16f628 supply voltage 3.3v

Hello to everybody,

I have a question.The datasheet of the 16f628 claims that the operation voltage range is 3.0v-5.5v.
I try to supply with 3.3v but it is dead.It starts working from 4.5V.
Do I need to set it so as to start from lower voltage.

Thnks in advance
Regards
Nikos Geronikolos

Set config fuse BOD "brown-out detect" to off to disable brown-out detection.

Look in the Electrical Specifications section of your data sheet for Brown-Out
Detect Voltage for an explanation.

Thanks Bruce,

I have just turn the brown-out detect to OFF.
All is playing nowwwww.


Thanks again.

Bruce an other one question.

Do you have any idea how I one pic will read an ASCII from an other and send to a pc.

What I mean is:

1st pic:

SerOUT portb.5,N2400,["ID:001 TYPE:A"] <----

2st pic:
SerIN portb.0,N2400,SerialData
hserout [SerialData]


My pc terminal is receiving $#%#$@^%$^

Please advice

Have you verified your PIC sending data to the PC works?

What happens if you send HSEROUT ["Hell World..!"]?

Also your sending 13 bytes from PIC #1, but only receiving "1" byte at PIC #2.

Look at using SERIN2 with the string modifier.

create an array in the second pic
X var byte
X = 15
serialData var byte[X] <- or however long the data is

1st pic:

SerOUT portb.5,N2400,["ID:001 TYPE:A"] <---- your outputting ascii

2st pic:
SerIN portb.0,N2400,SerialData <----your receiving the ascii number rep...
hserout [STR SerialData\X] <---declare tht it is a string your outputting


That should work but I didnt try it.

SerIN portb.0,N2400,SerialData is only going to receive a single byte of data.

Assuming you had a 13 byte array, I.E. SerialData VAR BYTE(13), then the
above would receive a single byte in SerialData(0).

The name of any array is simply a pointer to the starting address of the array
in RAM.

SerialData VAR BYTE(13)
SERIN2 portb.0,16780,[STR SerialData\13] would receive all 13 bytes.

Bruce,

I can talk with my PC using HSEROUT of the 2st pic.That is ok.

I try to use thje followings wityh no success:
--------------------------------------------
1st pic:
SerOUT portb.5,N2400,["ID:001 TYPE:A"] <----

2st pic:
SerialData VAR BYTE(13)
SerIN portb.0,N2400,SerialData
hserout [STR SerialData\13]
--------------------------------------------------
1st pic:
SerOUT2 portb.5,N2400,["ID:001 TYPE:A"] <----

2st pic:
SerialData VAR BYTE(13)
SerIN2 portb.0,N2400, [STR SerialData\13]
hserout [STR SerialData\13]
-----------------------------------------------------


Nothing is playing of the following

Please advice

Try changing these;

SerOUT2 portb.5,N2400,["ID:001 TYPE:A"]

SerIN2 portb.0,N2400, [STR SerialData\13]

To this;

SerOUT2 portb.5,16780,["ID:001 TYPE:A"] <----

SerIN2 portb.0,16780, [STR SerialData\13]

Does it work now?