Interface Specifications; Usb Interface - Epson Perfection 1250 Service Manual

EPSON Perfection 1250/1250 PHOTO

6.2 Interface Specifications

This scanner is equipped with a standard USB interface as described below.

6.2.1 USB Interface

The scanner has the following configuration specifications.
Max. packet size or end point 0: 8 bytes
Vendor ID: 0x04B8
Device
Product ID: 0x010F
No. of connectors: 1
Interfaces supported: 1
Characteristics
• Self-powering
Configuration
• Remote
• Wake-up function not yet supported
• Bus power consumption: 2 mA
Alternate setting values: None
Interface 0
No. of end points: 3
Interrupt IN transfer
End point 1
Max. packet size: 1 byte
Bulk In transfer
End point 2
Max. packet size: 64 bytes
Bulk out transfer
End point 3
Max. packet size: 64 bytes
Manufacturer's name: "EPSON"
String descriptor
Product name: "Perfection 1250/1250 PHOTO"
Electrical specifications Conforms to high-speed (12 Mbps) mode
specifications in the Universal Serial Bus
specifications Revision 1.1
.
Connector B receptacle x 1
Figure 6-2. B Receptacle Pin Layout
Pin No.
1
2
3
4
Appendix
Signal
VCC
–Data
+Data
GND
48