IP2022 User’s Manual—Peripherals www.ubicom.com 277 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, trans-             mit on falling edge
01 =   Positive clock polarity, receive on falling edge,             transmit on rising edge
10 =   Negative clock polarity, receive on falling edge,             transmit on rising edge
11 =   Negative clock polarity, receive on rising edge,                     transmit on falling edge
GPSI mode: 00 =   Receive on rising edge, transmit on falling edge
01 =   Receive on falling edge, transmit on falling edge
10 =   Receive on rising edge, transmit on rising edge
11 =   Receive on falling edge, transmit on rising edge CLKS1:0 Clock source select 00 =   Clock disabled
01 =   Reserved
10 =   OSC clock oscillator
11 =   PLL clock multiplier Name Description