Table 15-1. KBI I/O Register Summary

Addr.

Register Name

Port D Keyboard Status and

$000CControl Register

(KBDSCR)

 

Port D Keyboard Interrupt

$000D

Enable Register

 

(KBDIER)

 

Port E Keyboard Status and

$000E

Control Register

 

(KBESCR)

 

Port E Keyboard Interrupt

$000F

Enable Register

 

(KBEIER)

 

Port F Keyboard Status and

$0040

Control Register

 

(KBFSCR)

 

Port F Keyboard Interrupt

$0041

Enable Register

 

(KBFIER)

 

Port F Pull-up Enable

$0042

Register

 

(PFPER)

 

Bit 7

6

5

4

3

2

1

Bit 0

 

 

 

 

 

 

 

 

 

Read:

0

0

0

0

KEYDF

0

IMASKD

MODED

Write:

 

 

 

 

 

 

 

 

 

 

 

ACKD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Reset:

0

0

0

0

0

0

0

0

 

 

 

 

 

 

 

 

 

Read:

KBDIE7

KBDIE6

KBDIE5

KBDIE4

KBDIE3

KBDIE2

KBDIE1

KBDIE0

Write:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Reset:

0

0

0

0

0

0

0

0

 

 

 

 

 

 

 

 

 

Read:

0

0

0

0

KEYEF

0

IMASKE

MODEE

Write:

 

 

 

 

 

 

 

 

 

 

 

ACKE

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Reset:

0

0

0

0

0

0

0

0

 

 

 

 

 

 

 

 

 

Read:

PEPE3

PEPE2

PEPE1

PEPE0

KBEIE3

KBEIE2

KBEIE1

KBEIE0

Write:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Reset:

0

0

0

0

0

0

0

0

 

 

 

 

 

 

 

 

 

Read:

0

0

0

0

KEYFF

0

IMASKF

MODEF

Write:

 

 

 

 

 

 

 

 

 

 

 

ACKF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Reset:

0

0

0

0

0

0

0

0

 

 

 

 

 

 

 

 

 

Read:

KBFIE7

KBFIE6

KBFIE5

KBFIE4

KBFIE3

KBFIE2

KBFIE1

KBFIE0

Write:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Reset:

0

0

0

0

0

0

0

0

 

 

 

 

 

 

 

 

 

Read:

PFPE7

PFPE6

PFPE5

PFPE4

PFPE3

PFPE2

PFPE1

PFPE0

Write:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Reset:

1

1

1

1

1

1

1

1

 

 

= Unimplemented

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

MC68HC(7)08KH12 — Rev. 1.1

Advance Information

 

 

Freescale Semiconductor

221

Page 220 Page 222
Page 221
Image 221
Freescale Semiconductor MC68HC08KH12 manual KBI I/O Register Summary, 221
Page 220 Page 222

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.
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