R01DS0190EJ0100 Datasheet, PDF (27/110 Pages) Renesas Technology Corp – 32 MHz 32-bit RX MCUs, 50 DMIPS, up to 128 Kbytes of flash memory

RX111 Group
2. CPU
Figure 2.1 shows the register set of the CPU.
2. CPU
General-purpose registers
b31
b0
R0 (SP) ^*1
R1
R2
R3
R4
R5
R6
R7
R8
R9
R10
R11
R12
R13
R14
R15
Control registers
b31
b0
ISP
(Interrupt stack pointer)
USP
(User stack pointer)
INTB
(Interrupt table register)
PC
(Program counter)
PSW
(Processor status word)
BPC
(Backup PC)
BPSW (Backup PSW)
FINTV (Fast interrupt vector register)
DSP instruction register
b63
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 register.
Figure 2.1
Register Set of the CPU
R01DS0190EJ0100 Rev.1.00
Jun 19, 2013
Page 27 of 107