HD64F7050 RENESAS [Renesas Technology Corp], HD64F7050 Datasheet - Page 41

• Manufacturer Part Number: HD64F7050
• Description: 32-Bit RISC Microcomputer SuperH RISC engine Family/
• Manufacturer: RENESAS [Renesas Technology Corp]

2.1
The register set consists of sixteen 32-bit general registers, three 32-bit control registers and four
32-bit system registers.
2.1.1
The sixteen 32-bit general registers (Rn) are numbered R0–R15. General registers are used for
data processing and address calculation. R0 is also used as an index register. Several instructions
have R0 fixed as their only usable register. R15 is used as the hardware stack pointer (SP). Saving
and recovering the status register (SR) and program counter (PC) in exception processing is
accomplished by referencing the stack using R15. Figure 2.1 shows the general registers.
Notes:
Register Configuration
General Registers (Rn)
1.
2.
R0 functions as an index register in the indirect indexed register addressing
mode and indirect indexed GBR addressing mode. In some instructions, R0
functions as a fixed source register or destination register.
R15 functions as a hardware stack pointer (SP) during exception processing.
31
R15, SP (hardware stack pointer) *
Figure 2.1 General Registers
Section 2 CPU
R0 *
R10
R11
R12
R13
R14
R1
R2
R3
R4
R5
R6
R7
R8
R9
1
Rev. 5.00 Jan 06, 2006 page 21 of 818
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Section 2 CPU