HDx22 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.
DE-9 RS-232 Serial
The RS-232 interface is a male DE-9 (more commonly referred to as DB-9) 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.
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:
The following table illustrates the pinout of the DE9 serial connector on the HD1022:
Pin | Description | Pin | Description |
|---|---|---|---|
1 | NC | 2 | Receive data into the device |
3 | Transmit data out of the device | 4 | Available 5V@500mA |
5 | Ground | 6 | NC |
7 | RTS | 8 | CTS |
9 | NC | -- | -- |
DA15 GPIO
The GPIO switch/led connector is a DA15 female. This connector is used to allow the player to control external LEDs or other devices requiring 24mA of current or less.
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 DA15 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 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 HD222 and HD1022:
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 HD222 and HD1022:
A button/LED/IR board can be used to demonstrate the GPIO and IR functions on a BrightSign player. This board is built by a third-party manufacturer and can be purchased upon request.
RJ45 Ethernet
The HD222 and HD1022 have an RJ45 connector for 10/100 base-T Ethernet. The maximum Ethernet-cable length is 100 meters.
The following table illustrates the pinout of the RJ45:
Pin | Description | Pin | Description |
|---|---|---|---|
1 | TX+ | 2 | TX- |
3 | RX+ | 4 | RC to ground |
5 | RC to ground | 6 | RX- |
7 | RC to ground | 8 | RC to ground |
USB
The HD1022 has a single USB 2.0 port, which is capable of transfer speeds up to 480 Mbit/s. The maximum length for a USB cable is 5 meters. The following tables illustrate the pinout of the USB 2.0 host ports:
Pin | Description | Pin | Description |
|---|---|---|---|
1 | VBUS | 2 | D- |
3 | D+ | 4 | Ground |
3.5mm Audio Connector
The HD222 and HD1022 have a single 3.5mm female audio connector, which transmits an analog stereo signal. The full-scale voltage output of the audio is 2V RMS. The minimum load impedance of the audio connector is 32Ω.
The BrightSign expansion module allows you to drive up to three sets of 5W headphones directly.
The audio connector has the following pinout:
- Tip: Left audio
- Ring: Right audio
- Sleeve: Ground for audio signal
VGA Output
The VGA output is a DE15 connector that is able to transmit RGB video. The following table illustrates the pinout of the DE15 VGA connector:
Pin | Description | Pin | Description |
|---|---|---|---|
1 | Red Analog video output | 2 | GREEN analog video output |
3 | Blue analog video output | 4 | NC |
5 | Digital ground | 6 | Analog ground |
7 | Analog ground | 8 | Analog ground |
9 | +5V DDC supply | 10 | Digital ground |
11 | NC | 12 | DDC SDA |
13 | HSYNC output | 14 | VSYNC output |
15 | DDC SCL | -- | -- |
HDMI Output
The HDMI® out connector is used to send digital video and audio to HDMI-enabled sink devices. This connector is compatible with HDMI 1.4 devices, capable of outputting a maximum video resolution of 1920x1080x60p.
The following table illustrates the pinout of the HDMI connector:
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 | HPD (Hot Plug Detect) | -- | |