H838099 Datasheet, PDF (54/736 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8 Family / H8/300H Tiny Series

Section 2 CPU
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
E0
ER1
E1
ER2
E2
ER3
E3
ER4
E4
ER5
E5
ER6
E6
ER7
E7
07
07
R0H
R1H
R2H
R3H
R4H
R5H
R6H
(SP)
R7H
0
R0L
R1L
R2L
R3L
R4L
R5L
R6L
R7L
Control Registers (CR)
23
0
PC
[Legend]
SP: Stack pointer
PC: Program counter
CCR: Condition-code register
I: Interrupt mask bit
UI: User bit
76543210
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
Figure 2.2 CPU Registers
Rev. 2.00 Jul. 04, 2007 Page 14 of 692
REJ09B0309-0200