Register Configuration - Hitachi H8S/2378, H8S/2378R Series Hardware Manual

16 bit single-chip microcomputer
Table of Contents

Advertisement

2.4

Register Configuration

The H8S/2000 CPU has the internal registers shown in figure 2.6. 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).
General Registers (Rn) and Extended Registers (En)
ER0
ER1
ER2
ER3
ER4
ER5
ER6
ER7 (SP)
Control Registers
Legend
SP
PC
EXR
T
I2 to I0
CCR
I
UI
Note: For this LSI, the interrupt mask bit is not available.
15
E0
E1
E2
E3
E4
E5
E6
E7
23
:Stack pointer
:Program counter
:Extended control register
:Trace bit
:Interrupt mask bits
:Condition-code register
:Interrupt mask bit
:User bit or interrupt mask bit*
Figure 2.6 CPU Internal Registers
0 7
0 7
R0H
R1H
R2H
R3H
R4H
R5H
R6H
R7H
PC
7 6 5 4 3 2 1 0
T
EXR
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, 09/01, page 25 of 904
0
R0L
R1L
R2L
R3L
R4L
R5L
R6L
R7L
0
- - - -
I2 I1 I0

Hide quick links:

Advertisement

Table of Contents
loading

Table of Contents