IP2022 Data Sheet www.ubicom.com 97 7.3.10    SxMODE Register 7.3.11    SxRCFG Register 7.3.12    SxRCNT Register 7 6 5 4 3 2 1 0 PRS3:0 SUBM1:0 CLKS1:0 Name Description PRS3:0 Protocol select. Unassigned encodings
are reserved. 0000 =   Disabled
0001 =   10Base-T
0010 =   USB Bus
0011 =   UART
0100 =   I²C
0101 =   SPI/Microwire SUBM1:0 Submode select (in USB mode):         01 =   Low-speed USB interface
        10 =   High-speed USB interface
Submode select (in Microwire and SPI
modes): 00 =   Receive on falling edge, trans-             mit on rising edge
01 =   Receive on rising edge, trans-             mit on rising edge
10 =   Receive on falling edge, trans-             mit on falling edge
11 =   Receive on rising edge, trans- mit on falling edge CLKS1:0 Clock source select
00 = Clock disabled 01 = Reserved 10 = OSC clock oscillator 11 = PLL clock multiplier 7 6 5 4 0 Reserved  SYNCMP  RPOREV RXSCNT4:0 Name Description SYNCMP Synchronization pattern detection dis-
able bit 0 =   Synchronization pattern           detection enabled
1 =   Synchronization pattern detection disabled RPOREV Receive data polarity reversal select 0 =   Data polarity uninverted
1 =   Data polarity inverted RXSCNT4:0 Receive shift count, specifies number of
bits to receive 7 6 5 4 0 Reserved    RxCRSCTRL1:0 RXACNT4:0 Name                                                         Description
RxCRSCTRL1:0    Carrier sense status and interrupt control 0x =   No interrupt. Software can             poll the RXXCRS bit in the
            SxINTF register for carrier
            status.
10 =   Intterupt on carrier detection
11 =   Interrupt on loss of carrier RXACNT4:0 Receive shift count, actual number
of bits received (read-only)