62 www.ubicom.com IP2022 Data Sheet Table 5-6  USB Interface Signal Usage         USB
Signal Name     SERDES
Signal Name SERDES1
Pin Name SERDES2
Pin Name Direction Description VP SxRXP RE1 RF5 Input Plus-side differential input VM SxRXM RE2 RF6 Input Minus-side differential input VPO SxTXP RE5 RF1 Output Plus-side differential output VMO SxTXM RE6 RF2 Output Minus-side differential output OE SxTXPE RE4 RF0 Output Output enable RCV SxRXD RE3 RF7 Input Receive data Clock SxCLK RE0 RF4 Input External clock input (optional) Table 5-7  Required Clock Frequencies from PLL in USB Mode Protocol Receive USB 1.1 Full Speed 48 MHz USB 1.1 Low Speed 6 MHz