- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄379184 > DS83C520-MNL EPROM/ROM High-Speed Micro PDF資料下載
參數(shù)資料
| 型號(hào)： | DS83C520-MNL |
| 英文描述： | EPROM/ROM High-Speed Micro |
| 中文描述： | 存儲(chǔ)器/ ROM的高速微 |
| 文件頁數(shù)： | 21/45頁 |
| 文件大小： | 1415K |
| 代理商： | DS83C520-MNL |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁當(dāng)前第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁
DS87C520/DS83C520 EPROM/ROM High-Speed Microcontrollers
21 of 45
how the operation would compare when using the ring, and when starting up normally. The default state
is to exit Stop mode without using the ring oscillator.
The RGSL - Ring Select bit at EXIF.1 (EXIF; 91h) controls this function. When RGSL = 1, the CPU will
use the ring oscillator to exit Stop mode quickly. As mentioned above, the processor will automatically
switch from the ring to the crystal after a delay of 65,536 crystal clocks. For a 3.57MHz crystal, this is
approximately 18ms. The processor sets a flag called RGMD-Ring Mode, located at EXIF.2, that tells
software that the ring is being used. The bit will be a logic 1 when the ring is in use. Attempt no serial
communication or precision timing while this bit is set, since the operating frequency is not precise.
Figure 4. Ring Oscillator Exit from Stop Mode
EMI REDUCTION
One of the major contributors to radiated noise in an 8051-based system is the toggling of ALE. The
microcontroller allows software to disable ALE when not used by setting the ALEOFF (PMR.2) bit to 1.
When ALEOFF = 1, ALE will still toggle during an off-chip MOVX. However, ALE will remain in a
static mode when performing on-chip memory access. The default state of ALEOFF = 0 so ALE toggles
at a frequency of XTAL/4.
STOP MODE WITH RING STARTUP
STOP MODE WITHOUT RING STARTUP
NOTE:
DIAGRAM ASSUMES THAT THE OPERATION FOLLOWING STOP REQUIRES
LESS THAN 18ms TO COMPLETE.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| DS83C520-QCL | EPROM/ROM High-Speed Micro |
| DS83C520-QNL | EPROM/ROM High-Speed Micro |
| DS87C520 | EPROM/ROM High-Speed Micro |
| DS87C520-ECL | EPROM/ROM High-Speed Micro |
| DS87C520-ENL | EPROM/ROM High-Speed Micro |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| DS83C520-MNL+ | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:EPROM/ROM High-Speed Microcontrollers |
| DS83C520-QCL | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:EPROM/ROM High-Speed Micro |
| DS83C520-QCL+ | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:EPROM/ROM High-Speed Microcontrollers |
| DS83C520-QNL | 制造商:DALLAS 制造商全稱:Dallas Semiconductor 功能描述:EPROM/ROM High-Speed Micro |
| DS83C520-QNL+ | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:EPROM/ROM High-Speed Microcontrollers |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。