VDD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

68HC708

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10 kΩ

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RST

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0.1∝F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VDD + VHI

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10 Ω

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

IRQ1/VPP

 

 

 

 

 

 

 

 

 

 

 

 

 

VDD

 

VDDA

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

20

 

 

 

 

 

 

0.1∝F

 

 

 

 

 

 

MC145407

 

 

 

 

 

 

 

 

 

 

 

 

+

 

 

+

 

 

 

 

 

 

 

 

10∝F

 

 

 

10∝F

 

 

 

 

 

 

 

 

 

3

 

18

 

 

 

 

 

 

 

 

OSC1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

 

17

 

 

 

 

 

20pF

X1

 

10MΩ

 

 

 

 

 

 

 

 

 

 

4.9152MHz

 

 

 

 

 

 

 

 

 

 

 

 

VDD

 

 

 

10

∝

F

 

 

 

 

 

10

∝

F

 

 

 

OSC2

+

 

 

 

+

 

 

 

 

 

2

 

19

 

 

 

20pF

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DB-25

 

 

 

 

 

 

 

 

 

 

 

 

VSS2

 

5

 

 

 

 

 

 

 

 

 

 

VSS1

2

 

 

 

 

16

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VSSA

3

 

 

 

6

 

15

 

 

 

 

 

 

 

 

VDD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VDD1

7

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VDD2

 

 

 

 

 

 

 

 

 

 

 

 

 

VDD

 

0.1∝F

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

MC74HC125

14

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VDD

 

 

 

 

 

 

 

 

 

 

 

2

 

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

6

 

5

 

10kΩ

 

 

 

 

 

 

 

 

 

 

 

 

 

PA0

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

4

 

VDD

 

PC3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

VDD

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7

 

10kΩ

 

10kΩ

 

 

 

 

 

 

 

 

 

 

 

 

 

A

 

PC0

NOTES: Position A — Bus clock = CGMXCLK ⎟ 4

 

 

 

 

 

 

(See NOTE.)

B

PC1

 

 

 

 

 

 

PA7

 

 

 

 

 

 

 

 

 

 

Position B — Bus clock = CGMXCLK ⎟ 2

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 10-1. Monitor Mode Circuit

MC68HC(7)08KH12 — Rev. 1.1

Advance Information

 

 

Freescale Semiconductor

151

Page 150 Page 152
Page 151
Image 151
Freescale Semiconductor MC68HC08KH12 manual Monitor Mode Circuit, 151
Page 150 Page 152

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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