USB 2828x
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An unbranded Video via USB device sold as HD AV Grabber. It appears to Windows as USB 2828x Device (for video) and USB 28285 Device (for audio).
Overview/Features
- USB ID eb1a:8285
- USB 2.0 interface
- Inputs: Composite, S-Video, Component (YPbPr), RCA stereo audio
Components Used
The board is labelled USB-EM2828X-C1-V1.3 and dated 2010.10.30.
EM28284 pin out
| Pin No. | Name | I/O | Function |
| 1 | VCCP33 | 3.3 V digital I / O power | |
| 2 | UTXD/P0_7 | DIO | UART transmit; GPIO0 [7] |
| 3 | UCLK | DIO | The connection test clock, the digital ground |
| 4 | P4_6 | DIO | GPIO4[6] |
| 5 | SSPND/P4_7 | DO | USP suspend; GPIO4 [7] output only |
| 6 | VCCK18 | 1.8V digital core power | |
| 7 | GNDK18 | 1.8V digital core ground | |
| 8 | RN | DI | Chip reset (active low) |
| 9 | GNDP33 | 3.3V digital I / O ground | |
| 10 | BCLK/P3_0 | DIO | Audio bit clock; GPIO3 [0] |
| 11 | VCCP33 | 3.3V digital I / O power | |
| 12 | SYNC/P3_1 | DIO | Audio sink; GPIO3 [1] |
| 13 | SDO/P3_2 | DIO | Audio serial output; GPIO3 [2] |
| 14 | SDI/P3_3 | DIO | Audio serial input; GPIO3 [3] |
| 15 | VCCP33 | 3.3V digital I / O power | |
| 16 | GNDAO33 | 3.3V audio output analog ground | |
| 17 | PMOUTN_L | AO | N differential left channel audio analog output |
| 18 | VCCAO33 | 3.3V analog audio output power | |
| 19 | PMOUTP_L | AO | P differential left channel audio analog output |
| 20 | GNDAO33 | 3.3V audio output analog ground | |
| 21 | PMOUTN_R | AO | N differential right channel audio analog output |
| 22 | VCCAO33 | 3.3V analog audio output power | |
| 23 | PMOUTP_R | AO | P differential right channel audio analog output |
| 24 | INN_L | AI | N differential left channel audio analog input |
| 25 | INP_L | AI | P differential left channel audio analog input |
| 26 | GNDAI33 | 3.3V audio input analog ground | |
| 27 | VCCAI33 | 3.3V audio input analog power supply | |
| 28 | GNDAI33 | 3.3V audio Substrate analog ground | |
| 29 | INP_R | AI | P differential right channel audio analog input |
| 30 | INN_R | AI | N differential right channel audio analog input |
| 31 | VREFMIC | AO | 1.6V microphone reference voltage output |
| 32 | GNDVA33 | 3.3V video AFE analog ground | |
| 33 | VCCVA33 | 3.3V video AFE analog power supply | |
| 34 | GNDVD18 | 1.8V video AFE digital ground | |
| 35 | VCCVD18 | 1.8V video AFE digital power | |
| 36 | GNDVD33 | 3.3V video AFE digital ground | |
| 37 | VCCVD33 | 3.3V video AFE digital power | |
| 38 | Y1 | AI | Components for Y, analog video input |
| 39 | ANY | AI | Video Y channel input reference |
| 40 | Y0 | AI | For composite, analog video input |
| 41 | PBI | AI | Components for Pb, analog video input |
| 42 | ANPB | AI | Video Pb channel input reference |
| 43 | PB0 | AI | For S-Video Y, analog video input |
| 44 | VREFN | AIO | Bypass input or decoupling the output of internal negative reference voltage |
| 45 | VCM | AIO | Bypass input or decoupling the output of the common mode voltage |
