Register Quick Reference—IP2022 User’s Manual 396 www.ubicom.com 0x020 RAIN Data on Port A pins (read-only, upper
four bits read as 0000) N/A 0x021 RAOUT Port A output latch 00000000 0x026 RBDIR Port B direction register 11111111 0x024 RBIN Data on Port B pins (read-only) N/A 0x025 RBOUT Port B output latch 00000000 0x02A RCDIR Port C direction register 11111111 0x028 RCIN Data on Port C pins (read-only) N/A 0x029 RCOUT Port C output latch 00000000 0x02E RDDIR Port D direction register 11111111 0x02C RDIN Data on Port D pins (read-only) N/A 0x02D RDOUT Port D output latch 00000000 0x032 REDIR Port E direction register 11111111 0x030 REIN Data on Port E pins (read-only) N/A 0x031 REOUT Port E output latch 00000000 0x036 RFDIR Port F direction register 11111111 0x034 RFIN Data on Port F pins (read-only) N/A 0x035 RFOUT Port F output latch 00000000 0x03A RGDIR Port G direction register 11111111 0x039 RGOUT Port G output latch 00000000 0x041 RTCFG Real-time timer configuration register 00000000 0x040 RTTMR Real-time timer value 00000000 0x06B S1INTE SERDES 1 interrupt enable bits 00000000 0x06A S1INTF SERDES 1 status/interrupt flags 00000000 Table C-2  Register Addresses and Reset State (continued) Address Name Description Reset
Value