- 您現(xiàn)在的位置：買(mǎi)賣(mài)IC網(wǎng) > PDF目錄363901 > W79E803 (WINBOND ELECTRONICS CORP) 8-BIT MICROCONTROLLER PDF資料下載
參數(shù)資料
| 型號(hào)： | W79E803 |
| 廠商： | WINBOND ELECTRONICS CORP |
| 元件分類(lèi)： | 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(yè)數(shù)： | 53/115頁(yè) |
| 文件大小： | 1456K |
| 代理商： | W79E803 |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)第26頁(yè)第27頁(yè)第28頁(yè)第29頁(yè)第30頁(yè)第31頁(yè)第32頁(yè)第33頁(yè)第34頁(yè)第35頁(yè)第36頁(yè)第37頁(yè)第38頁(yè)第39頁(yè)第40頁(yè)第41頁(yè)第42頁(yè)第43頁(yè)第44頁(yè)第45頁(yè)第46頁(yè)第47頁(yè)第48頁(yè)第49頁(yè)第50頁(yè)第51頁(yè)第52頁(yè)當(dāng)前第53頁(yè)第54頁(yè)第55頁(yè)第56頁(yè)第57頁(yè)第58頁(yè)第59頁(yè)第60頁(yè)第61頁(yè)第62頁(yè)第63頁(yè)第64頁(yè)第65頁(yè)第66頁(yè)第67頁(yè)第68頁(yè)第69頁(yè)第70頁(yè)第71頁(yè)第72頁(yè)第73頁(yè)第74頁(yè)第75頁(yè)第76頁(yè)第77頁(yè)第78頁(yè)第79頁(yè)第80頁(yè)第81頁(yè)第82頁(yè)第83頁(yè)第84頁(yè)第85頁(yè)第86頁(yè)第87頁(yè)第88頁(yè)第89頁(yè)第90頁(yè)第91頁(yè)第92頁(yè)第93頁(yè)第94頁(yè)第95頁(yè)第96頁(yè)第97頁(yè)第98頁(yè)第99頁(yè)第100頁(yè)第101頁(yè)第102頁(yè)第103頁(yè)第104頁(yè)第105頁(yè)第106頁(yè)第107頁(yè)第108頁(yè)第109頁(yè)第110頁(yè)第111頁(yè)第112頁(yè)第113頁(yè)第114頁(yè)第115頁(yè)
W79E804A/803A/802A
Publication Release Date: July 16, 2007
- 53 -
Revision A2
9.1 Instruction Timing
This section is important because some applications use software instructions to generate timing
delays. It also provides more information about timing differences between the W79E804 series and
the standard 8051/52.
In W79E804 series, each machine cycle is four clock periods long. Each clock period is called a state,
and each machine cycle consists of four states: C1, C2 C3 and C4, in order. Both clock edges are
used for internal timing, so the duty cycle of the clock should be as close to 50% as possible to avoid
timing conflicts.
The W79E804 series does one op-code fetch per machine cycle, so, in most instructions, the number
of machine cycles required is equal to the number of bytes in the instruction. There are 256 available
op-codes. 128 of them are single-cycle instructions, so many op-codes are executed in just four clocks
period. Some of the other op-codes are two-cycle instructions, and most of these have two-byte op-
codes. However, there are some instructions that have one-byte instructions yet take two cycles to
execute. One important example is the MOVX instruction.
In the standard 8052, the MOVX instruction is always two machine cycles long. However, in the
W79E804 series each machine cycle is made of only 4 clock periods compared to the 12 clock
periods for the standard 8052. Therefore, even though the number of categories has increased, each
instruction is at least 1.5 to 3 times faster than the standard 8052 in terms of clock periods.
Single Cycle
C4
C3
C2
C1
CPU CLK
ALE
PSEN
AD<7:0>
Address <15:0>
A7-0
Address A15-8
Data_ in D7-0
Figure
9-1: Single Cycle Instruction Timing
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| W79E803A | 8-BIT MICROCONTROLLER |
| W79E803ADG | 8-BIT MICROCONTROLLER |
| W79E803ASG | 8-BIT MICROCONTROLLER |
| W79E804 | 8-BIT MICROCONTROLLER |
| W79E804A | 8-BIT MICROCONTROLLER |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| W79E803A | 制造商:WINBOND 制造商全稱(chēng):Winbond 功能描述:8-BIT MICROCONTROLLER |
| W79E803ADG | 制造商:WINBOND 制造商全稱(chēng):Winbond 功能描述:8-BIT MICROCONTROLLER |
| W79E803ASG | 制造商:WINBOND 制造商全稱(chēng):Winbond 功能描述:8-BIT MICROCONTROLLER |
| W79E804 | 制造商:WINBOND 制造商全稱(chēng):Winbond 功能描述:8-BIT MICROCONTROLLER |
| W79E804A | 制造商:WINBOND 制造商全稱(chēng):Winbond 功能描述:8-BIT MICROCONTROLLER |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。