147

DSTALL1 — Embedded De vice Endpoint 1 Force Stall Bit

This read/write bit causes embedded device Endpoint 1 to return a

STALL handshake when polled by either an IN or OUT token by the

USB Host Controller. Reset clears this bit.

1 = Send STALL handshake

0 = Default

9.5.8 USB Embedded Device Endpoint 0 Data Registers (DE0D0-DE0D7)

Address: $0020
	Bit 7	6	5	4	3	2	1	Bit 0

Read:	DE0R07	DE0R06	DE0R05	DE0R04	DE0R03	DE0R02	DE0R01	DE0R00

Write:	DE0T07	DE0T06	DE0T05	DE0T04	DE0T03	DE0T02	DE0T01	DE0T00

Reset:	X	X	X	X	X	X	X	X
↓								↓
Address: $0027

Read:	DE0R77	DE0R76	DE0R75	DE0R74	DE0R73	DE0R72	DE0R71	DE0R70

Write:	DE0T77	DE0T76	DE0T75	DE0T74	DE0T73	DE0T72	DE0T71	DE0T70

Reset:	X	X	X	X	X	X	X	X

X = Indeterminate

Figure 9-19. USB Embedded Device Endpoint 0 Data Register

(UE0D0-UE0D7)

DE0Rx7-DE0Rx0 — Embedded Device Endpoint 0 Receive Data Buffer

These read only bits are serially loaded with OUT token or SETUP token data directed at embedded device Endpoint 0. The data is received over the USB’s D0+ and D0– pins.

DE0Tx7-DE0Tx0 — Embedded Device E ndpoint 0 Transmit Data Buffer

These write only buffers are loaded by software with data to be sent on the USB bus on the next IN token directed at embedded device Endpoint 0.

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

Freescale Semiconductor	147

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 USB Embedded Device Endpoint 0 Data Register UE0D0-UE0D7

Models: MC68HC08KH12

Figure 9-19. USB Embedded Device Endpoint 0 Data Register

(UE0D0-UE0D7)

MC68HC08KH12 specifications