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參數(shù)資料
| 型號(hào)： | SCG9800 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 元件分類： | 8位微控制器 |
| 英文描述： | 8-BIT MICROCONTROLLER |
| 中文描述： | 8位微控制器 |
| 文件頁數(shù)： | 4/29頁 |
| 文件大?。?/td> | 135K |
| 代理商： | SCG9800 |
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SCG9800
8-BIT MICROCONTROLLER
Score Concept Semiconductor Ltd.
4
Sept 2000
Stack Register (SP)
An 8-bit Stack Register (SP) stores the address for stack operation. After CPU resets,
the value is $00. The SP has to be initialized at $FF by software. This means the
stack frame starts from the highest address memory location.
Program Status (PS)
This is an 8-bit Program Status Register. However only 4-bit is used for controlling
ALU operations and instruction execution sequences.
Program Status
Bit
7
6
5
4
3
2
1
0
Figure 3. 8-bit Program Status
Carry Flag (C)
Whenever there is a carry or borrow occurs after an arithmetic operation,
carry flag is set to 1. Otherwise, it is cleared to 0.
Besides, the “Rotate” instructions can also change the carry flag which value
is a bit shifted out of the specified source operand.
Executing single instruction of “SETC” or “CLRC” can also alter this flag.
Upon returning from an interrupt service routine, this flag will be restored.
Zero Flag (Z)
For arithmetic and logical operations, Zero flag will be set to 1 if the result is
zero.
Besides, for operation that involves moving source operand to accumulator,
zero flag will also be set to 1 if the content of the source operand is zero.
Upon returning from an interrupt service routine, this flag will be restored.
Sign Flag (N)
Sign flag stores the most significant bit of a result after the following operations: -
a.
Arithmetic
b.
Logic
c.
Move from source operand to accumulator
This flag will also be restored upon returning from an interrupt service routine.
Reserved
Sign Zero Carry
Interrupt
Mask
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SCG9816 | 8-BIT MICROCONTROLLER |
| SCG9832 | SCG9832 Microcontroller Specification |
| SCG9864 | 8-BIT MICROCONTROLLER |
| SCG9910 | 8-BIT MICROCONTROLLER |
| SCI7701YEA | CMOS VOLTAGE DETECTOR |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SCG9816 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-BIT MICROCONTROLLER |
| SCG9832 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:SCG9832 Microcontroller Specification |
| SCG9864 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-BIT MICROCONTROLLER |
| SCG9910 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:8-BIT MICROCONTROLLER |
| SCGC | 制造商:ALPS 制造商全稱:ALPS ELECTRIC CO.,LTD. 功能描述:Connector for SIM Card 8pins |
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