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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 3.3V 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. The 3.3V output is polyfuse-protected and can source up to 500mA.
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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 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. |
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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 XT243 and XT1143:
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Pin | Function | Pin | Function |
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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 |
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The following schematic illustrates the pinout of the GPIO connector:
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pin | Description | pin | Description |
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1 | VBUS | 2 | D- |
3 | D+ | 4 | Ground |
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The following table illustrates the pinout of the USB 2.0 Type C host port:
pin | Signal Name | Description | Mating Sequence | pin | Signal Name | Description | Mating Sequence | ||||||
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A1 | GND | Ground return | First | B12 | GND | Ground return | First | ||||||
A2 |
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A3 |
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A4 | VBUS | Bus power | First | B9 | VBUS | Bus power | First | ||||||
A5 | CC1 | Configuration channel | Second | B8 |
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A6 | Dp1 | Positive half of USB 2.0 differential pair – position 1 | Second | B7 | Dn2 | Negative half of USB 2.0 differential pair – position 2 | Second | ||||||
A7 | Dn1 | Negative half of USB 2.0 differential pair – position 1 | Second | B6 | Dp2 | Positive half of USB 2.0 differential pair – position 2 | Second | ||||||
A8 |
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| B5 | CC2 | Configuration channel | Second | ||||||
A9 | VBUS | Bus power | First | B4 | VBUS | Bus power | First | ||||||
A10 |
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A11 |
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A12 | GND | Ground return | First | B1 | GND | Ground return | First |
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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:
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The sleeve is used as a ground during input operations. |
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 2.0 devices, capable of outputting a maximum video resolution of 4096x2160x60p.
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pin | Description | pin | Description | |
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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) | -- |
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HDMI Input
The HDMI-in connector is used to receive digital video and audio from HDMI-enabled source devices. This connector is compatible with HDMI 2.0 devices and capable of accepting a maximum video resolution of 4096x2160x60p. The signaling also conforms with DVI 1.0, HDMI 1.4, and HDCP 1.4 standards.
The HDMI signaling has CEC (but no ARC or HEC) functionality. The CEC channel is electrically coupled to the corresponding signal on the HDMI output, and the CEC commands will pass through the player even when it does not have power.