RX230 datasheet(35/177 Pages) RENESAS

Part #	RX230

Description	54-MHz 32-bit RX MCUs, built-in FPU, 88.56 DMIPS, up to 512-KB flash memory

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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R01DS0261EJ0110 Rev.1.10

Page 35 of 177

Oct 30, 2015

RX230 Group, RX231 Group

2. CPU

2.

CPU

Figure 2.1

shows register set of the CPU.

Figure 2.1

Register Set of the CPU

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.

R15

R14

R13

R12

R11

R10

R9

R8

R7

R6

R5

R4

R3

R2

R1

R0 (SP)

*1

General-purpose register

b31

b0

DSP instruction register

b71

b0

ACC0 (Accumulator 0)

ACC1 (Accumulator 1)

USP (User stack pointer)

ISP (Interrupt stack pointer)

INTB (Interrupt table register)

PC (Program counter)

PSW (Processor status word)

BPC (Backup PC)

BPSW (Backup PSW)

FINTV (Fast interrupt vector register)

FPSW (Floating-point status word)

Control register

b31

b0

EXTB (Exception table register)

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