| 46 | VREFP | AIO | Bypass input or decoupling for the output of the internal positive reference voltage |
| 47 | PR0 | AI | For S-Video C, analog video input |
| 48 | ANPR | AI | Video Pr channel input reference |
| 49 | PR1 | AI | Components for Pr, analog video input |
| 50 | VCCVA33 | 3.3V video AFE analog power supply | |
| 51 | GNDVA33 | 3.3V video AFE analog ground | |
| 52 | SCL2/P3_ | DIO | Secondary command serial bus (I2C) clock; GPIO3 [4] |
| 53 | SDA2/P3_ | DIO | secondary command serial bus(I2C) data; GPIO3[5] |
| 54 | TSSDI/P1_ | DIO | Transport stream serial data; GPIO1 [3] |
| 55 | GNDP33 | 3.3V digital I / O ground | |
| 56 | TSVLD/P1 | DIO | Transport stream data valid; GPIO1 [2] |
| 57 | VCCP33 | 3.3V digital I / O power | |
| 58 | TSSYN/P1 | DIO | Transport stream sink; GPIO1 [1] |
| 59 | TSCLK/P1 | DIO | Transport stream clock; GPIO1 [0] |
| 60 | P4_4 | DIO | GPIO4[4] |
| 61 | GNDP33 | 3.3V digital I / O ground | |
| 62 | P2_7 | DIO | GPIO2[7] |
| 63 | P2_6 | DIO | GPIO2[6] |
| 64 | VCCK18 | 1.8V digital core power | |
| 65 | GNDK18 | 1.8V digital core ground | |
| 66 | P2_5 | DIO | GPIO2[5] |
| 67 | VCCP33 | 3.3V digital I / O power | |
| 68 | P2_4 | DIO | GPIO2[4] |
| 69 | P2_3 | DIO | GPIO2[3] |
| 70 | GNDP33 | 3.3V digital I / O ground | |
| 71 | P2_2 | DIO | GPIO2[2] |
| 72 | P2_1 | DIO | GPIO2[1] |
| 73 | P2_0 | DIO | GPIO2[0] |
| 74 | VCCP33 | 3.3V digital I / O power | |
| 75 | FID/P1_4 | DIO | Video field ID; GPIO1 [4] |
| 76 | VREF/P1_5 | DIO | Video vertical reference; GPIO1 [5] |
| 77 | GNDP33 | 3.3V digital I / O ground | |
| 78 | HREF/P1_ | DIO | Video horizontal reference; GPIO1 [6] |
| 79 | IR/P1_7 | DIO | Infrared receiver; snapshot button; GPIO1 [7] |
| 80 | P0_0 | DIO | GPIO0[0] |
| 81 | P0_1 | DIO | GPIO0[1] |
| 82 | P0_2 | DIO | GPIO0[2] |
| 83 | VCCP33 | 3.3V digital I / O power | |
| 84 | XCLK/P0_ | DIO | GPIO0[3] |
| 85 | GNDP33 | 3.3V digital I / O ground | |
| 86 | SCL1/P3_ | DIO | Primary command serial bus clock; GPIO3 [6] |
| 87 | SDA1/P3_ | DIO | Primary command serial bus data; GPIO3 [7] |
| 88 | P0_4 | DIO | GPIO0[4] |
| 89 | P0_5 | DIO | GPIO0[5] |
| 90 | URXD/P0_ | DIO | UART receive; GPIO0 [6] |
| 91 | GNDP33 | 3.3V digital I / O ground | |
| 92 | REXT | AI | 270 ~ 390Ω resistor in the connection to the ground |
| 93 | VCCU33 | 3.3V USB analog power supply | |
| 94 | DP | AIO | USB D + line |
| 95 | DM | AIO | USB D- line |
| 96 | GNDU33 | 3.3V USB analog ground | |
| 97 | XI | AI | 12MHz Crystal pad |
| 98 | XO | AO | 12MHz Crystal pad |
| 99 | GNDU33 | 3.3V USB analog ground | |
| 100 | VCCU18 | 1.8V USB digital power |
Identification
lsusb -v:
Bus 003 Device 005: ID eb1a:8285 eMPIA Technology, Inc.
Couldn't open device, some information will be missing
Device Descriptor:
bLength 18
bDescriptorType 1
bcdUSB 2.00
bDeviceClass 0 (Defined at Interface level)
bDeviceSubClass 0
bDeviceProtocol 0
bMaxPacketSize0 64
idVendor 0xeb1a eMPIA Technology, Inc.
