On Mon, 30 Mar 1998 23:18:27 -0800 WF AUTOMACAO writes: > I'm using the 16 data bus successfuly! But my problem is how >to >connect a ADC0808 (National's A/D), if it has a 8 bit data bus? Just connect it to 8 of the data lines. Usually the "low" 8 are used. The PIC always runs a 16 bit read cycle, but your program can ignore the 8 bits that aren't used. You can also do this with the RAM, only using one RAM chip and only using one of the table latch registers depending on which 8 bits are connected. Of course only data can be stored in the RAM then, not executable code, and it is a little slower to access. Make sure to check the timing specs on the devices you connect since a 17C4X at high clock rates doesn't give the external memories much time at all. _____________________________________________________________________ You don't need to buy Internet access to use free Internet e-mail. Get completely free e-mail from Juno at http://www.juno.com Or call Juno at (800) 654-JUNO [654-5866]