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Hello,
I have a question about the TLV2548 chip, which behaves differently depending on whether it is operating at room temperature or at a low temperature.
We are using SPI communication between the TMS320F28377D and the TLV2548-EP chip. At room temperature (approximately 20°C), the ADC is sensing signals correctly. However, when the temperature drops to around -30°C, the TLV2548 chip stops sensing signals and produces the waveform shown below:
*communicating using the following timing
1. Normal operation - room temperature(20°C)
2. Malfunction - low temperature( -30°C)
When we operate the system from room temperature to low temperature, all other functions of the DSP and the device remain operational, except for the sensing function of the TLV2548. However, when we operate the system from low temperature to room temperature, the TLV2548 does not automatically recover from the malfunctioning state. We need to turn the power off and on again to make it operate normally.
We are currently testing three products, and all of them exhibit the same symptoms. Could you please help us identify what could be causing this issue?
Hi Tom,
What mode are you operating in?
-> operating in repeat sweep mode (mode 11)
What values are you writing to the configuration register?
-> 0xA860, It is configured as follows.
D11 : 1
D10 : 0
D09 : 0
D08,07 : 0, 0
D06,05 : 1, 1
D04, 03 : 0, 0
D02 : 0
D01, 00 : 0, 0
Can you also zoom in on the scope captures (room and cold) so that we can see the relationship of SCLK to SDI and SDO?
1) ROOM
2) COLD
Thank you for your response.
