NOTE: A sequence of IREAD or IWRITE commands can sequentially access a block of memory over the full 64-Kbyte memory map.

Table 10-7. READSP (Read Stack Pointer) Command

Description

Reads stack pointer

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Operand

None

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Data Returned

Returns stack pointer in high byte:low byte order

 

 

 

 

 

 

 

 

 

 

 

 

Opcode

$0C

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Command Sequence

 

 

 

 

SENT TO

 

 

 

 

 

 

 

 

MONITOR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

READSP

 

 

READSP

SP HIGH

 

SP LOW

 

 

 

 

 

 

 

 

 

 

 

 

ECHO

RESULT

Table 10-8. RUN (Run User Program) Command

Description

Executes RTI instruction

 

 

 

 

 

 

 

 

 

Operand

None

 

 

 

 

 

 

 

 

 

Data Returned

None

 

 

 

 

 

 

 

 

 

Opcode

$28

 

 

 

 

 

 

 

 

 

 

 

Command Sequence

SENT TO

 

 

 

 

 

MONITOR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

RUN

 

 

RUN

ECHO

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Advance Information

MC68HC(7)08KH12 Rev. 1.1

 

 

158

Freescale Semiconductor

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Freescale Semiconductor MC68HC08KH12 manual Readsp Read Stack Pointer Command, RUN Run User Program Command, 158

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.