For data reception the IIU applies binary pulse length modulation (BPLM) decoding (Figure 18) and converts the decoded bits via the 8 bit shift-register into byte format.For data transmission the IIU converts the bytes via the shift-register into a bit stream and applies Manchester or CDP encoding (Figure 19). Since the encoding scheme can be selected via IIU_ENCSEL, the encoder also supports plain transmission (NRZ).The encoded output signal can modulate the LF field or can be directed to a port pin (via IIU_MODSEL).