LMH1228: Required wait time after SPI writing

Takahiro Saito

Part Number: LMH1228

Hi team,

After SPI writing, how much time does customer need to wait to start input SDI data?

Regards,

Saito

0 Nasser Mohammadi over 5 years ago

Hi Saito-San,

There is no wait time from SPI write to start input SDI data.

At power up, normally there is about 25ms wait time from when power is stable to when we can start issuing I2C or SPI commands.

Regards,, Nasser

0 Takahiro Saito over 5 years ago in reply to Nasser Mohammadi

Hi Nasser-san,

Is it also no problem to input SDI data and then issue SPI command?

For example, SDI data input followed by EQ setting change by SPI commands.

Regards,

Saito

0 Nasser Mohammadi over 5 years ago in reply to Takahiro Saito

Hi Saito-San,

It is a good idea to reset CDR(CDR Reg 0x0A) after issuing SPI commands. This allows new settings through SPI to go into effect.

Regards,, Nasser

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