1 = DATA1 Token active for next embedded device Endpoint 0 transmit

0 = DATA0 Token active for next embedded device Endpoint 0 transmit

DSTALL0 — Embedded De vice Endpoint 0 Force Stall Bit

This read/write bit causes embedded device Endpoint 0 to return a STALL handshake when polled by either an IN or OUT token by the host. The USB hardware clears this bit when a SETUP token is received. Reset clears this bit.

1 = Send STALL handshake

0 = Default

TX0E — Embedded Device E ndpoint 0 Transmit Enable

This read/write bit enables a transmit to occur when the USB Host controller sends an IN token to the embedded device Endpoint 0. Software should set this bit when data is ready to be transmitted. It must be cleared by software when no more embedded device Endpoint 0 data needs to be transmitted.

If this bit is 0 or the TXD0F is set, the USB will respond with a NAK handshake to any embedded device Endpoint 0 IN tokens. Reset clears this bit.

1 = Data is ready to be sent

0 = Data is not ready. Respond with NAK

RX0E — Embedded Device E ndpoint 0 Receive Enable

This read/write bit enables a receive to occur when the USB Host controller sends an OUT token to the embedded device Endpoint 0. Software should set this bit when data is ready to be received. It must be cleared by software when data cannot be received.

If this bit is 0 or the RXD0F is set, the USB will respond with a NAK handshake to any embedded device Endpoint 0 OUT tokens. Reset clears this bit.

1 = Data is ready to be received

0 = Not ready for data. Respond with NAK

Advance Information

MC68HC(7)08KH12 — Rev. 1.1

 

 

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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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