M30302MEP-xxx Renesas Technology, M30302MEP-xxx Datasheet - Page 9

• Manufacturer Part Number: M30302MEP-xxx
• Description: (M30302Mx) Single-Chip 16-Bit CMOS Microcomputer
• Manufacturer: Renesas Technology

Under development
M16C/30P Group
Rev.0.80
REJ03B0088-0080
2.
Figure 2.1 shows the CPU registers. The CPU has 13 registers. Of these, R0, R1, R2, R3, A0, A1 and FB comprise a
register bank. There are two register banks.
Figure 2.1
2.1
The R0 register consists of 16 bits, and is used mainly for transfers and arithmetic/logic operations. R1 to R3 are
the same as R0.
The R0 register can be separated between high (R0H) and low (R0L) for use as two 8-bit data registers.
R1H and R1L are the same as R0H and R0L. Conversely, R2 and R0 can be combined for use as a 32-bit data
register (R2R0). R3R1 is the same as R2R0.
Central Processing Unit (CPU)
b31
Data Registers (R0, R1, R2 and R3)
Mar 18, 2005
Central Processing Unit Register
Preliminary specification
Specifications in this manual are tentative and subject to change.
NOTES:
1. These registers comprise a register bank. There are two register banks.
R2
R3
b15
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IPL
b19
b19
INTBH
b15
b15
b15
b15
R0H
R1H
b8
b7
U
PC
I
INTBL
b8 b7
USP
FLG
ISP
SB
R2
R3
A0
A1
FB
O
B
S
R0L
R1L
Z
D
C
b0
b0
b0
b0
b0
b0
Data Registers
Address Registers
Frame Base Registers
Interrupt Table Register
Program Counter
User Stack Pointer
Interrupt Stack Pointer
Static Base Register
Flag Register
2. Central Processing Unit (CPU)
Carry Flag
Debug Flag
Zero Flag
Sign Flag
Register Bank Select Flag
Overflow Flag
Interrupt Enable Flag
Stack Pointer Select Flag
Reserved Area
Processor Interrupt Priority Level
Reserved Area
(1)
(1)
(1)