TechnoTrend TT-budget CT2-4500 CI

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A DVB-T/DVB-T2 or DVB-C PCIe card from TechnoTrend with integrated CI Slot. The card seems to be a OEM version of DVBSky T980C.


  • CI-Slot
  • Belling Lee Connector (Cable or Antenna)
  • PCIe x1
  • Low power

Technical Details

Original Version

Version 2.0

  • PCIe Bridge : Conexant PCIe A/V Decoder CX23885-15Z
  • DVB-T2/C demodulator : Si2168-B40
  • DVB-T2/C tuner : Si2157-A30
  • CI chip: CICORE 1.0 (same as CIMaX SP2HF)
  • PCI ID 13c2:3013

Driver and more

There's an open source driver that's included in kernel 3.19. The same driver works for both version 1.0 and 2.0. It can be built for older kernels using the media_build. Firmware is required for Si2168 demod and Si2158 tuner. See the details from the DVBSky T980C page.

Note! The CI handling is broken in the driver for kernels 4.0-4.5. This is fixed in the current media_tree and in kernels starting from 4.6.


lspci -vvvnn

06:00.0 Multimedia video controller [0400]: Conexant Systems, Inc. CX23885 PCI Video and Audio Decoder [14f1:8852] (rev 04)
        Subsystem: Technotrend Systemtechnik GmbH Device [13c2:3013]
        Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx-
        Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
        Latency: 0, Cache Line Size: 64 bytes
        Interrupt: pin A routed to IRQ 18
        Region 0: Memory at f7200000 (64-bit, non-prefetchable) [size=2M]
        Capabilities: [40] Express (v1) Endpoint, MSI 00
                DevCap: MaxPayload 128 bytes, PhantFunc 0, Latency L0s <64ns, L1 <1us
                        ExtTag- AttnBtn- AttnInd- PwrInd- RBE- FLReset-
                DevCtl: Report errors: Correctable- Non-Fatal- Fatal- Unsupported-
                        RlxdOrd- ExtTag- PhantFunc- AuxPwr- NoSnoop+
                        MaxPayload 128 bytes, MaxReadReq 512 bytes
                DevSta: CorrErr- UncorrErr- FatalErr- UnsuppReq- AuxPwr- TransPend-
                LnkCap: Port #0, Speed 2.5GT/s, Width x1, ASPM L0s L1, Exit Latency L0s <2us, L1 <4us
                        ClockPM- Surprise- LLActRep- BwNot-
                LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- CommClk+
                        ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
                LnkSta: Speed 2.5GT/s, Width x1, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt-
        Capabilities: [80] Power Management version 2
                Flags: PMEClk- DSI+ D1+ D2+ AuxCurrent=0mA PME(D0+,D1+,D2+,D3hot+,D3cold-)
                Status: D0 NoSoftRst- PME-Enable- DSel=0 DScale=0 PME-
        Capabilities: [90] Vital Product Data
                Product Name: "
        Capabilities: [100 v1] Advanced Error Reporting
                UESta:  DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-
                UEMsk:  DLP- SDES- TLP- FCP- CmpltTO- CmpltAbrt- UnxCmplt- RxOF- MalfTLP- ECRC- UnsupReq- ACSViol-
                UESvrt: DLP+ SDES- TLP- FCP+ CmpltTO- CmpltAbrt- UnxCmplt- RxOF+ MalfTLP+ ECRC- UnsupReq- ACSViol-
                CESta:  RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr-
                CEMsk:  RxErr- BadTLP- BadDLLP- Rollover- Timeout- NonFatalErr-
                AERCap: First Error Pointer: 00, GenCap- CGenEn- ChkCap- ChkEn-
        Capabilities: [200 v1] Virtual Channel
                Caps:   LPEVC=0 RefClk=100ns PATEntryBits=1
                Arb:    Fixed+ WRR32+ WRR64+ WRR128-
                Ctrl:   ArbSelect=WRR64
                Status: InProgress-
                Port Arbitration Table [240] <?>
                VC0:    Caps:   PATOffset=00 MaxTimeSlots=1 RejSnoopTrans-
                        Arb:    Fixed- WRR32- WRR64- WRR128- TWRR128- WRR256-
                        Ctrl:   Enable+ ID=0 ArbSelect=Fixed TC/VC=01
                        Status: NegoPending- InProgress-
        Kernel driver in use: cx23885

Closed Source Driver - Making it Work

Linux Mint 17:
Install libc6-dev and procps.
Download driver and follow manual.
Proven with kernel:

uname -a
Linux main-17 3.13.0-24-generic #47-Ubuntu SMP Fri May 2 23:30:00 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux  


No action needed.

