HD5 Hardware Interfaces

this section describes the characteristics and operation of all connectors on the hd225 and hd1025 ethernet this connection is used to connect an ethernet cable for internet access the hd225 and hd1025 wired ethernet connection is capable of 10/100/1000 mbps the maximum length for cat 5e cable is 100 meters; the allowed length can be higher or lower depending on the quality of the cable power connector the power connector for the hd225 and hd1025, which connects the power cord to the device, is rated for 12v\@3a it uses a locking connector to prevent inadvertent disconnections hdmi output the hdmi ® out connector on the hd225 and hd1025 is used to send digital video and audio to hdmi enabled sink devices cec control and avi are supported over each hdmi interface independently, and it can maintain the configured multiscreen layout if one of the hdmi outputs loses sync the hd225 and hd1025 support at least two simultaneous 1920x1080x60p decodes gpio the hd225 and hd1025 have a 12 pin gpio switch and led connector, which allows the player to control external leds or other devices requiring 24ma of current or less the gpio port is a standard design manufactured by phoenix contact, wurth electronics, and others pluggable gpio terminal blocks can be inserted into the gpio connector to make bare wire contacts (see here https //www digikey com/short/3101mw for an example part) these terminal blocks can be purchased from the brightsign store https //www brightsign biz/digital signage products/accessories/gpio terminal block if you wish to source your own terminal blocks, make sure to use 4 pin or 6 pin blocks (12 pin blocks are extremely difficult to remove from the gpio port) connect the led outputs to the led anode and connect the led cathode to the ground if you want to connect another device, then the output is capable of sourcing or sinking up to 3 3v at 24ma, but there is a series resistor of 100ω in each line the gpio also allows for connecting of external contact closures to the ground in order to connect a switch, connect one side of the switch to the switch input, and connect the other side to one of the ground pins on the gpio connector the connector can also supply 3 3v at up to 500ma to an external device (available in rev g and higher) the 3 3v output is polyfuse protected and can source up to 500ma if one brightsign player is driving the inputs on another brightsign player, then you can drive at most three inputs from one output the following calculations explain this limitation the gpio outputs have 100ω series resistors; the gpio inputs have 1k pullup resistors to 3 3v; and the input threshold is 2v high and 8v low the high voltage is not problematic, but the low voltage can be if there are too many inputs connected to one output 1 out driving 1 in v=3 3 100/(100+1,000)=0 3 1 out driving 2 in v=3 3 100/(100+500)=0 55 1 out driving 3 in v=3 3 100/(100+333 3)=0 76 1 out driving 4 in v=3 3 100/(100+250)= 94 (this is too high, so 1 output driving 3 inputs is the maximum) gpio pinout the following table illustrates the pinout of the gpio on the hd225 and hd1025 pin function pin function 1 gnd 7 gnd 2 3 3v 8 3 3v 3 button 0 9 button 4 4 button 1 10 button 5 5 button 2 11 button 6 6 button 3 12 button 7 the following schematic illustrates the pinout of the gpio connector ir input / output the ir blaster generates or receives a space encoded nec or pronto hex signal rc5 encoding is also supported the two transported bit values of the signal (0 and 1) are encoded using differing lengths of low time ir pulses the 3 5mm ir in/out port has the following pinout tip 3v\@50ma ring ir input sleeve ir output the sleeve is used as a ground during input operations serial the hd1025 contains an uart (asynchronous serial) interface it is a 3 5mm (1/8") jack that connects a serial modem or other devices that use a serial connector, and it uses ttl for communication the receiver will tolerate input voltages between 30v and +30v, with anything below 3v interpreted as a logical 1 the output signaling voltage output is +15v or 15v the default baud rate of the interface is 115200, with no parity, 8 data bits, and 1 stop bit these settings can be configured in the software the serial interface supports tx, rx, and ground only—rts/cts hardware flow control is not supported the following diagram illustrates the behavior of the tx and rx signal this 3 5mm serial port has the following configuration (from the perspective of the player) tip receive ring transmit sleeve ground brightsign players are dte devices, so communication with another dte device that uses a 3 5mm port would require a null modem cable or converter that transposes the tx/rx signals if the device communicating with the player uses a de9 (also known as db9) serial port, the serial cable should be wired as shown in the following diagram audio connector the hd225 and hd1025 have a dedicated 3 5mm stereo audio port and a combination analog/optical audio jack to transmit a digital audio signal, use an optical audio cable analog and digital audio cannot be transmitted simultaneously dolby audio is supported as a paid license the full scale voltage output of the analog audio is 2v rms the minimum load impedance is 32ω the analog audio connector has the following pinout tip left audio ring right audio sleeve ground for audio signal usb the hd1025 has one usb a 2 0 port to connect usb compatible devices this device provides 5v 1a over each usb port for peripheral devices wifi & antennas the hd225 and hd1025 models come equipped with an m 2 connector slot and two smt mounted sma connectors the m 2 slot supports m 2 pcie cards for wifi and bluetooth connectivity (sold separately), while the sma connectors facilitate the connection of external antennas