In some applications it may be desirable to control more than four LEDs per port. In cases where the additional LEDs are relatively static in nature and blinking is not required, the FPC202’s GPIO and unused OUT_* pins (for example, S1_OUT_A and S1_OUT_B) can be allocated for driving these LEDs in an active-low configuration. S0_OUT_C, S0_OUT_D, S1_OUT_C, and S1_OUT_D should be connected to LEDs requiring blinking and/or dimming, and up to four additional LEDs can be controlled per port from the GPIO, S1_OUT_A, and S1_OUT_B pins. Figure 7-2 shows an example of how up to eight LEDs can be controlled per port.

Figure 7-2 Example Configuration for Driving Eight LEDs Per Port