mc68hc908ld64 Freescale Semiconductor, Inc, mc68hc908ld64 Datasheet - Page 352

• Manufacturer Part Number: mc68hc908ld64
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Electrical Specifications
24.12.3 HUB Repeater Electrical Characteristics
Data Sheet
352
Notes:
Low Speed HUB Electrical Characteristics
HUB differential data delay
HUB differential driver jitter
(including cable)
Downstream:
Upstream
Data bit width distortion after EOP.
HUB EOP delay relative to T
HUB EOP output width skew
Full Speed HUB Electrical Characteristics
HUB differential data delay
HUB differential driver jitter
(including cable)
Data bit width distortion after SOP
HUB EOP delay relative to T
HUB EOP output width skew
1. All voltages measured from local ground, unless otherwise specified.
2. All timings use a capacitive load of (C
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. Timing differences between the differential data signals.
6. Measured at crossover point of differential data signals.
Measured from 10% to 90% of the data signal.
The rising and falling edges should be smoothly transitioning (monotonic).
The maximum load specification is the maximum effective capacitive load allowed that meets the target HUB VBUS droop of 330mV.
To next transition
For paired transitions
To next transition
For paired transitions
(with cable)
(without cable)
To next transition
For paired transitions
Characteristic
Characteristic
Table 24-13. HUB Repeater Electrical Characteristics
HDD
HDD
L
) to ground of 50pF, unless otherwise specified.
Symbol
Symbol
T
T
T
T
T
T
T
T
T
T
T
T
T
T
T
LEOPD
LHESK
LDHJ1
LDHJ2
LUHJ1
LUHJ2
LHDD
HDD1
HDD1
EOPD
HESK
Electrical Specifications
HDJ1
HDJ2
EOP
SOP
Note
Note
(Notes 1,2,3)
Note
Note
Note
Conditions
Conditions
(Root port and downstream ports configured as full speed)
Note
Note
Note
Note
Note
Note
(Root port and downstream ports configured as low speed)
(1),(2),(3)
(3),(5),(6)
(3),(5),(6)
(4),(5),(6)
(4),(5),(6)
(4),(6)
(4),(6)
(4),(6)
(3),(6)
(3),(6)
(3),(6)
–300
Min
–45
–15
–60
Min
–15
–5
45
45
–3
–1
0
0
MC68HC908LD64
Typ
Typ
Freescale Semiconductor
Max
Max
300
200
300
45
15
45
45
60
70
40
15
15
3
1
5
—
Rev. 3.0
Unit
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns