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Register Structure - Hitachi H8/300L Series Manual

Single-chip microcomputer
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CPU

2. Register Structure

The H8/300L CPU register set consists of sixteen 8-bit general registers (referred to as
R0H/R0L through R7H/R7L), a 16-bit program counter (PC) used as a control register, and an
8-bit condition code register (CCR).
CPU Internal Organization
General registers
Control register
7
0
7
R0H
R1H
R2H
R3H
R4H
R5H
R6H
(SP)
R7H
15
PC
7
I
U H U N Z V C
CCR
28
0
R0L
R1L
R2L
R3L
R4L
R5L
R6L
SP: Stack pointer
R7L
0
PC: Program counter
5
3
2
1
0
CCR: Condition code register
Carry flag
Overflow flag
Zero flag
Negative flag
Half-carry flag
Interrupt mask bit
U: User bit

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