17.12 HUB Repeater Electrical Characteristics

Low Speed HUB Electrical Characteristics (Root port and downstream ports configured as low speed)

Characteristic

Symbol

Conditions

Min

Typ

Max

Unit

(Notes 1,2,3)

 

 

 

 

 

 

 

 

 

 

 

 

 

HUB Differential Data Delay

TLHDD

Note 4, 7, 8

 

 

300

ns

 

 

 

 

 

 

 

HUB Differential Driver Jitter

 

 

 

 

 

 

(including cable)

 

 

 

 

 

 

Downstream:

 

 

 

 

 

 

To Next Transition

TLDHJ1

 

–45

 

45

ns

For Paired Transitions

TLDHJ2

Note 4, 7, 8

–15

 

15

ns

Upstream

 

 

 

 

 

 

To Next Transition

TLUHJ1

 

45

 

45

ns

For Paired Transitions

TLUHJ2

 

45

 

45

ns

Data bit width distortion after EOP.

TSOP

Note 4,8

–60

 

60

ns

 

 

 

 

 

 

 

HUB EOP Delay Relative to THDD

TLEOPD

Note 4,8

0

 

200

ns

 

 

 

 

 

 

 

HUB EOP Output Width Skew

TLHESK

Note 4,8

–300

 

300

ns

 

 

 

 

 

 

 

Full Speed HUB Electrical Characteristics (Root port and downstream ports configured as full speed)

Characteristic

Symbol

Conditions

Min

Typ

Max

Unit

(Notes 1,2,3)

 

 

 

 

 

 

 

 

 

 

 

 

 

HUB Differential Data Delay

 

 

 

 

 

 

(with cable)

THDD1

Note 3, 7, 8

 

 

70

ns

(without cable)

THDD1

 

 

 

40

ns

HUB Differential Driver Jitter

 

 

 

 

 

 

(including cable)

 

Note 3, 7, 8

 

 

 

 

To Next Transition

THDJ1

–3

 

3

ns

 

 

For Paired Transitions

THDJ2

 

–1

 

1

ns

Data bit width distortion after SOP.

TSOP

Note 3, 8

–5

 

5

ns

HUB EOP Delay Relative to THDD

TEOPD

Note 3, 8

0

 

15

ns

HUB EOP Output Width Skew

THESK

Note 3, 8

–15

 

15

ns

NOTES:

1.All voltages measured from local ground, unless otherwise specified.

2.All timings use a capacitive load of (CL) to ground of 50pF, unless otherwise specified.

3.Full speed timings have a 1.5kΩ pull-up to 2.8V on the D+ data line.

4.Low speed timings have a 1.5kΩ pull-up to 2.8V on the D– data line.

5.Measured from 10% to 90% of the data signal.

6.The rising and falling edges should be smoothly transitioning (monotonic).

7.Timing differences between the differential data signals.

8.Measured at crossover point of differential data signals.

9.The maximum load specification is the maximum effective capacitive load allowed that meets the target HUB VBUS droop of 330mV.

MC68HC(7)08KH12 — Rev. 1.1

Advance Information

 

 

Freescale Semiconductor

255

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Freescale Semiconductor MC68HC08KH12 manual HUB Repeater Electrical Characteristics, 255
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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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