IP2022 Data Sheet www.ubicom.com 31 0x01E IPCH Interrupt return address (high byte) 0000 0000 0x01F IPCL Interrupt return address (low byte) 0000 0000 0x020 RAIN Data on Port A pins N/A 0x021 RAOUT Port A output latch 0000 0000 0x022 RADIR Port A direction register 1111 1111 0x023 LFSRH LFSR data register (high byte) 0000 0000 0x024 RBIN Data on Port B pins N/A 0x025 RBOUT Port B output latch 0000 0000 0x026 RBDIR Port B direction register 1111 1111 0x027 LFSRL LFSR data register (low byte) 0000 0000 0x028 RCIN Data on Port C pins N/A 0x029 RCOUT Port C output latch 0000 0000 0x02A RCDIR Port C direction register 1111 1111 0x02B LFSRA LFSR address register 0000 0000 0x02C RDIN Data on Port D pins N/A 0x02D RDOUT Port D output latch 0000 0000 0x02E RDDIR Port D direction register 1111 1111 0x02F Reserved Reserved Reserved 0x030 REIN Data on Port E pins N/A 0x031 REOUT Port E output latch 0000 0000 0x032 REDIR Port E direction register 1111 1111 0x033 Reserved Reserved Reserved 0x034 RFIN Data on Port F pins N/A 0x035 RFOUT Port F output latch 0000 0000 0x036 RFDIR Port F direction register 1111 1111 0x037 Reserved Reserved Reserved 0x038 Reserved Reserved Reserved 0x039 RGOUT Port G output latch 0000 0000 0x03A RGDIR Port G direction register 1111 1111 0x03B Reserved Reserved Reserved 0x03C Reserved Reserved Reserved 0x03D Reserved Reserved Reserved 0x03E Reserved Reserved Reserved 0x03F Reserved Reserved Reserved Table 3-9  Register Addresses and Reset State (continued) Address Name Description Register Status Follow-  ing Reset (Power-On,
RST, BOR, Watchdog)