BrightSign HD222, HD1022
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All information provided in this reference manual applies to products under development. The characteristics and specifications of these products are subject to
change without notice. BrightSign assumes no obligation regarding future manufacturing unless otherwise agreed to in writing. © BrightSign LLC, 2015
HARDWARE INTERFACES
This section describes the characteristics and operation of all connectors on the HD222 and HD1022.
Power Connector
The power connector for the HD222 and HD1022 is rated for 5V @ 3A. The plug for the connector is a standard, center-
positive 5.5mm plug with a 1.65mm center pin hole.
DE9 RS-232 Serial
The RS-232 interface is a male DE9 connector. The HD1022 player is a DTE device, similar to a PC. The input to the chip
accepts a range between +25V and -25V, so it is compatible with +12V/-12V signaling.
The baud rate of the RS-232 interface (which is controlled by system software) is 115200, with no parity, 8 data bits, and
1 stop bit. The RS-232 interface supports RTS/CTS hardware flow control, but no software flow control. The maximum
cable length is 50 meters, and the total cable capacitance is 2500pF.
Note: A lower capacitance cable allows you to use cable lengths beyond 50 meters.
The following diagram illustrates the behavior of the TX and RX signal:
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