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CC2564MODN: Wideband Audio Setup between CC2564MODN and WL1831

Part Number: CC2564MODN
Other Parts Discussed in Thread: WL1831, WL1835, CC2564C

Hello, we are using the CC2564MODN and WL1831, which are connected via PCM.  A headset is connected to the WL1831 via Bluetooth and a mobile phone is connected to the CC2564MODN via Bluetooth.  We are trying to set up the chips to enable the use of wideband audio.

We've been referencing the document at and are still having difficulties.  We would appreciate any pointers you could provide.  I've copied below what we've tried so far.

Thanks and regards,


1- we disable le using opcode 0xFD5B for both CC256X and wl1835
2- disable ant  opcode 0xFDD0 for both units
3- setup voice settings to transparent (0x0063) using opcode 0x0C26 for both units
4- setup the clock for both units with opcode oxFD06  as follow:
   CC256X set as master PCM: HCI_VS_Write_CODEC_Config 0xFD06, 3072, 0x00, 16000, 0x0060, 1, 0x00, 0x00, 16, 1, 0x01, 16, 1, 0x00, 0x00, 16, 17, 0x01, 16, 17, 0x00, 0x00
   WL1835 set as slave PCM: HCI_VS_Write_CODEC_Config 0xFD06, 3072, 00x01, 16000, 0x0060, 0, 0x00, 0x00, 16, 1, 0x01, 16, 1, 0x00, 0x00, 16, 17, 0x01, 16, 17, 0x00, 0x00
5- I set on both units HCI_Vs_Wbs_Associate 0xFD78, 0x1
6- on both units I run HCI_Setup_Synchronous_Connection (opcode 0x0428) with the following settings:
   0x1F40, 0x1F40 for transmit and receive bandwidth
   0xE for latency
   0x0063 for voice settings
   retransmission effort 0x02
   packet type 0x03C8
this did not work knowing that the same hardware when setup to run CVSD codec work without an issue