参数资料
型号: S3P9664-AM
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 6 MHz, MICROCONTROLLER, PDIP24
封装: 0.300 INCH, SDIP-24
文件页数: 56/148页
文件大小: 784K
代理商: S3P9664-AM
ADDRESSING MODES
S3C9664/P9664 (Preliminary Spec)
3-2
REGISTER ADDRESSING MODE (R)
In Register addressing mode, the operand is the content of a specified register (see Figure 3-1). Working register
addressing differs from Register addressing because it uses a 16-byte working register space in the register file
and a 4-bit register within that space (see Figure 3-2).
dst
Value used in
Instruction Execution
OPCODE
OPERAND
8-bit Register
File Address
Point to One
Rigister in Register
File
One-Operand
Instruction
(Example)
Sample Instruction:
DEC
CNTR
;
Where CNTR is the label of an 8-bit register address
Program Memory
Register File
Figure 3-1. Register Addressing
dst
OPCODE
4-Bit
Working Register
Point to the
Woking Register
(1 of 16)
Two-Operand
Instruction
(Example)
Sample Instruction:
ADD
R1, R2
;
Where R1 = C1H and R2 = C2H
Program Memory
Register File
src
4 LSBs
OPERAND
CFH
C0H
.
Figure 3-2. Working Register Addressing
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