TPS650864: I2C address

Hi David,

Can you read register 0x00 using a GUI or software and tell me what the hex data report says? I want to make sure register 0x00 is actually reading back 0xAA from a digital perspective as well.

Regards,

James

Hi James,

Data value(Using Software) also display 0xAA. 

Thank.

Jinuk

Hello Jinuk,

The device expert is out of office due to public holiday in US. Please expect delay in response by tomorrow. 

Best regards,

Ishtiaque Panhwar

Hi Jinuk,

I just tested a sample of TPS6508641 and I'm reading 0x10 in register 0x00.

Can you share a full register dump of you IC? I want to see if there are any other mismatches in the registers.

Also please share an image of the IC top marking.

Regards,

James

Hi, James

First, can not use TI program(IPGUI.exe). because I use custom pcb board, do not use TI EVM.

My test environment is 

- TPSTPS6508641 communicate ZYNQ  XCZU2C6

- TPSTPS6508641 set default value.

- F/W(using xilinx vitis) setting -> IIC Device ID : 0x5E, Register offset : 0x00 -> but IIC response is 0xAA (i can see data value using Oscilloscope and Vitis)

And here is IC top marking 

Thank

Jinuk

Hi Jinuk,

Thank you for the additional information. I'm not sure why the 0x00 register would be different from the default configuration. Without a full register dump it's hard to tell if this is a larger issue or just a single instance of a register mismatch.

How many ICs are showing 0x00 = 0xAA? Is this just one IC out of hundreds or are all the units you have showing the issue?

Regards,

James

Hi James

All IC(tps6508641)s have same issue in custom pcb boards. 

And i have some questions.

First, can i get full register dump data using Vitits or any software in custom pcb board?

And, must do i need to set IC pin? (ex High or Low)

Thank!

Jinuk

Hi Jinuk,

I assume you have some I2C communication software that you are using to read register 0x00. Do you have a way to read all registers using this communication? I can't speak for third party software but any program that can send and receive I2C communication could be used to get the full register dump.

Alternatively, you can use a USB2ANY adapter to communicate with the custom board, but you would need to manually connect the SDA, SCL, and GND pins from the adapter to your board somehow.

There's no IC pin that needs to be set HIGH. As long as you are supplying the PMIC with VSYS voltage above 5.6V, you should be reading the correct I2C values. (LDO5P0 and LDO3P3 should be active when I2C is available).

I will attach a register dump from a TPS6508641 sample IC for reference. If you want to check other registers you can compare against this text file. Note that all registers after 0xBD come from the programming mode domain and should no be changed for the TPS6508641.

RegAddr		Value
00			10
01			24
02			08
03			FF
04			00
05			05
20			02
21			5A
22			38
23			38
24			41
25			0F
26			0F
27			0F
28			0D
29			0D
40			55
41			55
42			15
43			05
90			00
91			00
92			02
93			5A
94			E8
95			E8
96			40
97			40
98			70
99			70
9A			AA
9B			AA
9C			3F
9D			00
9F			F0
A0			00
A1			00
A2			40
A3			20
A4			FE
A5			FF
A6			F7
A7			7F
A8			DF
A9			FF
AA			F7
AB			EF
AC			EE
AD			5F
AE			48
AF			00
B0			FF
B1			7F
B2			00
B3			00
B4			00
B5			00
B6			00
B7			18
B8			2D
B9			1C
BA			74
BB			20
BC			38
BD			AA
02			A0
03			00
07			FF
08			EF
09			10
0A			FE
0B			CF
0C			10
0D			BE
0E			6F
0F			00
10			BE
11			EF
12			08
13			FE
14			6F
15			10
16			ED
17			EF
18			08
19			FF
1A			67
1B			00
1C			DF
1D			4F
1E			08
1F			D7
20			0B
21			C2
22			F7
23			AB
24			01
25			F7
26			37
27			00
28			18
29			FF
2A			27
2B			8C
2C			81
2E			BB
30			FF
32			61
34			AA
36			EB
38			A1
3A			AA
3C			FF
44			01
48			21
4C			21
53			AE
5C			05
5F			00

Regards,

James