Datasheet

Section 2 CPU
Rev. 4.00 Sep 27, 2006 page 44 of 1130
REJ09B0327-0400
2.4 Register Configuration
2.4.1 Overview
The CPU has the internal registers shown in figure 2.7. There are two types of registers: general
registers and control registers.
T ———— I2 I1 I0EXR
*
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
General Registers (Rn) and Extended Registers (En)
Control Registers (CR)
Legend:
Stack pointer
Program counter
Extended control register
Trace bit
Interrupt mask bits
Condition-code register
Interrupt mask bit
User bit or interrupt mask bit
SP:
PC:
EXR:
T:
I2 to I0:
CCR:
I:
UI:
Note: * Does not affect operation in this LSI.
ER0
ER1
ER2
ER3
ER4
ER5
ER6
ER7 (SP)
I UI HUNZVCCCR
76543210
Half-carry flag
User bit
Negative flag
Zero flag
Overflow flag
Carry flag
H:
U:
N:
Z:
V:
C:
Figure 2.7 CPU Registers