Peripherals—IP2022 User’s Manual 234 www.ubicom.com RD4 37 Parallel Slave Peripheral Data RD5 38 Parallel Slave Peripheral Data RD6 39 Parallel Slave Peripheral Data RD7 40 Parallel Slave Peripheral Data RE0 41 Serial 1 Clock (S1CLK pin) RE1 42 Serial 1 Receive Plus-Side Data (S1RXP pin) RE2 43 Serial 1 Receive Minus-Side Data (S1RXM pin) RE3 44 Serial 1 Receive Data (S1RXD pin) RE4 45 Serial 1 Transmit Plus-Side Pre-Emphasis Data/Output
Enable (S1TXPE/S1OE pin) RE5 46 High Power Output, Serial 1 Transmit Plus-Side Data (S1TXP
pin) RE6 47 High Power Output, Serial 1 Transmit Minus-Side Data
(S1TXM pin) RE7 48 Serial 1 S1 Transmit Minus-Side Pre-Emphasis Data
(S1TXME pin) RF0 49 Serial 2 Transmit Plus-Side Pre-Emphasis Data/Output
Enable (S2TXPE/S2OE pin) RF1 50 High Power Output, Serial 2 Transmit Plus-Side Data (S2TXP
pin) RF2 51 High Power Output, Serial 2 Transmit Minus-Side Data
(S2TXM pin) RF3 52 Serial 2 Transmit Minus-Side Pre-Emphasis Data (S2TXME
pin) RF4 57 Serial 2 Clock (S2CLK pin) Table 4-1  I/O Port Pin Alternate Functions (continued) Name Pin Alternate Function