HD6432646 Hitachi, HD6432646 Datasheet - Page 70
HD6432646
Manufacturer Part Number
HD6432646
Description
(HD64F264x Series) 16-Bit Microcomputer
Manufacturer
Hitachi
Datasheet
1.HD6432646.pdf
(1155 pages)
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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.
36
General Registers (Rn) and Extended Registers (En)
Legend
SP:
PC:
EXR:
T:
I2 to I0:
CCR:
I:
UI:
Note: * Cannot be used as an interrupt mask bit in the H8S/2646 Series.
ER0
ER1
ER2
ER3
ER4
ER5
ER6
ER7 (SP)
Control Registers (CR)
MAC
Register Configuration
Overview
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
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