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Figure 5.2.1: LED board connector
Pin2 and pin3 carry the control signals for the LED. Pin4 carries the infra-red signal to the microcontroller.
Pin5 is used to power up the LED board.
5.3
DVB-T module board
DVB-T module board (tdm1300) is used to receive digital terrestrial broadcast signals. Three cables are
used to connect 17mb27 and tdm1300: power, data, and IF.
12V (500mA) is sent to tdm1300 by power cable:
Figure 5.3.1: DVB-T module card power connection on 17mb27
Analog RGB(YPbPr), CVBS, stereo audio, tuner control (SCL, SDA, AGC), and three GPIO port outputs
of tdm1300, together with UART ports (TV_RXD, TV_TXD, IRQ) are carried by data cable.
8
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