LMH1228: Reset and re-initialization after power on

Takahiro Saito

Part Number: LMH1228

Hi team,

1.After the device power on, customer wants to reset Share, CTLE/CDR, Driver registers.

These registers are reset autmatically after power on, correct? Or, does customer need to reset from host after the device power on?

2. About 3.2.2.2 in Programming guide SNAU206, the re-initialization is done after resetting registers in each register page.

Is it no problem to move other pages during reinitialization?

Regards,

Saito

over 6 years ago

0 Nasser Mohammadi over 6 years ago

TI__Guru* 93570 points

Hi Saito-San,

1). Registers are at default settings on power up and there is no need to reset these registers.

2). During product development, the developer may change many registers and may not know what registers have been modified. For convenience, without powering down the device, section 3.2.2.2 specifies how to restore register values for share registers, CTLE/CDR registers, or Driver register. Once registers are reset as noted in section 3.2.2.2 we must wait until this is done. Also, please note if user knows what registers have changed he or she can simply change these back to the default values and there is no need to implement section 3.2.2.2.

Regards,, Nasser