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| 型號： | M30281MC-XXXHP-U5 |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 16-BIT, MROM, 20 MHz, MICROCONTROLLER, PQFP64 |
| 封裝： | 10 X 10 MM, 0.50 MM PITCH, LEAD FREE, PLASTIC, LQFP-64 |
| 文件頁數(shù)： | 15/35頁 |
| 文件大小： | 399K |
| 代理商： | M30281MC-XXXHP-U5 |
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2. Central Processing Unit(CPU)
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2. Central Processing Unit (CPU)
Figure 2.1 shows the CPU registers. The register bank is comprised of 7 registers (R0, R1, R2, R3, A0, A1
and FB) out of 13 CPU registers. Two sets of register banks are provided.
Figure 2.1 Central Processing Unit Register
2.1 Data Registers (R0, R1, R2 and R3)
The R0, R1, R2 and R3 registers are 16 bit registers for transfer and arithmetic/logic operations.
The R0 and R1 registers can be split into high-order bits(R0H, R1H) and low-order bits (R0L, R1L) to be
used seperately as 8-bit data registers. Conversely, R2 and R0 can be combined with R2 to be used as a
32-bit data register (R2R0). The same applies to R1 and R2.
2.2 Address Registers (A0 and A1)
The register A0 consists of 16 bits, and is used for address register indirect addressing and address register
relative addressing. They also are used for transfers and arithmetic/logic operations. A1 is the same as A0.
In some instructions, registers A1 and A0 can be combined for use as a 32-bit address register (A1A0).
Data registers
(1)
Address registers
(1)
Frame base registers
(1)
Program counter
Interrupt table register
User stack pointer
Interrupt stack pointer
Static base register
Flag register
NOTES:
1. The register bank is comprised of these registers. Two sets of register banks are provided.
R0H(R0's high bits)
b15
b8 b7
b0
R3
INTBH
US P
IS P
SB
R0L(R0's low bits)
R1H(R1's high bits)
R1L(R1's low bits)
R2
b31
R3
R2
A1
A0
FB
b19
INTBL
b15
b0
PC
b19
b0
b15
b0
FL G
b15
b0
b15
b0
b7
b8
b
Reserved space
Carry flag
Debug flag
Zero flag
Sign flag
Register bank select flag
Overflow flag
Interrupt enable flag
Stack pointer select flag
Reserved space
Processor interrupt priority level
The upper 4 bits of INTB are INTBH and
the lower 16 bits of INTB are INTBL.
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