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Rev. 2.01
- 28 -
SRP-350/352plusA&C
3-5-3 USB2.0 Interface
SRP-350plus support the USB (Universal Serial Bus) Serial Communication.
3-5-3(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 3-18 USB Specification
3-5-3(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 3-19 USB Pin Description
3-5-3(c) Cable
USB cable consists of four conductors, two power conductors, and two signal conductors.
High-/full-speed cable consists of a signaling twisted pair, VBUS, GND, and an overall shield. High-/full
speed cable must be marked to indicate suitability for USB usage. High-/full-speed cable may be used with
either low-speed, full-speed, or high-speed devices. When high-/full-speed cable used with low-speed
devices, the cable must meet all low-speed requirements.
Low-speed recommends, but does not require the use of a cable with twisted signaling conductors.