DA14706 reporting an incompatible SWC level of 0

Question

I am brining up a prototype board with a DA14706 A1 cpu. Serial and jtag loading to qspi both fail after the initial bootloader is loaded. Loading an example application to RAM and debugging it results in an error in pre startup here: bool hw_sys_is_compatible_chip(void)
{
#ifndef POPULATE_DEVICE_INFO
 return true;
#else
 if (hw_sys_device_info_check(DEVICE_CHIP_ID_MASK, DEVICE_CHIP_ID_2798)) {
 if (hw_sys_device_info_check(DEVICE_REVISION_MASK, DEVICE_REV_A) &&
 hw_sys_device_info_check(DEVICE_SWC_MASK, DEVICE_SWC_1)) {
 return true;
 }
 } else if (hw_sys_device_info_check(DEVICE_CHIP_ID_MASK, DEVICE_CHIP_ID_3107)) {
 if (hw_sys_device_info_check(DEVICE_REVISION_MASK, DEVICE_REV_A) &&
 hw_sys_device_info_check(DEVICE_SWC_MASK, DEVICE_SWC_0)) {
 return true;
 }
 }

 return false;
#endif
} 
 This is called from SystemInitPre() When this is executed the chip id evaluates to 2798 and the revision mask to A. However, the SWC evaluates to SWC_0 which causes the assertion to fail and the device to hang. Forcing it to return true always causes it to hang later on in an NMI. I am at a loss.

PM_Renesas · Accepted Answer

Dear Dovoto, 
 
 We would like to get the message clear and to avoid any misunderstanding on this topic. 
 The DA14706 device is dual sourced from TSMC and Global Foundries. The SDK is supporting both variants and will continue to have this support in the future. 
 
 The material that you have used is TSMC (D2798), SWC 0x0 is pre-production material and not qualified for production. As far as we know this version of the hardware has not been released through the official Renesas nor Dialog official sales channels. Datasheets with revisions below 3.0 were preliminary and have not been made public. 
 
 We regret the confusion created in this thread and hope we can continue supporting you on the officially released Renesas Software and Hardware. 
 
 Best regards, 
 PM_Renesas

dovoto · Answer

I have solved the issue. The first is a bug in the sdk. The compatibility check incorrectly rejects a SWC_0 when the chip ID is 2798. Correcting this allows the device to execute. I actually fixed this over a week ago but there is another issue in the SDK in that if you have qspi flash enabled but not connected it just spins in a config loop (instead of timing out and reporting an error).

If there is a repository for the SDK i can do a PR.

OV_Renesas · Answer

Hi There, Thank you for the reply. Glad you were able to solve this issue on your side. After further checking I have found out that I have shared wrong information. We checked the older revisions of the Datasheet and found out: All TSMC chip versions are 'A' as far as we can see (DS Rev 1.2 to DS Rev 3.0). But the SWC code has changed from 0x0 (DS Rev 1.2) to 0x01 (DS Rev 2.0 and higher) From the screenshot below, it appears that the TSMC (D2798) SWC =0x0 indeed is not supported anymore by the SDK . Only SWC = 0x01 is supported by the SDK. It has changed somewhere mid 2021 . Looking at the chip's Datecode (2104), it probably has SWC = 0x0. The other available SDK (SDK-10.2.4.44) on the Renesas site also doesn't support TSMC SWC 0x0. 
 Please check the following REG contents of the used chip: With your workaround (not checking the SWC code) it seems to work, but we have not tested/validated the SDK with this chip variant. So, it cannot be supported by our side. Please make sure that any other devices you will create with the DA14706 will not have the same chip variant. If you have ordered a lot of DA14706 devices with the TSMC (D2798) chip variant, please contact your local distributor or sales spokesman. Please refer here: Sales & Distributor Directory | Renesas Apologies for any incovience. Best Regards, OV_Renesas

OV_Renesas · Answer

Hi There, Thank you for the reply. We are sorry for any inconvenience on your side. The DA14706 chip variant TSMC (D2798) SWC =0x0 is NOT supported by the current SDK (or the previous one). Only the DA14706 chip variant GF D3107 is currently supported by the SDK. Any date range after mid 2021, should have the GF silicon variants. 
 We believe that this was a miscommunication issue on the distributor or on our part to not have the TSMC (D2798) chip variants removed. Please contact your local distributor or your local sales person, so you can return the chip variants of TSMC (D2798) and replace them with the GF D3107 variant. 
 dovoto said: " we have not tested/validated the SDK with this chip variant. So, it cannot be supported by our side." I am not sure this is the answer you want to put on a public forum. 
 Yes, this statement on its own could be misinterpreted. The whole answer is that this chip variant should have been removed from the market way before this SDK was released. This is the reason, why we have not tested/validated the existing SDK with this chip variant. 
 We are aware that you have "solved" this issue on your side and it seems to work, but we cannot guarantee if this is going to keep working. This is why we ask you contact your local distributor or Renesas Sales to return the old chip variants. 
 Best Regards, OV_Renesas

DA14706 reporting an incompatible SWC level of 0

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