Datasheet

Section 2 CPU
REJ09B0465-0300 Rev. 3.00 Page 33 of 982
Sep 17, 2010
H8S/20103, H8S/20203, H8S/20223, H8S/20115, H8S/20215, H8S/20235 Group
2.4 Register Configuration
The H8S/2000 CPU has the internal registers shown in figure 2.4. There are two types of registers:
general registers and control registers. Control registers are a 24-bit program counter (PC), an 8-
bit extended control register (EXR), and an 8-bit condition code register (CCR).
T I2I1I0 EXR
76543210
PC
23 0
15 0 7 0 7 0
E0
E1
E2
E3
E4
E5
E6
E7
R0H
R1H
R2H
R3H
R4H
R5H
R6H
R7H
R0L
R1L
R2L
R3L
R4L
R5L
R6L
R7L
SP
PC
EXR
T
I2 to I0
CCR
I
UI
: Stack pointer
: Program counter
: Extended control register
: Trace bit
: Interrupt mask bits
: Condition-code register
: Interrupt mask bit
: User bit or interrupt mask bit*
: Half-carry flag
: User bit
: Negative flag
: Zero flag
: Overflow flag
: Carry flag
ER0
ER1
ER2
ER3
ER4
ER5
ER6
ER7 (SP)
IUIHUNZVC
CCR
76543210
H
U
N
Z
V
C
General Registers (Rn) and Extended Registers (En)
Control Registers
Legend:
----
Note: * For this LSI, the interrupt mask bit is not available.
Figure 2.4 CPU Internal Registers