IP2022 Data Sheet www.ubicom.com 81 0x01A FCFG Flash configuration register 0000 0000 0x01B TCTRL Timer 1/2 common control register 0000 0000 0x01C XCFG Extended configuration (bit 0 is read-only) 0000 000x (See Figure 3-5 for FBUSY)) 0x01D EMCFG External memory configuration register 0000 0000 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 Table 7-1  Register Addresses and Reset State (continued) Address Name Description Register Status Follow- ing Reset (Power-On,
RST, Brown-Out RST, Watchdog RST)