Sample Kernel Output

dmesg (dvb-t?)

[   20.249360] cx23885 driver version 0.0.4 loaded
[   20.249472] CORE cx23885[0]: subsystem: 13c2:3013, board: Technotrend TT-budget CT2-4500 CI [card=48,autodetected]
[   20.599261] cx25840 4-0044: cx23885 A/V decoder found @ 0x88 (cx23885[0])
[   21.441703] cx25840 4-0044: loaded v4l-cx23885-avcore-01.fw firmware (16382 bytes)
[   21.456930] cx23885_dvb_register() allocating 1 frontend(s)
[   21.456933] cx23885[0]: cx23885 based dvb card
[   21.458081] i2c i2c-3: Added multiplexed i2c bus 5
[   21.458088] si2168 3-0064: Silicon Labs Si2168 successfully attached
[   21.460274] si2157 5-0060: Silicon Labs Si2157/Si2158 successfully attached
[   21.460280] DVB: registering new adapter (cx23885[0])
[   21.460284] cx23885 0000:07:00.0: DVB: registering adapter 1 frontend 0 (Silicon Labs Si2168)...
[   21.512295] sp2 2-0040: CIMaX SP2 successfully attached
[   21.538835] Technotrend TT-budget CT2-4500 CI MAC address: bc:ea:2b:45:01:cb
[   21.538839] cx23885_dev_checkrevision() Hardware revision = 0xa5
[   21.538843] cx23885[0]/0: found at 0000:07:00.0, rev: 4, irq: 47, latency: 0, mmio: 0xfbc00000

dmesg (dvb-c)

[    1.921940] cx23885 driver version 0.0.3 loaded
[    1.922277] CORE cx23885[0]: subsystem: 13c2:3013, board: TT-budget CT2-4500 CI [card=51,autodetected]
[    2.157316] cx25840 14-0044: cx23885 A/V decoder found @ 0x88 (cx23885[0])
[    2.801189] cx25840 14-0044: loaded v4l-cx23885-avcore-01.fw firmware (16382 bytes)
[    2.818193] cx23885_dvb_register() allocating 1 frontend(s)
[    2.818196] cx23885[0]: cx23885 based dvb card
[    2.819956] DVB: registering new adapter (cx23885[0])
[    2.819960] cx23885 0000:06:00.0: DVB: registering adapter 0 frontend 0 (Sit2 DVB-T2/C)...
[    2.824792] cx23885_dev_checkrevision() Hardware revision = 0xa5
[    2.824798] cx23885[0]/0: found at 0000:06:00.0, rev: 4, irq: 18, latency: 0, mmio: 0xf7200000
[    2.850045] Registered IR keymap rc-tt-1500
[    2.850122] input: cx23885 IR (TT-budget CT2-4500 CI) as /devices/pci0000:00/0000:00:1c.6/0000:06:00.0/rc/rc0/input23
[    2.853790] rc0: cx23885 IR (TT-budget CT2-4500 CI) as /devices/pci0000:00/0000:00:1c.6/0000:06:00.0/rc/rc0
[    2.858816] input: MCE IR Keyboard/Mouse (cx23885) as /devices/virtual/input/input24
[    2.858855] IR MCE Keyboard/mouse protocol handler initialized
[    2.861353] lirc_dev: IR Remote Control driver registered, major 249 
[    2.861576] rc rc0: lirc_dev: driver ir-lirc-codec (cx23885) registered at minor = 0
[    2.861578] IR LIRC bridge handler initialized

Remote Control Support

Remote control works out of box with binary driver

External Links