h8s-2646 Renesas Electronics Corporation., h8s-2646 Datasheet - Page 62

• Manufacturer Part Number: h8s-2646
• Description: Renesas 16-bit Single-chip Microcomputer H8s Family/h8s/2600 Series
• Manufacturer: Renesas Electronics Corporation.

Section 2 CPU
2.4
2.4.1
The CPU has the internal registers shown in figure 2.7. There are two types of registers: general
registers and control registers.
Rev. 5.00 Sep 22, 2005 page 36 of 1136
REJ09B0257-0500
General Registers (Rn) and Extended Registers (En)
ER0
ER1
ER2
ER3
ER4
ER5
ER6
ER7 (SP)
Legend:
SP:
PC:
EXR:
T:
I2 to I0:
CCR:
I:
UI:
Note: * Cannot be used as an interrupt mask bit in the H8S/2646 Group.
Control Registers (CR)
Register Configuration
Overview
MAC
Stack pointer
Program counter
Extended control register
Trace bit
Interrupt mask bits
Condition-code register
Interrupt mask bit
User bit or interrupt mask bit *
15
63
31
E0
E1
E2
E3
E4
E5
E6
E7
23
Figure 2.7 CPU Registers
Sign extension
07
H:
U:
N:
Z:
V:
C:
MAC:
MACL
Half-carry flag
User bit
Negative flag
Zero flag
Overflow flag
Carry flag
Multiply-accumulate register
R0H
R1H
R2H
R3H
R4H
R5H
R6H
R7H
PC
07
EXR
CCR
41
T — — — — I2 I1 I0
7 6 5 4 3 2 1 0
7 6 5 4 3 2 1 0
I UI H U N Z V C
MACH
R0L
R1L
R2L
R3L
R4L
R5L
R6L
R7L
32
0
0
0