MOD5272-100IR NetBurner Inc, MOD5272-100IR Datasheet - Page 294

• Manufacturer Part Number: MOD5272-100IR
• Description: PROCESSOR MODULE FLASH MOD5272
• Manufacturer: NetBurner Inc
• Type: Controllers & Processorsr

Specifications of MOD5272-100IR

• Module/board Type: Processor Module
• Ethernet Connection Type: 10/100 Ethernet Port RJ-45
• Operating Voltage: 3.3 V
• Product: Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With/related Products: MOD5272
• For Use With: 528-1001 - KIT DEVELOP NETWORK FOR MOD5272
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 528-1008

Line Interface
A halted endpoint can be cleared in several different ways:
12.5 Line Interface
The recommended line interface is shown in Figure 12-24. The transistor used to control
the 1.5–kΩ pull-up resistor is optional.
12.5.1 Attachment Detection
The USB specification requires that a pull-up resistor must be placed on the D+ signal for
the upstream hub to detect attachment of a full-speed device. The user may optionally want
to control the attach/detach detection by software instead of only at power on and off. With
software control of the pull-up resistor, the user has unlimited time to initialize the USB
module. The software controlled pull-up resistor can be implemented with only a few
discrete components. The recommended circuit for implementing software control of the
pull-up resistor is shown in Figure 12-24.
12.5.2 PCB Layout Recommendations
The device has input protection on all pins and may source or sink a limited amount of
current without damage.
12-34
•
• A USB reset signal.
• A
• On control endpoints, a SETUP token for the next request.
CLEAR
MCF5272
SET
_
_
CONFIGURATION
FEATURE
Figure 12-24. Recommended USB Line Interface
GP I/O pin
USB_D+
USB_D-
request with the endpoint halt feature selector set.
or
100Ω
SET
MCF5272 User’s Manual
33Ω
33Ω
_
INTERFACE
1kΩ
3.3 V
request.
1.5kΩ±5%
Vbus
D+
D–
GND
USB
Series B
Receptacle
MOTOROLA