TPS23861: Semi - Auto mode

Hi Nagata,

Please see my answers below:

1) How to enter the semi - auto mode:

Datasheet shows the mode selection in  7.5.11 Operating mode register in datasheet. Are there another register to enter semi-auto mode? (e.g 7.5.13 Detect/Class Enable Register, 7.5.10 Slave Address Register / D7 bit(AUTO).

[PX] Configuring register 0x12 sets the operating mode. 

2) How to restart Detect / class:

Should user set 7.5.17 Detect/Class Restart Register to restart detect/class?

[PX]In auto mode and semi auto mode, as long as detection and classification are enabled (0x14) and you don't set the operating mode to off or disable detection and classification , they don't need to be re-enabled every time you want to turn on a port. 

3) PoE plus:

Can PoE plus be used in Semi - Auto mode? If yes, please let me know how to enable

[PX]You will need to enable 2 event classification in register 0x21. 

4) Error detection:

If some error is caused in TPS23861, which register should user refer?

[PX] errors are reported in registers: 0x06 ~0x0B

Best regards,

Penny

Nagata,

Please see my comments below.

- User set "11" of Semi - auto mode in 0x12 register

[PX] Yes.

- User doesn't need to set 0x18 register if Detect / Class at 0x14 is enabled

[PX]Yes. After setting ports to off mode, detection/classification will be disabled as well. In this case, you will need to re-enable detction/classification through register 0x14.

-  External CPU can control  when AUTO bit  (D7 bit in 0x11 register) is cleared.

[PX]Even when AUTO bit is set, you still can use CPU to change configurations.