Register Configuration - Hitachi H8/3672 Series Hardware Manual

Single-chip microcomputer
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2.2

Register Configuration

The H8/300H CPU has the internal registers shown in figure 2-2. There are two types of registers;
general registers and control registers. The control registers are a 24-bit program counter (PC), and
an 8-bit condition code register (CCR).
General Registers (ERn)
15
ER0
ER1
ER2
ER3
ER4
ER5
ER6
ER7 (SP)
Control Registers (CR)
Legend
SP
:Stack pointer
PC
:Program counter
CCR
:Condition-code register
I
:Interrupt mask bit
UI
:User bit
0 7
E0
E1
E2
E3
E4
E5
E6
E7
23
Figure 2-2 CPU Registers
0 7
R0H
R0L
R1H
R1L
R2H
R2L
R3H
R3L
R4H
R4L
R5L
R5H
R6H
R6L
R7H
R7L
PC
7 6 5 4 3 2 1 0
CCR
I UI H U N Z V C
H
:Half-carry flag
U
:User bit
N
:Negative flag
Z
:Zero flag
V
:Overflow flag
C
:Carry flag
Rev. 1.0, 03/01, page
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