topic Re: PF5200 TBBEN mode in Power Management

PF5200 TBBEN mode

satheesh_mb — Tue, 20 Apr 2021 05:14:45 GMT

I need to program the PMIC PF5024(EVAL board) without using NXP GUI.

The procedure mentioned for TBBEN mode :

J34 switch to be between 2-3 (Shorted to Ground)
J40 between 2-3 it has to be high
j39 between 1-2 (gnd)
Configure the register values
Connect the J40 between 1-2, so it will be tied to Ground
Now the values should be configured

How we tried to achieve above sequence :

J34 switch to be between 2-3 (Shorted to Ground)
J40 kept open and Pin2 of J40 Tied to a 1.5V power supply
j39 between 1-2 (gnd)
Configure the register values
- (When I tried reading back the OTP registers , it reads back zero always.)
J40 kept open and Pin2 of J40 Tied to GND (We done this via a 1K resistance)
After this we didn't see any change in BUCK voltages
- (The I2C read fails and it returns NACK always )

So I need know how to verify following steps:

1. Read back OTP registers writes in TBBEN mode
2. Is there any sequence missing to perform TBB mode?

Any help will be appreciated.

Thanks.

Re: PF5200 TBBEN mode

guoweisun — Tue, 20 Apr 2021 12:49:09 GMT

Why don't use NXP GUI to do that OTP? you also don't use the OTP programmer board to do it, right?

Re: PF5200 TBBEN mode

satheesh_mb — Tue, 20 Apr 2021 13:58:17 GMT

1. The NXP GUI supports only Windows OS and I like to use Linux system for configuring the PMIC's. Having Linux helps more in automation so I can avoid the manual selection from GUI.

2. Yes. The OTP programmer board wasn't used. I have an FTDI device and using it to communicate with PMIC.

Also , Is there any reference document available for configuring the PMIC without GUI and OTP programmer board ?

Re: PF5200 TBBEN mode

guoweisun — Wed, 21 Apr 2021 11:18:23 GMT

There is no too much resource to support your own OTP software and programmer board.

For the less number parts' OTP you can select NXP official OTP programmer board and GUI tool.

For the mass products, you can contact with local NXP or NXP distributors to do OTP after IC assembly during manufacture.

Re: PF5200 TBBEN mode

satheesh_mb — Wed, 21 Apr 2021 14:07:02 GMT

Thanks @guoweisun for the response.

One more point to clarify regarding the TBB mode,

On some PMIC I do see a Test mode Entry key write to enable the debug mode.
IS there any sequence is need for PF5024? If yes can we get those info's.

Thanks,