Information

Freescale Semiconductor	239

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.

Freescale Semiconductor MC68HC08KH12 Stop Mode, Keyboard Module During Break Interrupts, 239

Models: MC68HC08KH12