GPIO Drive Current

Question

Hi,
Is it possible to control the drive current of the gpio pin?
Can anyone explain the different possible drive configuration for gpio's (S0S1,H0S1, etc..)? 
 Regards,
Balaji

Hung Bui · Accepted Answer

@Balaji: You can limit the maximum current sink or source on the pin using 2 levels: 
 
 S-standard drive(0.5mA) 
 H-high drive (5mA)
For example S1H0 means standard sink (logic 1) and high drive source (logic 0) 
 
 Please refer to section 8.23 in the nRF51822 Product Spec and section 13.2.8 in the Reference Manual.