84 www.ubicom.com IP2022 Data Sheet 7.0.2 Program Memory Table 7-2 shows the addresses and reset values of all special-purpose registers in data memory, sorted by their address. 0x07B S2INTE SERDES 2 interrupt enable bits 0000 0000 0x07C S2MODE SERDES 2 serial mode/clock select register 0000 0000 0x07D S2SMASK SERDES 2 receive sync mask 0000 0000 0x07E CALLH Top of call stack (high 8 bits) 1111 1111 0x07F CALLL Top of call stack (low 8 bits) 1111 1111 0x080 to 0x0FF Directly addressable general-purpose (global) reg-
isters Undefined after power-on
or brown-out reset,
unchanged after RST or
Watchdog Timer reset 0x100 to 0xFFF Data memory Undefined after power-on
or brown-out reset,
unchanged after RST or
Watchdog Timer reset 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) Table 7-2  Program Memory Addresses Address Description Register Status Follow- ing Reset (Power-On,
RST, Brown-Out RST, Watchdog RST) 0x0000 to 0x1FFF
(word addresses) Program Memory RAM Undefined after power-on
or brown-out reset,
unchanged after RST or
Watchdog Timer reset 0x8000 to 0xFFFF Program Memory Flash  Unchanged after power-
on, brown-out reset, RST or Watchdog Timer reset