HD64F2602 datasheet(49/492 Pages) RENESAS

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Section 2 CPU

Rev. 1.00 Jan. 21, 2008 Page 17 of 456

REJ09B0425-0100

2.4

The H8S/2600 CPU has the internal registers shown in figure 2.6. There are two types of registers;

general registers and control registers. The control registers are a 24-bit program counter (PC), an

8-bit extended control register (EXR), an 8-bit condition code register (CCR), and a 64-bit

multiply-accumulate register (MAC).

TI2 I1 I0

EXR

76543210

MACH

MACL

MAC

0 7

R0H

R1H

R2H

R3H

R4H

R5H

R6H

R7H

R0L

R1L

R2L

R3L

R4L

R5L

R6L

R7L

SP:

PC:

EXR:

I2 to I0:

CCR:

UI:

Stack pointer

Program counter

Extended control register

Trace bit

Interrupt mask bits

Condition-code register

Interrupt mask bit

User bit or interrupt mask bit

Half-carry flag

User bit

Negative flag

Zero flag

Overflow flag

Carry flag

Multiply-accumulate register

ER0

ER1

ER2

ER3

ER4

ER5

ER6

ER7 (SP)

IUI H U N ZV C

CCR

76543210

MAC:

General Registers (Rn) and Extended Registers (En)

Control Registers (CR)

[Legend]

Sign extension

----

Figure 2.6 CPU Registers

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