BC127 Sends Greeting Forever

IoT Modules WiFi and Bluetooth Modules
1

We have integrated the BC127 into an embedded system with UART connection.

Problem: the module sends this message forever…
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BlueCreation Copyright 2013
Melody Audio V5.0 RC11
Ready
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The module is not in reset, and vregen is true. We checked timing on these signals and found we met the required timings.

We cannot send any messages to the device such as STATUS or SOFT_RESET. Nothing gets it out of this endless mode.

We toggled reset, using long reset timings, to no avail.

We can’t update the firmware because the device is in this endless loop…

Any ideas what is wrong?

2

@dmclane14,

Is this on a diskit or on one of your application board? It is very odd I have never seen that before.

Regards

Matt

3

Fixed this problem. This behavior occurs if the VREGEN pin is held high. In fact this happens if I follow the power up sequence shown in the datasheet. You might want to fix that to save others this problem.

4

@dmclane14,

I have pushed it back, hopefully it will appear in the PTS shortly as we are updating it since the unit is BT5 ‘compliant’ with the 7.x firmware.

Regards

Matt

5

I am running into this same problem. However, pulling VREGEN low does not fix the problem. Is there anything else that you have done?
@mlw that you know of, does this problem only occur on BC127s with V5.0?