
     .6-3 DS1202, DS1202S ⠫ ᫥⥫쭮 ஭

            ⢠

      ॠ쭮 ६  ᥪ㭤,  , , ᫮
      , ,   ४樥 ᮪᭮.
     RAM 248  ࠭ ஬ .
     ᫥⥫ /뢮  㬥襭 ᫠ ⠪⮢.
     㭪樮஢  2,0 - 5,5V.
     ॡ  300nA  殮 2V.
     ⭠   ⭠  (  ⭮ ०) ।
       ⥭    ᮢ  RAM.
     8-⠪ DIP  16-⠪   묨 뢮-
        ⠭  .
     ⮩ 3-஢ 䥩.
     TTL-ᮢ⨬ (Vcc=5V).
      ࠡ   ⥬ -40 - +85 .

            ᠭ ⠪⮢
     NC    -  ᯮ
     X1,X2 - 室  32,768 kHz
     GND   - 
     -RST  - 
     I/O   - /뢮 
     SCLK  - ᨭ஭
     Vcc   - ⠪ 筨 ⠭

            ᠭ
     ⠫ ᫥⥫쭮    ஭   DS1202   ᮤন
/ ॠ쭮 ६    24    ᪮  RAM.
頥  ய஬ ।⢮ ⮣ ᫥⥫-
 䥩.  /  ॠ쭮 ६  ।⠢
ଠ  ᥪ㭤, , , , ,   .
뢠 ᫮   ,  ४ ᮪ .
 ࠡ    24-  12-ᮢ ଠ  樥 /.
䥩 DS1202  ய஬ 饭 ᯮ짮  ᨭ-
஭ ᫥⥫쭮  裡.   裡  ᠬ/RAM ॡ
 3 ஢:  (1) - RST,  (2) - I/O,  (3) - SCLK.  
 ।  /  ᮢ/RAM      ⮬  24
. DS1202 ࠧࠡ⠭ 祭 ,   ࠭   
ଠ ᮢ, ॡ  1 ஢.

            㭪樮஢.
     ᭮   ᫥⥫쭮  ஭    
.1: ᤢ ॣ, ࠢ , ,  -
쭮 ६  RAM.   樠樨  ।   -RST
ॢ  ᮪ ﭨ,  ᥬ  㦠  ᤢ-
 ॣ,  ।騩  ,  .  ᫥-
⥫쭮   ⥫쭮 ९ SCLK.  8  -
।,    32 ⮢ ந 饭  横 -
    ⮢  ⭮ ।.᫥ 宦-
  8 横 ᨭ஭樨,  㦠  ᫮
 ᤢ ॣ,  ⥫ ⠪ 뢥   -
     .  ⢮  ᮢ  ᨭ஭樨
ࠢ 8+8  ⮢  8+( 192)  ⭮ ०.

             .
      ,  樨  । ,

                             - 2 -
  .2. 訩  ( 7)   ࠢ "1". ᫨
 ࠢ "0", 쭥襥 ⢨ 㤥 ४饭.  6 ।-
  ᮢ/,   ࠢ⢥ "0",   RAM 
ࠢ⢥ "1".   ࢮ   । ।祭
    뢮 ॣ,   訩 ( 0) -  -
 ()  "0"  ⥭ (뢮)   "1".    
, 稭  譣  ( 0).

         .1 -奬 DS1202
     1.  ॠ쭮 ६
     2.   ⥫
     3. 室 ᤢ ॣ
     4.                 5.    ࠢ
     6.  

         .2  /

              ࠢ ᨭ஭樥.
      ।  樨 ⠭ -RST  "1". 室
-RST 믮  㭪樨.  (1) -RST 砥  ࠢ,
 뢠  ᫥⥫쭮 /  ᤢ-
 ॣ.  (2) -RST   ४饭 - 
⭮ । .  ᨭ஭樨 -  ᫥-
⥫쭮  ⥫쭮  ᫥饣      ⥫쭮
९ SCLK.      稬  ६ -
⥫쭮,   뢮 -    ६  ⥫쭮  ९
SCLK. ।    ४頥  -RST="0",   ⠪ I/O
室  Z-ﭨ. ।   .3.

             .
     ᫥  ᥬ 横 SCLK,  騬   -
,  ⥫ ९ ᫥ 쬨  SCLK  
  .  砩 騥 ⥫ SCLK -
.     0.

            뢮 .
     ᫥  ᥬ SCLK,  騬   ⥭,  
⥫ ९ ᫥ 8- SCLK 뢮    -
.  ⬥⨬,      ।  室 
 ⥫ ९ SCLK  ᫥  ᫥  ᠭ
  .  ⥫ 横 SCLK । -
騥    -RST ⠥ ᮪.  -
  த⥫  ० ।.   -
   0.

             ०.
      ०      ᮢ/  -
஢ RAM 樥  31 筮 ( /
 ࢮ   ࠢ "1").  -०  6   
RAM,   0 - ⥭  .    ࠭   
ᠬ   8  31  ॣ ᮢ/   ᠬ  24
 31  ॣ RAM.

            /.
     / 祭    쬨 ॣ ⥭/,
   .4. , ᮤঠ騥  ॣ ᮢ/-
,  筮 ஢  ଠ (BCD).

             ⠭ ᮢ.

                             - 3 -
      7 ண ॣ ।  䫠  ⠭  ᮢ.
   ⠭  "1",  ᮢ ⠭,
 DS1202 室   १ࢭ ०  ⮪  ॡ-
  100nA.     ᠭ ᪨ "0" - 
饭.

            12- 24 ᮢ ०.
      7  ॣ ᮢ  ⮬ 롮 12-  24--
 ०. ᫨  7 ࠢ "1", ࠭ 12-ᮢ ०,  -
஬  5 -   AM/PM ( 5,  ࠢ "1",  ᮮ.  PM).  
24-ᮢ ०  5 -  ண ⪠ ᮢ (20-23 .).

               .
      7 -     ॣ.  ᥬ
 ( 0  6) ⠭  "0"   ᥣ 뤠 㫨
 ⥭.  ।    樥      RAM  7
  ࠢ .   ࠢ "1",    -
頥    㣮 ॣ.

              ० ᮢ/.
       ᮢ/   ⭮ -
.   ⮬  ० ᥬ ॣ஢ ᮢ/  
᫥⥫쭮 ⠭  ᠭ (. .4), 稭  -
 0  0.

             RAM.
     ᪠ RAM -  248 ,  㥬 ᫥⥫쭮
 ᭮ ࠭⢥ RAM.

              ० RAM.
       RAM   ०.   ⮬ ०  24
ॣ RAM      ᫥⥫쭮 ⠭  ᠭ
(. .4), 稭   0   0.

             ଠ ॣ஢.
     ଠ ॣ஢    .4.

             롮 楢 १.
     楢 १ 32,768kHz  Daiva  Part  No.DT26S,  Seiko
Part No.DS-VT-200       אַ 祭 
⠪⠬ 2  3 (1,2) DS1202.  ࠭    -
। 㧮   (CL) 6pF.     
Dallas Semiconductor.   DS9032.


         .3 । 
     1. ।          2. ᭠ 
     3. /뢮             4.  ० ।
     5. ᭠              6. ।  1
     7. ।  N          8. 㭪
     9. ⢮ ⮢           10. ⢮ SCLK
    11.                         12. RAM

         .4 /祭 ॣ஢
     1.  ॣ               2. 祭 ॣ
         . 
     3. ࠢ                   4.  ० ᮢ
     5. ⠭  "0"            6. . RAM
     7.  ० RAM

