SH7616 Datasheet, PDF (59/935 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH™ RISC engine Family/SH7600 Series

Section 2 CPU
The name Ix is an alias for R8. The other aliases are assigned as follows:
Ax0:
Ax1:
Ix:
Ay0:
Ay1:
Iy:
As0:
As1:
As2:
As3:
Is:
.REG (R4)
.REG (R5)
.REG (R8)
.REG (R6)
.REG (R7)
.REG (R9)
.REG (R4) defined when an alias is required for single data transfer
.REG (R5) defined when an alias is required for single data transfer
.REG (R2) defined when an alias is required for single data transfer
.REG (R3) defined when an alias is required for single data transfer
.REG (R8) defined when an alias is required for single data transfer
2.1.2 Control Registers
The six 32-bit control registers consist of the status register (SR), repeat start register (RS), repeat
end register (RE), global base register (GBR), vector base register (VBR), and modulo register
(MOD).
The SR register indicates processing states.
The GBR register functions as a base address for the indirect GBR addressing mode, and is used
for such as on-chip peripheral module register data transfers.
The VBR register functions as the base address of the exception processing vector area (including
interrupts).
The RS and RE registers are used for program repeat (loop) control. The repeat count is
designated in the SR register repeat counter (RC), the repeat start address in the RS register, and
the repeat end address in the RE register. However, note that the address values stored in the RS
and RE registers are not necessarily always the same as the physical start and end address values
of the repeat.
The MOD register is used for modulo addressing to buffer the repeat data. The modulo addressing
designation is made by DMX or DMY, the modulo end address (ME) is designated in the upper 16
bits of the MOD register, and the modulo start address (MS) is designated in the lower 16 bits.
Note that the DMX and DMY bits cannot simultaneously designate modulo addressing. Modulo
addressing is possible with X and Y data transfer instructions (MOVX, MOVY). It is not possible
with single data transfer instructions (MOVS).
Rev. 2.00 Mar 09, 2006 page 33 of 906
REJ09B0292-0200