TRF372017: About register & GUI questions

Ryan Lee TW

Part Number: TRF372017
Other Parts Discussed in Thread: LMX8410L,

Hi Teams,

I am studying TRF372017 and LMX8410L to build a transciever.

There are several questions as below which I can't find the answers from datasheets or relative documents, or just I missed.

Q1. How to export register list from GUI for TRF372017?

Q2. What is the sequence of registers? (Reg. 5 -> Reg.4 -> Reg.3 -> Reg.2 -> Reg.1)

Q3. There are 7 Registers, but why only capture 5 Register from LA?

Q4. As datasheet mention, CSB needs pulling high before write register and do it again after finish writing.

So there should be twice pull high for CSB, but only capture the "finish" one from EVM.

The question is : Should I follow the rule of datasheet or the action of EVM?

Thanks.

over 2 years ago

0 Jane Pieh over 2 years ago

Prodigy 30 points

Hi Teams:

We need to confirm it, need to development driver for our module. Thank you.

B.R. Jane

0 Kang Hsia over 2 years ago

TI__Guru 65864 points

Hi,

I will take a look and get back to you

0 Kang Hsia over 2 years ago in reply to Kang Hsia

TI__Guru 65864 points

Hi,

FYI, please refer to the following E2E as a reference:

https://e2e.ti.com/support/rf-microwave-group/rf-microwave/f/rf-microwave-forum/967829/trf372017-order-of-programming-registers-and-optimal-register-values-for-2450-mhz-modulated-output/3576421?tisearch=e2e-sitesearch&keymatch=trf372017#3576421

Ryan Lee TW said:
Q1. How to export register list from GUI for TRF372017?

you may press save register to file button on the GUI.

Ryan Lee TW said:
Q2. What is the sequence of registers? (Reg. 5 -> Reg.4 -> Reg.3 -> Reg.2 -> Reg.1)

There is no specific sequence to the register writes to the TRF372017. Please be sure to trigger EN_CAL at the end of the process. See previous E2E post for detail on the programming sequence

Ryan Lee TW said:
There are 7 Registers, but why only capture 5 Register from LA?

you should see 7 registers being exercisable by the GUI. You can try to change the values of register 6 and 7 and observe the output. Register 6 and 7 are trim adjustments for DC correction and or performance, therefore, they are not written all the time.

Ryan Lee TW said:
Q4. As datasheet mention, CSB needs pulling high before write register and do it again after finish writing.

So there should be twice pull high for CSB, but only capture the "finish" one from EVM.

The LE in the datasheet is to latch in the previous SPI write. Therefore, you should follow the datasheet if you are doing continuous writes. See datasheet instruction below

"The LE is asynchronous to the CLOCK and at its rising edge the data in the shift register gets loaded onto the selected internal register"

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TRF372017: About register & GUI questions