Peripherals—IP2022 User’s Manual 276 www.ubicom.com 4.6.2 SxMODE Register 7 6 5 4 3 2 1 0 PRS3:0 SUBM1:0 CLKS1:0 Name Description PRS3:0 Protocol select (see Table 4-6). All other encodings are
reserved. 0000 =   Disabled
0001 =   10Base-T
0010 =   USB Bus
0011 =   UART
0101 =   SPI
0110 =   GPSI