Registers - Renesas H8S/2100 Series Hardware Manual

6-bit single-chip microcomputer

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Section 2 CPU

Registers

The H8S/2000 CPU has the internal registers shown in figure 2.4. 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), and an 8-bit condition code register (CCR).

General Registers (Rn) and Extended Registers (En)

Control Registers (CR)

Stack pointer

Program counter

Extended control register

Interrupt mask bits

Condition-code register

Interrupt mask bit

Rev. 1.00 May 09, 2008 Page 34 of 954

REJ09B0462-0100

Figure 2.4 Registers in the CPU

7 6 5 4 3 2 1 0

7 6 5 4 3 2 1 0

I UI H U N Z V C

User bit or interrupt mask bit

Half-carry flag

Negative flag

Overflow flag