HO523 Hardware Interfaces

this section describes the characteristics and operation of all connectors on the ho523 rj45 lan the ho523 has an rj45 connector for 1000base t networking 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 usb the ho523 has two usb 2 0 type a ports, which are capable of transfer speeds up to 480 mbit/s the maximum length for a usb cable is 5 meters the following table illustrates the pinout of the usb 2 0 type a host ports pin description pin description 1 vbus 2 d 3 d+ 4 ground gpio the ho523 has a 6 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 are using the gpio connector to drive leds, 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 connector also allows the 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 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) the following table describes the pinout of the gpio on the ho523 pin function pin function 1 gnd 4 button 1 2 3 3v 5 button 2 3 button 0 6 button 3 the following schematic illustrates the pinout of the gpio connector 3 5mm ir input / output the ir blaster generates or receives a space encoded nec or pronto hex signal 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 3 3v ring ir input sleeve ir output the sleeve is used as a ground during input operations 3 5mm audio connector the ho523 has a combination analog/digital audio jack to transmit a digital audio signal, use a toslink optical audio cable with a 3 5mm connector analog and digital audio cannot be transmitted simultaneously 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 3 5mm serial the uart (asynchronous serial) interface is a 3 5mm (1/8") jack that uses ttl for communication the receiver will tolerate input voltages between 30v and +30v, with anything below 3v interpreted as a logical 1 the transmitter drives +5v for logical 0 and 0v for logical 1 brightsign players are dte devices, so communication with other dte devices requires a null modem cable or converter that transposes the tx/rx signals from the 3 5mm port the serial transmit pin does not comply with voltage levels for rs 232 signaling (which requires a voltage below 3v for logical 1) in practice, the serial port can interoperate successfully with the majority of rs 232 receivers, but some devices (including some projectors and crestron equipment) require strict conformance to rs 232 levels and will not accept 0v as logical 1 in these instances, you can connect the brightsign player to the serial device using a usb to serial cable 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 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 serial port, the serial cable should be wired as shown in the following diagram the following diagram illustrates the behavior of the tx and rx signal jae tx25 the ho523 features a single 80 pin jae tx25 connector (part no tx25 80p lt h1e) for interfacing with displays via the open pluggable specification http //www intel com/content/www/us/en/intelligent systems/digital signage/open pluggable specification simplify digital signage development html (ops) standard this interface provides the following features power dc in 12v 19v @ 8a max (1a per power pin) display interface tmds only audio left and right channel usb 4x usb 2 0 (2 to external, 1 to wifi, 1 to display) uart tx/rx serial communication the jae tx25 serial port enumerates as port 1 in brightauthor/brightscript control signaling pluggable module power status, power on via display panel, pluggable board detect, consumer electronics control (cec), system fan control bi directional transmit/receive pairs for the lan media dependent interface (mdi) are not supported jae tx25 can connect to two compliant receptacle connectors tx24 80r lt h1e (standard interface) and tx24a 80r lt h1e (high speed interface) we recommend the tx24a 80r lt h1e interface for all applications pin assignment the following table describes the pin assignments of the jae tx25 connector the i/o column is from the perspective of the ho523 pluggable board pin signal description i/o pin signal description i/o 40 +12v +19v power 80 gnd ground 39 +12v +19v power 79 gnd ground 38 +12v +19v power 78 gnd ground 37 +12v +19v power 77 gnd ground 36 +12v +19v power 76 gnd ground 35 +12v +19v power 75 gnd ground 34 +12v +19v power 74 pwr status powergood out (oc) 33 +12v +19v power 73 ps on# pluggable signal on in 32 gnd ground 72 pb det pluggable board detect out 31 dvi hpd hdmi ® in 71 cec consumer electronic control i/o 30 dvi ddc clk hdmi i/o 70 az lineout r audio rch out 29 dvi ddc data hdmi i/o 69 az lineout l audio lch out 28 gnd ground 68 gnd ground 27 tmds2+ hdmi out 67 usb pp0 usb 2 0 i/o 26 tmds2 hdmi out 66 usb pn0 usb 2 0 i/o 25 gnd ground 65 gnd ground 24 tmds1+ hdmi out 64 no connect 23 tmds1 hdmi out 63 no connect 22 gnd ground 62 gnd ground 21 tmds0+ hdmi out 61 no connect 20 tmds0 hdmi out 60 no connect 19 gnd ground 59 gnd ground 18 tmds clk+ hdmi out 58 no connect 17 tmds clk hdmi out 57 no connect 16 gnd ground 56 gnd gnd 15 no connect 55 no connect 14 no connect 54 no connect 13 no connect 53 no connect 12 gnd ground 52 uart txd uart 3 3v out 11 no connect 51 uart rxd uart 3 3v in 10 no connect 50 no connect 9 gnd ground 49 no connect 8 no connect 48 no connect 7 no connect 47 no connect 6 gnd ground 46 no connect 5 no connect 45 no connect 4 no connect 44 no connect 3 gnd ground 43 no connect 2 no connect 42 no connect 1 no connect 41 no connect see the ops specification for further details on pin signaling for the jae tx25