RX634 Datasheet, PDF (18/106 Pages) Renesas Technology Corp – 54 MHz 32-bit RX MCU with FPU, 90 DMIPS, up to 2-Mbyte flash memory

RX634 Group
2. CPU
Figure 2.1 shows the register set of the CPU.
2. CPU
General-purpose register
b31
b0
R0 (SP)*¹
R1
R2
R3
R4
R5
R6
R7
R8
R9
R10
R11
R12
R13
R14
R15
DSP instruction register
b63
Control register
b31
ISP
USP
INTB
PC
PSW
BPC
BPSW
FINTV
FPSW
b0
(Interrupt stack pointer)
(User stack pointer)
(Interrupt table register)
(Program counter)
(Processor status word)
(Backup PC)
(Backup PSW)
(Fast interrupt vector register)
(Floating-point status word)
b0
ACC (Accumulator)
Note 1. The stack pointer (SP) can be the interrupt stack pointer (ISP) or user stack pointer (USP), according
to the value of the U bit in the PSW.
Figure 2.1
Register Set of the CPU
R01DS0255EJ0100 Rev.1.00
Feb 25, 2015
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