Instruction Set Architecture—IP2022 User’s Manual 62 www.ubicom.com Figure 3-1  Data Memory Map 3.1 Addressing Modes The arithmetic and logical instructions have one or two operands.
The two-operand instructions implicitly use the W register as one
of the operands. The one-operand instructions and one of the two
operands used by two-operand instructions access data memory
using  addressing  modes.  The  addressing  mode  identifies  the
location in the data memory that is being accessed. A 9-bit field
within the instruction, called the “fr” field, specifies the addressing
mode and the address (in the case of direct addressing) or the
address offset (in the case of indirect-with-offset addressing), as
shown in Table 3-1. 515-028.eps            128
Special-Purpose Registers   3840 Bytes
Data Memory 0x000 7 0 0x080 0xFFF            128
Global Registers 0x100 0x07F 0x0FF