Oki ML420 Maintenance Manual page 18

(2) Universal Serial Bus (USB)
Universal Serial Bus Specification Revision 1.0 compliance.
1) Connector
• Printer Side
• Cable Side
2) Cable
• Cable Length
Note: Cable is not supplied.
3) Table of USB I / F signals
4) Connector pin arrangement
5) Mode & Class of Device
• Full - speed Driver
• Self - powered Device
6) Data Signaling Rate
• Full - speed function - 12Mb/s ± 0.25%(2500ppm)
7) Receive Buffer
• 2044K Bytes
8) Interface circuit
42113901TH01 Rev.3
: "B" Receptacle (Upstream Input to the USB Device)
: Series "B" Plug
: Approx 1.8m (A cable must be met USB Spec Rev 1.1 for
normal operation)
Contact Signal Name
Number
1 Vbus
2 D -
3 D +
4 GND
Shell Shield
2 1
3 4
Full-speed
Buffer
Rs
TxD+
Rs
TxD-
Rs = 22 Ω
Typical Wiring
Assignment
Red
White
Green
Black
Drain Wire
3.3 V
1.5 kΩ
Oki Data CONFIDENTIAL
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