idProduct 0x8285
bcdDevice 1.00
iManufacturer 0
iProduct 1
iSerial 2
bNumConfigurations 1
Configuration Descriptor:
bLength 9
bDescriptorType 2
wTotalLength 406
bNumInterfaces 3
bConfigurationValue 1
iConfiguration 0
bmAttributes 0x80
(Bus Powered)
MaxPower 500mA
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 0
bNumEndpoints 4
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 255
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0001 1x 1 bytes
bInterval 11
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0000 1x 0 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0000 1x 0 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x8a EP 10 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 1
bNumEndpoints 4
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 255
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0001 1x 1 bytes
bInterval 11
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0000 1x 0 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x03ac 1x 940 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x8a EP 10 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 2
bNumEndpoints 4
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 255
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0001 1x 1 bytes
bInterval 11
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0ad0 2x 720 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x03ac 1x 940 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x8a EP 10 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 3
bNumEndpoints 4
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 255
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0001 1x 1 bytes
bInterval 11
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x0c00 2x 1024 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x03ac 1x 940 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x8a EP 10 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 4
bNumEndpoints 4
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 255
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0001 1x 1 bytes
bInterval 11
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x1300 3x 768 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x03ac 1x 940 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x8a EP 10 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 5
bNumEndpoints 4
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 255
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0001 1x 1 bytes
bInterval 11
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x1380 3x 896 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x03ac 1x 940 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x8a EP 10 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 6
bNumEndpoints 4
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 255
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0001 1x 1 bytes
bInterval 11
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x13c0 3x 960 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x03ac 1x 940 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x8a EP 10 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 0
bAlternateSetting 7
bNumEndpoints 4
bInterfaceClass 255 Vendor Specific Class
bInterfaceSubClass 0
bInterfaceProtocol 255
iInterface 0
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x81 EP 1 IN
bmAttributes 3
Transfer Type Interrupt
Synch Type None
Usage Type Data
wMaxPacketSize 0x0001 1x 1 bytes
bInterval 11
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x82 EP 2 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x1400 3x 1024 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x84 EP 4 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x03ac 1x 940 bytes
bInterval 1
Endpoint Descriptor:
bLength 7
bDescriptorType 5
bEndpointAddress 0x8a EP 10 IN
bmAttributes 2
Transfer Type Bulk
Synch Type None
Usage Type Data
wMaxPacketSize 0x0200 1x 512 bytes
bInterval 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 1
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 1 Audio
bInterfaceSubClass 1 Control Device
bInterfaceProtocol 0
iInterface 0
AudioControl Interface Descriptor:
bLength 9
bDescriptorType 36
bDescriptorSubtype 1 (HEADER)
bcdADC 1.00
wTotalLength 40
bInCollection 1
baInterfaceNr( 0) 2
AudioControl Interface Descriptor:
bLength 12
bDescriptorType 36
bDescriptorSubtype 2 (INPUT_TERMINAL)
bTerminalID 1
wTerminalType 0x0201 Microphone
bAssocTerminal 0
bNrChannels 2
wChannelConfig 0x0000
iChannelNames 0
iTerminal 0
AudioControl Interface Descriptor:
bLength 10
bDescriptorType 36
bDescriptorSubtype 6 (FEATURE_UNIT)
bUnitID 2
bSourceID 1
bControlSize 1
bmaControls( 0) 0x03
Mute Control
Volume Control
bmaControls( 1) 0x00
bmaControls( 2) 0x00
iFeature 0
AudioControl Interface Descriptor:
bLength 9
bDescriptorType 36
bDescriptorSubtype 3 (OUTPUT_TERMINAL)
bTerminalID 3
wTerminalType 0x0101 USB Streaming
bAssocTerminal 0
bSourceID 2
iTerminal 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 0
bNumEndpoints 0
bInterfaceClass 1 Audio
bInterfaceSubClass 2 Streaming
bInterfaceProtocol 0
iInterface 0
Interface Descriptor:
bLength 9
bDescriptorType 4
bInterfaceNumber 2
bAlternateSetting 1
bNumEndpoints 1
bInterfaceClass 1 Audio
bInterfaceSubClass 2 Streaming
bInterfaceProtocol 0
iInterface 0
AudioStreaming Interface Descriptor:
bLength 7
bDescriptorType 36
bDescriptorSubtype 1 (AS_GENERAL)
bTerminalLink 3
bDelay 1 frames
wFormatTag 1 PCM
AudioStreaming Interface Descriptor:
bLength 11
bDescriptorType 36
bDescriptorSubtype 2 (FORMAT_TYPE)
bFormatType 1 (FORMAT_TYPE_I)
bNrChannels 2
bSubframeSize 2
bBitResolution 16
bSamFreqType 1 Discrete
tSamFreq[ 0] 48000
Endpoint Descriptor:
bLength 9
bDescriptorType 5
bEndpointAddress 0x83 EP 3 IN
bmAttributes 1
Transfer Type Isochronous
Synch Type None
Usage Type Data
wMaxPacketSize 0x00c4 1x 196 bytes
bInterval 4
bRefresh 0
bSynchAddress 0
AudioControl Endpoint Descriptor:
bLength 7
bDescriptorType 37
bDescriptorSubtype 1 (EP_GENERAL)
bmAttributes 0x00
bLockDelayUnits 0 Undefined
wLockDelay 0 Undefined
Making it Work
Only audio is working with snd-usb-audio.
Sample Kernel Output
[ 47.006274] usb 3-2.4.2: new high-speed USB device number 5 using xhci_hcd [ 47.096666] usb 3-2.4.2: New USB device found, idVendor=eb1a, idProduct=8285 [ 47.096671] usb 3-2.4.2: New USB device strings: Mfr=0, Product=1, SerialNumber=2 [ 47.096673] usb 3-2.4.2: Product: USB 28285 Device [ 47.096675] usb 3-2.4.2: SerialNumber: 0 [ 47.110857] usbcore: registered new interface driver snd-usb-audio
See also
- Honestech Vidbox NW07 – also uses the EM28284 chip