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KLF7816_T2_02
Just a random board from a random DVB-T2 set top box.
Schematic for a slightly different version of it (seems to be called “KLF7816_T2_03”).
Specs
- SoC: MSD7816
- Demodulator: MSB1236C
- Tuner: NM120AA
- 64 MiB 16-bit DDR2 @ 1066 MHz
-
4 MiB SPI Flash
- Onboard front panel option:
- TM1650 for the 7-segment display and 3 buttons
- IR receiver
- Power LED
- Onboard USB port
IO pad usage
| Pin | Pad | Usage |
|---|---|---|
| 66 | TS1_CLK | Demod TS Clock |
| 67 | TS1_D7 | Demod TS Data7 |
| 68 | TS1_D6 | Demod TS Data6 |
| 69 | TS1_D5 | Demod TS Data5 |
| 70 | TS1_D4 | Demod TS Data4 / SCART aspect ratio |
| 71 | TS1_D3 | Demod TS Data3 |
| 72 | TS1_D2 | Demod TS Data2 |
| 73 | TS1_D1 | Demod TS Data1 |
| 74 | TS1_D0 | Demod TS Data0 |
| 75 | TS1_VLD | Demod TS Valid |
| 76 | TS1_SYNC | Demod TS Sync |
| 79 | S_GPIO3 | SCART switch |
| 80 | S_GPIO4 | SCART RGB/CVBS switch |
| 81 | I2CM0_SDA | Frontend SDA |
| 82 | I2CM0_SCL | Frontend SCL |
| 86 | EJ_TMS/GPIO | Audio output buffer enable |
| 87 | EJ_TDO/GPIO | Antenna power status/overload |
| 88 | SAR0 | Front panel Strobe |
| 89 | SAR1 | Front panel Data |
| 90 | SAR2 | Front panel Clock |
| 91 | SAR3 | Antenna power control |
| 96 | GPIO_PM9 | Frontend reset |
| 102 | GPIO_PM4 | System power control |
Note:
- Frontend means demod+tuner part.
Connectors
UART
| # | Label | Signal |
|---|---|---|
| 1 | GND | Ground |
| 2 | RX | UART RX (+ ISP SCL) |
| 3 | TX | UART TX (+ ISP SDA) |
Audio
| # | Label | Signal |
|---|---|---|
| 1 | L | Audio Left |
| 2 | GND | Ground |
| 3 | R | Audio Right |
SCART breakout
| # | Label | Signal |
|---|---|---|
| 1 | S_R | Audio Right |
| 2 | S_L | Audio Left |
| 3 | GND | Ground |
| 4 | S_Pb | RGB Blue |
| 5 | S_G | RGB Green |
| 6 | S_Pr | RGB Red |
| 7 | CVBS | CVBS |
| 8 | GND | Ground |
| 9 | RGB | SCART Fast switch |
| 10 | ACPECT | SCART Slow switch |
Front panel
| # | Label | Signal |
|---|---|---|
| 1 | DAT | Data |
| 2 | CLK | Clock |
| 3 | STB | Strobe |
| 4 | GND | Ground |
| 5 | IR | IR receiver |
| 6 | +5V | 5V power |
| 7 | LED | CEC LED |
USB
| # | Label | Signal |
|---|---|---|
| 1 | +5V | +5V VBUS |
| 2 | DM | USB D- |
| 3 | DP | USB D+ |
| 4 | GND | Ground |