9.4.10 USB HUB Endpoint 0 Data Registers 0-7 (HE0D0-HE0D7)

Address:

$0030

 

 

 

 

 

 

 

 

Bit 7

6

5

4

3

2

1

Bit 0

 

 

 

 

 

 

 

 

 

Read:

HE0R07

HE0R06

HE0R05

HE0R04

HE0R03

HE0R02

HE0R01

HE0R00

 

 

 

 

 

 

 

 

 

Write:

HE0T07

HE0T06

HE0T05

HE0T04

HE0T03

HE0T02

HE0T01

HE0T00

 

 

 

 

 

 

 

 

 

Reset:

X

X

X

X

X

X

X

X

 

 

 

 

 

 

 

Address:

$0037

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Read:

HE0R77

HE0R76

HE0R75

HE0R74

HE0R73

HE0R72

HE0R71

HE0R70

 

 

 

 

 

 

 

 

 

Write:

HE0T77

HE0T76

HE0T75

HE0T74

HE0T73

HE0T72

HE0T71

HE0T70

 

 

 

 

 

 

 

 

 

Reset:

X

X

X

X

X

X

X

X

X = Indeterminate

Figure 9-11. USB HUB Endpoint 0 Data Register (HE0D0-HE0D7)

HE0Rx7-HE0Rx0 — HUB Endpoint 0 Receive Data Buffer

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

HE0Tx7-HE0Tx0 — HUB Endpoint 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 HUB Endpoint 0.

9.5 I/O Register Description of the Embedded Device Function

The USB embedded device function provides a set of control/status registers and twenty-four data registers that provide storage for the buffering of data between the USB embedded device function and the CPU. These registers are shown in Table 9-3and Table 9-4.

Advance Information

MC68HC(7)08KH12 Rev. 1.1

 

 

134

Freescale Semiconductor

Page 134
Image 134
Freescale Semiconductor MC68HC08KH12 manual I/O Register Description of the Embedded Device Function, 134

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.