IP2022 User’s Manual—Instruction Set Architecture www.ubicom.com 161 IREADI Read Ext./Program Memory and Increment Operation: DATAH || DATAL = (ADDRX || ADDRH || ADDRL)
ADDRL = ADDRL + 2 Bits affected: None Opcode: 0000 0000 0001 1101 Description: This   instruction   transfers   data   from   external
memory, program flash memory, or program RAM
to data memory. The                                                                                     24-bit
ADDRX/ADDRH/ADDRL   register   specifies   the
address of a 16-bit word which is loaded into the
DATAH/DATAL   register,   then   the   address   is
incremented by 2. The instruction is blocking (i.e.
no    other    instructions    may    execute    until    it
completes) when it is used to read program RAM
or   when   it   is   executed   from   program   flash
memory  to  read  program  flash  memory.    The
instruction is non-blocking when it is used to read
external  memory  or  when  it  is  executed  from
program RAM to read program flash memory. Cycles: 4 (blocking)/1 (non-blocking)