84 www.ubicom.com IP2022 Data Sheet 0x01F IPCL Interrupt return
address (low
byte) 00000000 0x020 RAIN Data on Port A
pins (read-only,
upper four bits
read as 0000) N/A 0x021 RAOUT Port A output
latch 00000000 0x022 RADIR Port A direction
register 11111111 0x023 LFSRH LFSR data reg-
ister (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 reg-
ister (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 Table 7-1  Register Addresses and Reset State (contin- Address Name Description Reset
Value 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 0x039 RGOUT Port G output
latch 00000000 0x03A RGDIR Port G direction
register 11111111 0x03B Reserved Reserved Reserved 0x03C Reserved Reserved Reserved 0x03D Reserved Reserved Reserved 0x03E Reserved Reserved Reserved 0x03F Reserved Reserved Reserved 0x040 RTTMR Real-time timer
value 00000000 0x041 RTCFG Real-time timer
configuration
register 00000000 0x042 T0TMR Timer 0 value 00000000 0x043 T0CFG Timer 0 configu-
ration register 00000000 0x044 T1CNTH Timer 1 counter
register (high
byte, read-only) 00000000 0x045 T1CNTL Timer 1 counter
register (low
byte, read-only) 00000000 0x046 T1CAP1H Timer 1 Capture
1 register (high
byte, read-only) 00000000 0x047 T1CAP1L Timer 1 Capture
1 register (low
byte, read-only) 00000000 Table 7-1  Register Addresses and Reset State (contin- Address Name Description Reset
Value