R8C2K datasheet(29/471 Pages) RENESAS

No. de pieza	R8C2K

Descripción Electrónicos	RENESAS MCU R8C FAMILY / R8C/2x SERIES

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R8C/2K Group, R8C/2L Group

2. Central Processing Unit (CPU)

Rev.1.10

Dec 21, 2007

Page 12 of 450

REJ09B0406-0110

Central Processing Unit (CPU)

Figure 2.1 shows the CPU Registers. The CPU contains 13 registers. R0, R1, R2, R3, A0, A1, and FB configure a

Figure 2.1

CPU Registers

b31

b15

b8b7

Data registers(1)

Address registers(1)

R0H (high-order of R0)

INTBH

b15

b19

INTBL

Frame base register(1)

The 4 high order bits of INTB are INTBH and

the 16 low order bits of INTB are INTBL.

Interrupt table register

b19

USP

Program counter

ISP

User stack pointer

Interrupt stack pointer

Static base register

FLG

Flag register

Carry flag

Debug flag

Zero flag

Sign flag

Overflow flag

Interrupt enable flag

Stack pointer select flag

Reserved bit

Processor interrupt priority level

Reserved bit

IPL

b15

NOTE:

1. These registers comprise a register bank. There are two register banks.

R1H (high-order of R1)

R0L (low-order of R0)

R1L (low-order of R1)

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