Usb (Universal Serial Bus) Interface - Epson TM-T70II Technical Reference Manual

USB (Universal Serial Bus) Interface

Outline
• Full-speed transmission at 12 Mbps [bps: bits per second]
• Plug & Play, Hot Insertion & Removable
USB transmission specifications
USB function
Overall specifications
Transmission speed
Transmission method
Power supply specifications
Current consumed by USB bus
USB packet size (with full-speed connection)
Status transmission from printer with USB interface
In order to ensure that there is no lack of status data, it is necessary to periodically retrieve status
data at the host computer.
Unlike RS-232 transmission, it cannot spontaneously interrupt data transmission to the host
computer.
The printer has a 128-byte status data buffer. Statuses that exceed the buffer capacity are
cancelled.
According to USB 2.0 specifications
USB Full-Speed (12 Mbps)
USB bulk transmission method
USB self power supply function
2 mA
USB bulk OUT (TM) 64 bytes
USB bulk IN (TM) 64 bytes
Appendix
111