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參數(shù)資料
| 型號(hào)： | TC9028F |
| 元件分類： | 搖控器 |
| 英文描述： | INFRARED, TRANSMITTER IC, PDSO20 |
| 封裝： | 0.300 INCH, 1.27 MM PITCH, PLASTIC, SOP-20 |
| 文件頁數(shù)： | 18/21頁 |
| 文件大?。?/td> | 571K |
| 代理商： | TC9028F |
TC9028P/F
2002-01-08
6
2.6
L register (LR)
The L register is a 4 bit register. It is used as a data memory (RAM) address pointer. It can also be
used as a general-purpose register.
2.7
Data memory (RAM)
Data memory stores data to be processed by the user.
There are two data memory addressing modes. One is register indirect addressing mode, where the L
register specifies an address. The other is direct addressing mode, where the lower 3 bits of the
instruction field directly specify an address.
Figure 2.3 shows the L register and data memory configuration.
The data memory contents are undefined at reset. Make initial settings using the initialization
routine.
Figure 2.3 L register and data memory configuration
2.8
ALU, Accumulator
2.8.1
ALU
The ALU is a circuit which performs various
operations on 4 bit binary data.
The ALU performs operations according to
instructions and outputs results (4 bit), carry data
(C) and zero detection data (Z).
2.8.2
Accumulator (ACC)
The accumulator is a 4 bit register. It stores source
data and results.
Note 1: Cin indicates carry input
specified by instruction.
Figure 2.4 ALU and flags
Figure 2.5 Accumulator
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