PC-D320/PC-D340/FAX-L400 Chapter 1: General Description1-1321342.7 Interface SpcificationsSerial interface (USB)a) SpecificationsInterface TypeUSB Interface (Universal Serial Bus; USB Specification Release Number 1.10)Data TransmissionControl transfer methodBulk transfer methodSignal Voltage LevelInput:Input defference sensitivity: +0.2V (Max.)Common-mode defference: +0.8V to +2.5VOutput:Static output high: +2.8V to 3.6VStatic outpu low: less than +0.3VInput/OutputData signal pulled up with 3.3VVBUS signal pulled up with 5.5VInterface CableTwisted-pair shielded cableUSB standard compatible requiredMaterial AWG No. 28, Data pair (AWG: American Wire Gauge)AWG No. 20 to No. 28, Power distribution pairInterface ConnectorPrinter-side USB standard, Series B receptacleCable-side USB standard, Series B plugFigure 1-3 USB Connector (J1)J1 PC Signal name Description1 ← 1 VBUS Cable power supply (+5V DC)2 — 2 D– Data3 — 3 D+ Data4 — 4 GND Cable GND
