Re: [Sdcc-user] PCF8574 16*4 LCD - 4bit mode

[Vikram T. <vik...@ya...>]

hi 

Yea I know that so I had already tried with both
addreses but of no use.



vikram



--- Jean-Paul <tch...@fr...> wrote:

> Hi,
> 
> 
> PCF8574 come in two flavors with two different fixed
> addresses
> 
> PCF85474 = 0 1 0 0 A2 A1 A0 RW = 0x40
> PCF8574A = 0 1 1 1 A2 A1 A0 RW = 0x70
> 
> It looks like you are using a PCF8574
> with the address of a PCF85474_A_
> and pins A2=0 A1=1 A0=1
> 
> Check and try again
> 
> 
> On Tue, 30 Aug 2005 10:57:35 -0700 (PDT), Vikram
> Tamboli  
> <vik...@ya...> wrote:
> 
> > Hi
> >
> > Actually I am trying to interface an 16*4 LCD to
> > AT89c51 using Pcf8574-I2C-io chip.
> >


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