Rev. 3.02
- 27 -
SRP-270
3-5-4 USB2.0 Interface
SRP-270 support the USB (Universal Serial Bus) Serial Communication.
3-5-4(a) Specification
Item Description Remark
Transfer Type • BULK
Data Signal
• Bi-direction, Half-Duplex
• Differential Signal Pair (D+ / D-)
Data Format
• NRZI Format
• Zero Bit Stuffing after 6 ones
Transceiver
• Differential Receive Sensitivity : 200[mV]
• Differential common Mode Range : 0.8 ~ 2.5[V]
• Single-End Receiver Threshold : 0.8 ~ 2.0[V]
Speed • 12 Mbps
Power • Self-Powered
Cable & Connector
• Cable : 5m / 2m
• Connector : B Type
Other • Support USB SPEC V1.1
Table 3-20 USB Specification
3-5-4(b) Signal Description
Pin No. Signal Name Assignment(Color) Function
Shell Shield Drain Wire Frame Ground
1 VBUS Red Host Power : DC5[V] / 500[mA]
2 D- White Differential Data Line
3 D+ Green Differential Data Line
4 GND Black Signal Ground
Table 3-21 USB Pin Description
3-5-4(c) USB I/F Cable
Figure 3-10 USB A-B Type Cable
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