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about 74165

 
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ferrarilib



Joined: 11 Jun 2005
Posts: 38

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about 74165
PostPosted: Sat Sep 24, 2005 12:20 pm     Reply with quote

i am trying use more from 3 pin pic to have 16pin for input data (16 bit)
i need use 74165 but i dont know how i can use it .
thare is schematic for this ?
thanks
PCM programmer



Joined: 06 Sep 2003
Posts: 21708

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PostPosted: Sat Sep 24, 2005 12:24 pm     Reply with quote

I suggest you use http://www.google.com with suitable keywords:
74165 CCS

This will quickly find the Blitzlogic example which has a schematic.
ferrarilib



Joined: 11 Jun 2005
Posts: 38

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PostPosted: Thu Oct 06, 2005 9:28 am     Reply with quote

i have try use 2 74165 and my schematic is easy to cascade mode .

my schematic is :

1� 2�
1 -> 1
2 -> 2 ---- C1 CLOCK
3-> out 3
4->out 4
5->out 5
6->out 6
7 NC 7
8 -------> 8 GND
9-----> D1
9 ---> 10
11 out 11
12 out 12
13 out 13
14 out 14
15 ---> 15 ---> GND
16-----> 16 ---> 5v



and this is mi code cange ..

#IFNDEF EXP_IN_ENABLE

#define EXP_IN_ENABLE PIN_C0 //b3
#define EXP_IN_CLOCK PIN_C1 //b4
#define EXP_IN_DI PIN_C5 //b5
#define NUMBER_OF_74165 2

#ENDIF
**************************

int16 inp;

read_expanded_inputs(&inp);


my problen is that read only the first chip
max result inp=00FF
and not FFFF when all input is to 1.

i do same thing not good ?
read only 8 bite
not 16 bite
thanks
ferrarilib



Joined: 11 Jun 2005
Posts: 38

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PostPosted: Thu Oct 06, 2005 10:02 am     Reply with quote

sorry i see because was not good

void read_expanded_inputs(byte *ei) {

to
void read_expanded_inputs(int16 *ei) {


thanks
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