Epson TM-H6000IV with Validation Technical Reference Guide - Page 123
USB (Universal Serial Bus) Interface, Outline, USB transmission specifications
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Appendix USB (Universal Serial Bus) Interface Outline • Full-speed transmission at 12 Mbps [bps: bits per second] • Plug & Play, Hot Insertion & Removal 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) USB bulk OUT (TM) USB bulk IN (TM) USB device class According to USB 2.0 specifications USB Full-Speed (12 Mbps) USB bulk transmission method USB self power supply function 2 mA 64 bytes 64 bytes USB vendor-defined class 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, status 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 canceled. 123
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