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Need help for Cmos 4094

 
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aaa



Joined: 11 Jun 2009
Posts: 1

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Need help for Cmos 4094
PostPosted: Fri Jul 24, 2009 5:56 am     Reply with quote
Hi All,

i am facing a new problem. i am using 4094 shift registor. i had read data sheet. i want to know how it works? how to enable particular out pin and low all other. any one how can send me code example.
Thanks

Regards
aaa
ckielstra



Joined: 18 Mar 2004
Posts: 3680
Location: The Netherlands

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PostPosted: Fri Jul 24, 2009 8:34 am     Reply with quote
The 4094 is a very, very, old chip and not recommended for new designs. Better use the 74H595. CCS supplies a driver for this chip, see PICC/Drivers/74595.c

More info http://www.ccsinfo.com/forum/viewtopic.php?t=22789
treitmey



Joined: 23 Jan 2004
Posts: 1094
Location: Appleton,WI USA

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PostPosted: Fri Jul 24, 2009 9:41 am     Reply with quote
btw If your doing something high current ,ie relays or LEDs, I have been using a TPIC6C595 with the 74HC595 driver for a while now.
Great for turning on relays.
http://focus.ti.com/lit/ds/symlink/tpic6c595.pdf

as for code
Code:

...snip...
#define EXP_OUT_CLOCK   PIN_A3
#define EXP_OUT_DO      PIN_A4  //open collector, need a pull-up
#define EXP_OUT_ENABLE  PIN_A5
#define NUMBER_OF_74595 1
#include <74595.C>
...snip...
int8 tmp;
tmp=0b00000100;
write_expanded_outputs(&tmp);//write_expanded_outputs destroys the variable, use a tmp
Guest
PostPosted: Fri Jul 24, 2009 11:00 am     Reply with quote
Thanks for yours reply friends. I am not operating relay. I am operating 7 segment lcd using 4094, 4514 and 4056.

regads
aaa
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