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SN75DP159: Pins: PRE_SEL & SLEW_CTL

Part Number: SN75DP159

Hello,

I have question regard pins mentioned above: 

  1. For PRE_SEL TI writes in the datasheet as below (which doesn't mention what is the config for I2C_EN/PIN = high):

 

De-emphasis pin strap when I2C_EN/PIN = Low.

PRE_SEL = L: - 2 dB de-emphasis

PRE_SEL = No Connect: 0 dB

PRE_SEL = H: Reserved

 

     How should I config this pin if I use pin I2C_EN/PIN = high? (pull up to Vcc or pull down to GND?)

  

  b.   For SLEW_CTL TI writes in the datasheet:

         

Slew rate control when I2C_EN/PIN = Low.

SLEW_CTL = H, fastest data rate

SLEW_CTL = L, 5 ps slow

SLEW_CTL = No Connect, 10 ps slow

When I2C_EN/PIN = High Slew rate is controlled through I2C

 

     What does it mean: "Slew rate is controlled through I2C" – how should I config this pin? (pull up to Vcc or pull down to GND?)

Thank you,

Edan