92 www.ubicom.com IP2022 Data Sheet 7.1.11    SxMODE Register SERDES protocol mode configuration. 7 6 5 4 3 2 1 0 PRS3:0 SUBM1:0 CLKS1:0 Name Description PRS3:0 Protocol select (see Table 5-4). All other
encodings are reserved. 0000 =   Disabled 0001 =   10Base-T 0010 =   USB Bus 0011 =   UART 0101 =   SPI 0110 =   GPSI SUBM1:0    Submode select USB mode: 01 =   Low-speed USB interface 10 =   High-speed USB interface SPI mode: 00 =   Positive clock polarity, receive on rising edge, transmit on fall-
ing edge 01 =   Positive clock polarity, receive on falling edge, transmit on ris-
ing edge 10 =   Negative clock polarity, receive on falling edge, transmit on ris-
ing edge 11 =   Negative clock polarity, receive on rising edge, transmit on fall-
ing edge GPSI mode: 00 =   Receive on rising edge, trans- mit on falling edge 01 =   Receive on falling edge, trans- mit on falling edge 10 =   Receive on rising edge, trans- mit on rising edge 11 =   Receive on falling edge, trans- mit on rising edge CLKS1:0 Clock source select. When 00 =   Clock disabled 01 =   SxCLK input 10 =   OSC clock oscillator 11 =   post-PLL clock Name Description