HD6417750RF240V Datasheet, PDF (57/606 Pages) Renesas Technology Corp – Renesas 16-Bit Single-Chip Microcomputer H8S Family/H8S/2600 Series

Section 2 CPU
2.4 Register Configuration
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).
General Registers (Rn) and Extended Registers (En)
15
ER0
E0
ER1
E1
ER2
E2
ER3
E3
ER4
E4
ER5
E5
ER6
E6
ER7 (SP)
E7
07
07
R0H
R1H
R2H
R3H
R4H
R5H
R6H
R7H
0
R0L
R1L
R2L
R3L
R4L
R5L
R6L
R7L
Control Registers (CR)
23
63
MAC
31
Sign extension
MACL
Legend:
SP: Stack pointer
PC: Program counter
EXR: Extended control register
T:
Trace bit
I2 to I0: Interrupt mask bits
CCR: Condition-code register
I:
Interrupt mask bit
UI: User bit or interrupt mask bit
0
PC
76543210
EXR T - - - - I2 I1 I0
76543210
CCR I UI H U N Z V C
41
32
MACH
0
H: Half-carry flag
U: User bit
N: Negative flag
Z: Zero flag
V: Overflow flag
C: Carry flag
MAC: Multiply-accumulate register
Figure 2.6 CPU Registers
Rev. 7.00 Sep. 11, 2009 Page 21 of 566
REJ09B0211-0700