Optron #31 28 сентября 1999

Доработки     Железо

Iron - CMOS for all.

  Some comments on the scheme.

  Conclusions are not involved in DS1287,
marked on the scheme as "x".

  ZQ1 - a buzzer alarm.

  Q1 - quartz for CMOS'a.

  -ON/OFF Signal can be used to
circuits turn on your computer.

  Signal-CLR I connect to the circuit +5 v, but
It can also apply for entry-RESET
computer. If on-CLR send a signal to
O-IRQ, then after a period specified by
RC-chain will be reset CMOS'a. This
fact can be used to stop the clock.

  I have all applied in the circuit chip
"Tying" - a series of 1533. Diodes - KD522.

  In applying the DS1287 (DALLAS'a as her
called), I recommend also to install
between its conclusion 24 (Ucc) and 12 (GND)
blocking capacitor of 47
up to 100 uF.

  From the Editor.

  Why should I apply it
These values ​​- is "know how" of the author. We
, on the other hand, believe that enough capacitor though not 
so great capacity (0.1 - 1.0 uF), but high, for example, KM, 
K10-17, as "electrolytes", because of its inductance, 
high-frequency component is not filtered.



  From the perspective of a programmer, CMOS
is a 64 case.

  Registers # 00 - # 09 are internal
RAM for storing the values
time (current and alarm clock) - from seconds - before the days 
of the week, month and year. 

  Registers # 0A - # 0D are service and
contain the information necessary for the clock - setting 
values, flags, interrupts and reliability of the information. 

  Registers # 0E - # 3F - external RAM read / write random 
information. So use them as you wish.

Mr.Gluk, for example, uses them for its
flash ROM.

  Run the CMOS using a special program or properly load
registers (of the STS, for example).


  Additional notes.

  If anyone will have problems with the acquisition, 
connection, start the clock - to contact me. My coordinates - 
on the page "About". 

  I express my deep gratitude to Renata
Mamedov, Dmitry Lomov and Alexander Mayorov to the idea of 
​​connecting to the Speccy and CMOS for materials on the 
subject.