Quantek QT1010

The Quantek QT1010 is a wideband tuner chip.

Features

• 48MHz-860MHz frequency range (bands I, II, III, IV).
• 30MHz-60MHz IF output range.
• NTSC, PAL, SECAM broadcast formats.
• DVB-C, DVB-T, ATSC and ISDB-T support.

External Links

QT1010 Product page at qantek-inc.com

Description of how to program the chip

Tuner context

The tuner has a global context for some variables. They can be used anytime in the init and set methods.

• reg31
• reg32
• reg34
• reg34_1
• reg34_2
• reg34_3
• reg34_4
• reg34_5
• reg34_6
• reg34_7
• reg34_8
• reg37
• reg38

Tuner Init

This method has no arguments.

• write 0x80 to tuner register 1
• write 0x84 to tuner register 13
• write 0xB4 to tuner register 14* (or 0xB7 might work better on some older devices)
• write 0x23 to tuner register 42
• write 0xDC to tuner register 44
• write 0x40 to tuner register 37
• write 0x00 to tuner register 30
• write 0x81 to tuner register 30

• loop 30 times
  • read tuner register 37 into reg37
  • if reg37 bit 8 is set
    • break out of loop

• read tuner register 37 into reg37
• write 0x00 to tuner register 30
• write 0x23 to tuner register 42
• write 0x70 to tuner register 43
• write 0x08 to tuner register 38
• write 0x00 to tuner register 30
• write 0x82 to tuner register 30

• loop 30 times
  • read tuner register 38 into reg38
  • if reg38 bit 5 is set
    • break out of loop

• read tuner register 38 into reg38
• write 0x00 to tuner register 30
• write 0x14 to tuner register 5
• write 0x44 to tuner register 6
• write 0x28 to tuner register 7
• write 0x0B to tuner register 8
• write 0xFD to tuner register 17*
• write 0x80 to tuner register 1
• write 0x80 to tuner register 1
• write 0x80 to tuner register 1
• write 0x80 to tuner register 1
• write 0x80 to tuner register 1
• write 0x80 to tuner register 1
• write 0x80 to tuner register 1
• write 0x80 to tuner register 1
• write 0x80 to tuner register 1
• write 0x80 to tuner register 1
• write 0x0D to tuner register 34
• write 0x00 to tuner register 30
• write 0xD0 to tuner register 30

• loop 30 times
  • read tuner register 34
  • if register 34 bit 6 is set
    • break out of loop

• write 0x00 to tuner register 30
• write 0x40 to tuner register 6
• write 0xF0 to tuner register 22
• write 0x38 to tuner register 2
• write 0x19 to tuner register 3
• write 0x20 to tuner register 31
• write 0xE0 to tuner register 32
• write 0x00 to tuner register 30
• write 0x84 to tuner register 30

• loop 30 times
  • read tuner register 31 into reg31
  • if register 31 bit 7 is set
    • break out of loop

• read tuner register 31 into reg31
• read tuner register 32 into reg32
• write 0x00 to tuner register 30
• write 0x3F to tuner register 2
• write 0x53 to tuner register 33
• read tuner register 33 into reg33
• write 0xFD to tuner register 17*
• write 0x34 to tuner register 5
• write 0x44 to tuner register 6
• write 0x31 to tuner register 7
• write 0x08 to tuner register 8
• write 0xD0 to tuner register 34
• write 0x00 to tuner register 30
• write 0xD0 to tuner register 30

• loop 30 times
  • read tuner register 34
  • if register 34 bit 6 is set
    • break out of loop

• write 0x00 to tuner register 30
• read tuner register 34 into reg34_1
• write 0x32 to tuner register 7
• write 0xD0 to tuner register 34
• write 0x00 to tuner register 30
• write 0xD0 to tuner register 30

• loop 30 times
  • read tuner register 34
  • if register 34 bit 6 is set
    • break out of loop

• write 0x00 to tuner register 30
• read tuner register 34 into reg34_2
• write 0x33 to tuner register 7
• write 0xD0 to tuner register 34
• write 0x00 to tuner register 30
• write 0xD0 to tuner register 30

• loop 30 times
  • read tuner register 34
  • if register 34 bit 6 is set
    • break out of loop

• write 0x00 to tuner register 30
• read tuner register 34 into reg34_3
• write 0x34 to tuner register 7
• write 0xD0 to tuner register 34
• write 0x00 to tuner register 30
• write 0xD0 to tuner register 30

• loop 30 times
  • read tuner register 34
  • if register 34 bit 6 is set
    • break out of loop

• write 0x00 to tuner register 30
• read tuner register 34 into reg34_4
• write 0x35 to tuner register 7
• write 0xD0 to tuner register 34
• write 0x00 to tuner register 30
• write 0xD0 to tuner register 30

• loop 30 times
  • read tuner register 34
  • if register 34 bit 6 is set
    • break out of loop

• write 0x00 to tuner register 30
• read tuner register 34 into reg34_5
• write 0x36 to tuner register 7
• write 0xD0 to tuner register 34
• write 0x00 to tuner register 30
• write 0xD0 to tuner register 30

• loop 30 times
  • read tuner register 34
  • if register 34 bit 6 is set
    • break out of loop

• write 0x00 to tuner register 30
• read tuner register 34 into reg34_6
• write 0x37 to tuner register 7
• write 0xD0 to tuner register 34
• write 0x00 to tuner register 30
• write 0xD0 to tuner register 30

• loop 30 times
  • read tuner register 34
  • if register 34 bit 6 is set
    • break out of loop

• write 0x00 to tuner register 30
• read tuner register 34 into reg34_7
• write 0x38 to tuner register 7
• write 0xD0 to tuner register 34
• write 0x00 to tuner register 30
• write 0xD0 to tuner register 30

• loop 30 times
  • read tuner register 34
  • if register 34 bit 6 is set
    • break out of loop

• write 0x00 to tuner register 30
• read tuner register 34 into reg34_8
• write 0x39 to tuner register 7
• write 0xD0 to tuner register 34
• write 0x00 to tuner register 30
• write 0xD0 to tuner register 30

• loop 30 times
  • read tuner register 34
  • if register 34 bit 6 is set
    • break out of loop

• write 0xD0 to tuner register 30
• read tuner register 34 into reg34

Tuner set frequency

The frequency set method has one sub-method and one subsub-method.

set_frequency

This method has the frequency argument, called freq and in kHz.

• call set_parameters with freq and try_count equal to 0
• if reg35 equal to 0xE0
  • call set_parameters with freq and try_count equal to 2
• if reg35 equal to 0xFF
  • call set_parameters with freq and try_count equal to 3
• if reg34 equal to 0xFF
  • call set_parameters with freq and try_count equal to 1

set_parameters

arguments freq and try_count

• call calculate_parameters with freq and try_count
• write 0x80 to tuner register 1
• write 0x3F to tuner register 2

• if try_count is equal to 1
  • if reg5 is less then 0x74
    • set reg5_1 to reg_5 plus 0x20

• write reg5_1 to tuner register 5
• write 0x44 to tuner register 6
• write freq_slot2 to tuner register 7
• write freq_slot1 to tuner register 8
• write freq_slot4 to tuner register 9
• write freq_slot5 to tuner register 10
• write freq_slot6 to tuner register 11
• write 0xE1 to tuner register 12
• write freq_slot7 to tuner register 26
• write 0x00 to tuner register 27
• write freq_slot8 to tuner register 28
• write 0xFD to tuner register 17*