Canon BJC-55 Service Bulletin page 6

COMP. SYSTEMS
Light interception
Wavelength:
Intensity:
Light angle:
3) Transfer speed
4) Communication
method
5) Communication
distance
6) Maximum data
reception
7) Modulation method 3/16 RZI (Return to Zero Invert):
4-4-2. USB Interface
<Specifications>
1) Device structure
2) Data transfer
method
3) Input/output circuit No.
<Signal level>
Vcc: "H" level input voltage: +2.0V to +5.5V
"L" level input voltage: +0.0V to +0.8V
-Data, +Data: Differential input sensitivity: Min. 0.2V
4) Interface cable
5) Interface connector Printer-side: USB (Series B) receptacle
0.85 to 0.90 µm
4µ W/cm 2 to 500m W/cm
10µ W/cm to 500m W/cm
2
(when the communication speed is more than 0.576 MHz.)
Approx. ±15 o (along optical axis)
9600/19200/38400/57600/115.2k/576k/1.152M/4M bps
Half duplex, start/stop system (bidirectional):
when the transfer speed is less than 115.2kbps
Half duplex, frame synchronization system (bidirectional):
when the transfer speed is more than 0.576Mbps
0 to 1m: when the transfer speed is less than 115.2kbps
0 to 0.8m: when the transfer speed is more than 0.576Mbps
2048 byte/packet
when the transfer speed is less than 115.2kbps
1/4 RZI (Return to Zero Invert):
when the transfer speed is 0.576Mbps and 1.152Mbps
4 PPM (Pulse Position Modulation):
when the transfer speed is 4Mbps
Self-powered device
Half duplex serial interface
Universal Serial Bus Specification Revision 1.0 compatible
Universal Serial Bus Device Class Definition for Printing
Device Version 1.0 compatible
Signal rate: 12Mbps (full speed)
Transfer type: Control transfer/Bulk transfer
Signal name
1 Vcc
2 -Data
3 +Data
4 GND
"H" level input voltage: +2.8V to +3.6V
"L" level input voltage: +0.0V to +0.3V
Material: AWG No.28 or larger
Full speed device cable (twisted pair shielded cable)
Less than 5 m
Cable-side: USB (Series B) plug
- 6 -
2
2
Data signal line
Data signal line
PRNT-896
2 1
3 4
Series B