HD6417615 Hitachi Semiconductor, HD6417615 Datasheet - Page 50

• Manufacturer Part Number: HD6417615
• Description: Hardware Manual
• Manufacturer: Hitachi Semiconductor

With the assembler, symbol names are used for R2, R3 ... R9. If it is wished to use a name that
makes clear the role of a register for DSP type instructions, a different register name (alias) can be
used. This is written in the following manner for the assembler.
32
Ix:
Notes:
.REG (R8)
1.
2.
3.
R0 also functions as an index register in the indirect indexed register
addressing mode and indirect indexed GBR addressing mode. In some
instructions, only the R0 functions as a source register or destination register.
R15 functions as a hardware stack pointer (SP) during exception processing.
Used as memory address registers, memory index registers with DSP type
instructions.
31
Figure 2.1 General Register Configuration
R15, SP
R0
R1
R2, [As]
R3, [As]
R4, [As, Ax]
R5, [As, Ax]
R6, [Ay]
R7, [Ay]
R8, [Ix, Is]
R9, [Iy]
R10
R11
R12
R13
R14
*1
*3
*3
*3
*3
*3
*2
*3
*3
*3
0