IP2022 User’s Manual—Instruction Set Architecture www.ubicom.com 95 Table 3-8  System Control Instructions Assembler Syntax Description Opcode break Software break-
point 1 0000 0000 0000 0001 None ferase Erase flash block 1 0000 0000 0000 0011 None fread Read from flash
memory 1 0000 0000 0001 1011 None fwrite Write into flash
memory 1 0000 0000 0001 1010 None iread Read exter-
nal/program
memory 4 0000 0000 0001 1001 None ireadi Read exter-
nal/program
memory and
increment 4 0000 0000 0001 1101 None iwrite Write exter-
nal/program
RAM 4 0000 0000 0001 1000 None iwritei Write exter-
nal/program
RAM and incre-
ment 4 0000 0000 0001 1100 None