Register Quick Reference—IP2022 User’s Manual 388 www.ubicom.com 0x021 RAOUT Port A output latch 00000000 0x022 RADIR Port A direction register 11111111 0x023 LFSRH LFSR data register (high byte) 00000000 0x024 RBIN Data on Port B pins (read-only) N/A 0x025 RBOUT Port B output latch 00000000 0x026 RBDIR Port B direction register 11111111 0x027 LFSRL LFSR data register (low byte) 00000000 0x028 RCIN Data on Port C pins (read-only) N/A 0x029 RCOUT Port C output latch 00000000 0x02A RCDIR Port C direction register 11111111 0x02B LFSRA LFSR address register 00000000 0x02C RDIN Data on Port D pins (read-only) N/A 0x02D RDOUT Port D output latch 00000000 0x02E RDDIR Port D direction register 11111111 0x02F Reserved Reserved Reserved 0x030 REIN Data on Port E pins (read-only) N/A 0x031 REOUT Port E output latch 00000000 0x032 REDIR Port E direction register 11111111 0x033 Reserved Reserved Reserved 0x034 RFIN Data on Port F pins (read-only) N/A 0x035 RFOUT Port F output latch 00000000 0x036 RFDIR Port F direction register 11111111 0x037 Reserved Reserved Reserved 0x038 Reserved Reserved Reserved Table C-1  Register Addresses and Reset State (continued) Address Name Description Reset
Value