Oki ML421 Maintenance Manual - Page 18

B Receptacle Upstream Input to the USB Device

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Oki Data CONFIDENTIAL (2) Universal Serial Bus (USB) Universal Serial Bus Specification Revision 1.0 compliance. 1) Connector • Printer Side • Cable Side : "B" Receptacle (Upstream Input to the USB Device) : Series "B" Plug 2) Cable • Cable Length : Approx 1.8m (A cable must be met USB Spec Rev 1.1 for normal operation) Note: Cable is not supplied. 3) Table of USB I / F signals Contact Number 1 2 3 4 Shell Signal Name Vbus D D + GND Shield Typical Wiring Assignment Red White Green Black Drain Wire 4) Connector pin arrangement 2 1 3 4 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 TxD+ Full-speed Buffer Rs 3.3 V 1.5 kΩ Rs TxD- Rs = 22 Ω 42113901 Rev.2 18 /

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42113901
Rev.2
18 /
Oki
Data
CONFIDENTIAL
(2)
Universal Serial Bus (USB)
Universal Serial Bus Specification Revision 1.0 compliance.
1)
Connector
•
Printer Side
: “B” Receptacle (Upstream Input to the USB Device)
•
Cable Side
: Series “B” Plug
2)
Cable
•
Cable Length
: Approx 1.8m (A cable must be met USB Spec Rev 1.1 for
normal operation)
Note:
Cable is not supplied.
3)
Table of USB I / F signals
Contact
Signal Name
Typical Wiring
Number
Assignment
1
Vbus
Red
2
D -
White
3
D +
Green
4
GND
Black
Shell
Shield
Drain Wire
4)
Connector pin arrangement
2
3
4
1
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
3.3 V
1.5 k
Ω
Rs = 22
Ω
TxD+
Rs
Full-speed
Buffer
Rs
TxD-