 SU.HARDW.CHAINIK (2:5020/299)  SU.HARDW.CHAINIK 
 From : Alexej Vladimirov                   2:5100/22.1     Sat 31 Dec 94 12:23 
 Subj :  ⠪ NVRAM?                                                        


 IK>   ᭨ y,   䨧᪮ p樯 p⠥
 IK> NVRAM (  CMOS, ᯮ짮   , etc.)?

p p 祪   p筨 Embedded Control Handbook:
"Everything a System Engineer Needs to Know About Serial EEPROM Endurance".
  - 8 p  p⨭  p⮬.

⠪, p㥬 祩 :

         祩 
  +------------------------------+
  |  ==p,=p=2==  |   pp p筮 롮p
  |  --᫮--p--  +---------------------------------+
  |  ==p,=p=1==       ==p,=p=2==   |
  |                  \       /                                     |
  |                   \     /                                      |
  |                    \---/                                       |
  |             90 ANG TD Oxide                                    |
  |----------------------------------------------------------------|
  |  ⮪    /                \           /            \   ⮪   |
  |_________/                    \-------/                \--------|
  |                                                                |
  |            (  ⠡)                                     |
  +----------------------------------------------------------------+

  奬  룫廊 ⠪ p:

騩 ⮪-------------+    +--------------+    +----⮢  ⮫
                        |____|              |____|
                            A                ----
                         ----                 T
                          T        ⢮p 롮p p
                    ⢮p 祩

⥭樠  ᮮ⢥ 窠 ᫥騥:
                       ⥭      p  p
⮢            1.6V     18.0V     0.0V       0.0V
⢮p 롮p p   5.0V     20.0V    20.0V       0.0V
⢮p 祩           5.0V      0.0V    20.0V       0.0V
騩 ⮪             0.0V   騩   0.0V       0.0V

 p   pp 롮p p   ⭮⥫쭮
᮪ p殮 20V.  p殮 pp p pp⥫.
  p   ⮨  p p ⥭樠
 ⭮⥫쭮 饣 p ⢮p.
  p ⢮p 祩 p 20V,   ⮪ ⮢ 
⮫ p 0V, p 㭭p  p p
90-p 㭭 p᪨ (TD) ᨤ  p
饬 ⢮p   p,  騩 ⢮p  p 室
p.  祩 室  ﭨ "ERASE" - "1".  p殮
p뢠  p⭮ p - 0V  ⢮p 祩  20 V  ⮪
⮢  ⮫, p 㭭p p TD ᨤ p⭮  p.
p 祩 室  ﭨ "WRITE" - "0".
᫥⥫쭮 ᥭ p鸞 (ERASE)  ᫥饣  p鸞
(WRITE) 뢠 横 p/ (E/W cycle).
⢮ ⠪ 横   祩 p祭.  p祭 뢠
p樥 ᨤ - ᮪ p殮, p뢠  祩.
- ⮣ 㬥蠥 p  p殮ﬨ ERASE  WRITE  
⮣,  ᨫ⥫ 뢠 㦥   p  ﭨ.
p 쭮 p ⢮ 横 E/W ⠢  2.000.000.
 -  䥪⮢  p  ᫮ ⥫쭮 㬥蠥 -
pp  10.000.
⮡ ᯥ 襥 ᫮ 横 E/W, ᯮ 奬 pp樨 訡.
Hpp,  NVRAM p Microchip p 奬 pp樨  :
  8 ⮢ ᯮ  4  pp樨  訡. 
p ⨬ ᫮ E/W 横   NVRAM ⨣ 1.000.000.

᪠ 讥 ᫮ ᫥⥫ NVRAM   256   64
,  ⠪ p p奬 flash-   2  
1 .

P.S. ᫨ p  p  NVRAM, 奬    ppp,
奬 祭  p p⢠ -  p.


ᥩ p. AV Micro

p AV Micro - 樠 p⠢⥫ p Microchip, p饩
p p ᫥⥫  p NVRAM p
93Cxx, 93AAxx, 24Cxx, 28Cxx, 24AAxx, 59C11, 85Cxx.  ᥬ pᠬ
p ⬠   p  avlad@memec.apex.arcus.lv.

--- GoldED 2.50.B0822+
 * Origin: * AV_Point - Riga, Latvia * (2:5100/22.1)

