r4f2456 Renesas Electronics Corporation., r4f2456 Datasheet - Page 80

• Manufacturer Part Number: r4f2456
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

Section 2 CPU
2.4
The H8S/2600 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 register (EXR), an 8-bit condition code register (CCR), and a 64-bit multiply-
accumulate register (MAC).
Rev. 1.00 Sep. 19, 2008 Page 50 of 1342
REJ09B0467-0100
Legend:
SP
PC
EXR
T
I2 to I0
CCR
I
UI
Note: * UI cannot be used as an interrupt mask bit in this LSI.
General Registers (Rn) and Extended Registers (En)
Control Registers (CR)
Registers
ER0
ER1
ER2
ER3
ER4
ER5
ER6
ER7 (SP)
MAC
: Stack pointer
: Program counter
: Extended register
: Trace bit
: Interrupt mask bits
: Condition-code register
: Interrupt mask bit
: User bit or interrupt mask bit *
63
31
15
Figure 2.6 CPU Registers
E0
E1
E2
E3
E4
E5
E6
E7
23
Sign extension
H
U
N
Z
V
C
MAC
MACL
0 7
: 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
EXR
CCR
0 7
T
7 6 5 4 3 2 1 0
7 6 5 4 3 2 1 0
I UI H U N Z V C
41
- - - -
MACH
R0L
R1L
R2L
R3L
R4L
R5L
R6L
R7L
I2 I1 I0
32
0
0
0