LCD nothing displays - RX boards.

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LCD nothing displays - RX boards.

hamix
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#5

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24-05-2015, 13:58

(This post was last modified: 24-05-2015, 20:53 by hamix.)

Hi,
I've attached three photos: Backside of LCD module and i2c to parallel converter module and i2c addresses of PCF8574 familiy.
According to the daha sheet there is a diffrence between PCF8574 and PCF8574A.
A4 and A5 address lines of PCF8574 are 0, but these lines are 1 for PCF8574A.
So, if i2c to parallel module used a PCF8547, the i2c address is 27h (39d) but used a PCF8574A the i2c address must be 3Fh (63d).

Regards.

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24-05-2015, 13:35

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Messages In This Thread

LCD nothing displays - RX boards. - by hamix - 22-05-2015, 20:38

RE: LCD nothing displays - RX boards. - by werk_ag - 22-05-2015, 22:11

RE: LCD nothing displays - RX boards. - by hamix - 23-05-2015, 14:28

RE: LCD nothing displays - RX boards. - by werk_ag - 23-05-2015, 15:15

RE: LCD nothing displays - RX boards. - by hamix - 24-05-2015, 13:58

RE: LCD nothing displays - RX boards. - by werk_ag - 24-05-2015, 21:39

RE: LCD nothing displays - RX boards. - by hamix - 25-05-2015, 08:13

RE: LCD nothing displays - RX boards. - by zitoune - 26-06-2015, 17:47

RE: LCD nothing displays - RX boards. - by werk_ag - 26-06-2015, 19:52

RE: LCD nothing displays - RX boards. - by zitoune - 30-06-2015, 15:50

RE: LCD nothing displays - RX boards. - by werk_ag - 30-06-2015, 17:58

RE: LCD nothing displays - RX boards. - by zitoune - 03-07-2015, 12:15

RE: LCD nothing displays - RX boards. - by werk_ag - 04-07-2015, 03:27

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