MC68HC908JG16FA MOTOROLA [Motorola, Inc], MC68HC908JG16FA Datasheet - Page 171
MC68HC908JG16FA
Manufacturer Part Number
MC68HC908JG16FA
Description
Microcontrollers
Manufacturer
MOTOROLA [Motorola, Inc]
Datasheet
1.MC68HC908JG16FA.pdf
(324 pages)
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11.5.2 Reset Signaling
MC68HC908JG16
MOTOROLA
—
Rev. 1.0
The width of the SE0 in the EOP is about two bit times. The EOP width
is measured with the same capacitive load used for maximum rise and
fall times and is measured at the same level as the differential signal
crossover points of the data lines.
The USB module will detect a reset signaled on the bus by the presence
of an extended SE0 at the USB data pins of a device. The MCU seeing
a single-ended 0 on its USB data inputs for more than 8 s treats that
signal as a reset.
A USB sourced reset will hold the MCU in reset for the duration of the
reset on the USB bus. The USB bit in the reset status register (SRSR)
will be set after the internal reset is removed. Refer to
Status Register (SRSR)
sequence is detailed in
t
V
V
V
Period
V
OH
SE
SE
OL
Freescale Semiconductor, Inc.
DIFFERENTIAL
DATA LINES
(min.)
(max)
(min.)
(min.)
V
For More Information On This Product,
SS
Universal Serial Bus Module (USB)
Figure 11-7. EOP Transaction Voltage Levels
Go to: www.freescale.com
Figure 11-8. EOP Width Timing
Section 8. System Integration Module
for more detail. The MCU’s reset recovery
LAST BIT OF
PACKET
Universal Serial Bus Module (USB)
CROSSOVER
WIDTH
LEVEL
EOP
STROBE
DATA
EOP
Functional Description
8.8.2 SIM Reset
BUS DRIVEN TO
IDLE STATE
Technical Data
BUS FLOATS
BUS IDLE
(SIM).
171
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