PPD (Packet Property Data)

Available 0 ~ 15 for Stream Mode.

PC (Packet Count)

+1 for every one packet transmission and start 0 again after the maximum value.
By using PC, it is necessarily used to identify the data transmitted to PCD every packet.
The maximum of PC value gets different value according to PCD Type value. If PCDT is 0, PC maximum is 31.

CRD (Command Response Data)

If the device receives the command from the other device, CRD value is reversed.
Usage – If CRD value is 1 before transmitting the order from host and the value is the same after transmitting,
the order transmission is failed. If CRD value is changed, it means the device receives the order from host

PUD 0, PUD 1, PUD 2 (Packet Unit Data)

Allocated data is different for each product. Mainly, information data to transmit at high speed is allocated.

PCDT (Packet Cyclic Data Type)

PC maximum depends on this value and data transmitted to packet cyclic data depends on PCDT value. PCDT value is always 0 for the first stage(device power ON) and though PCD mode value is changed into different value like 1,2,3.. on the situation, it is changed into 0 automatically by completing data transmission of the mode one time.

 PCDT  PC (Packet Count) Maximum  Data
 0  31  Exclusive data for LXSDF T2A and general data.
 1  depends on each product.
 2  depends on each product.
 3  depends on each product.
 4  depends on each product.
 5  depends on each product.
 6  depends on each product.
 7  depends on each product.


LXSDF T2A PCD Designated Data for PCDT 0.

The section from PC 0 to 19 is for transmitting product’s specialized data and the section from PC 20 to PC 31 is for system designated data. The system exclusive data is explained as below table.

 Table. PCD Designated Data of PCDT 0
 PCD[PC]  Item  Description
 PCD[31]  Com port search information  fixed value 109. Information for searching device using LXSDF T2A.
 PCD[30]  LXDeviceID  Allocated value between 1 and 255. Unique ID for identifying the device.
 PCD[29]  ComFirmInfo1   Firmware ID and version for processor 1.
 PCD[28]  Number of channel  Number of channel from stream area of packet.
 PCD[27]  Number of samples  Number of samples from stream area of packet.
 PCD[26]  ComPath   Communication physical path.
 PCD[25]  ComFirmInfo2    Firmware ID and version for processor 2.
 PCD[24]  ComFirmInfo3    Firmware ID and version for processor 3.
 PCD[23]  –  – reserved
 PCD[22]  –  – reserved
 PCD[21]  –  – reserved
 PCD[20]  –  – reserved


ComPath is used for mark to show what physical path to transmit data. It is possible to transmit more than two communication path in one device. The host received the data refers to Compath value to check the communication path.

 ComPath Value  Communication Path
 0  UART
 2  Bluetooth SPP(Serial Peripheral Profile)
 3  Bluetooth Low Energy SPS