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The power connector on this board is rated for 5 V at 3 A. The plug for the connector is a standard, center-positive 5.5mm plug with a 1.65mm center pin hole.
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DE-9 RS-232 Connector
The RS-232 connector is a male DE9DE-9 (more commonly referred to as DB-9) connector. Like PCs, the BrightSign HD series of players are DTE devices. The input to the chip accepts a range between +30V and -30V, so it is compatible with standard +12V and -12V signaling. The output from the chip is rated at a typical +7V and -7V, which exceeds the voltage required by the RS-232 specification.
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The following diagram illustrates the behavior of the TX and RX signal:
The following table illustrates the pinout of the DE9 on the HD series of players:
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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 3.3 V at 24 mA, 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 DA15 connector. The connector can also supply 3.3 V at up to 500 mA to an external device. The 3.3 V output is polyfuse-protected and can source up to 500 mA.
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The GPIO outputs have 100Ω series resistors; the GPIO inputs have 1K pullup resistors to 3.3V; and the input threshold on the 541 chips 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 illustrates the pinout of the DA15 on the HD series of players:
pin | Description | pin | Description |
1 | IR blaster input | 2 | Ground |
3 | Button 6 I/O | 4 | Button 5 I/O |
5 | Button 3 I/O | 6 | Ground |
7 | Button 1 I/O | 8 | +3.3V output at 500mA |
9 | Ground | 10 | Button 7 I/O |
11 | Ground | 12 | Button 4 I/O |
13 | Button 2 I/O | 14 | Ground |
15 | Button 0 I/O | -- | -- |
Here is the DA15 female as viewed from the front of the BrightSign HD120 and HD1020:
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pin | Description | pin | Description |
1 | TX2p | 2 | Ground |
3 | TX2n | 4 | TX1p |
5 | Ground | 6 | TX1n |
7 | TX0p | 8 | Ground |
9 | TX0n | 10 | TXCp |
11 | Ground | 12 | TXCn |
13 | CEC | 14 | NC |
15 | DDC SCL | 16 | DDC SDA |
17 | Ground | 18 | +5V DDC |
19 | HDP (Hot Plug Direct) | -- |