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

Driver and more

There's an open source driver that's included in kernel 3.19. 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.


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