Anyone know where to get the M5450. Digikey and others show it is discontinued. BTW: M5451 has 35 outputs. Nelson -----Original Message----- From: pic microcontroller discussion list [mailto:PICLIST@MITVMA.MIT.EDU]On Behalf Of Andy Monks Sent: Thursday, August 22, 2002 2:44 PM To: PICLIST@MITVMA.MIT.EDU Subject: Re: [OT]: Multiplexing and 7 seg LEDs source= http://www.piclist.com/postbot.asp?id=piclist\1999\03\04\201136a Done anyone have any pic basic code for controlling the M5450. I'm new to pic programming, and I think my timing is out. --- Andy Monks http://www.piclist.com/member/AM-mweb-N9 PIC/PICList FAQ: http://www.piclist.com I have used the 5450 - it is as easy to use as it seems. The only gotcha's are ensuring the correct number of clock pulses per cycle so it doesn't get lost. Driving from PICBASIC (!) takes only a few lines of code. Display brightness controllable. No segment resistors needed. Very few other parts needed - a few r's and c's. Good drive current (15ma? per pin) (sink only). An oldie but a goodie. Russell McMahon From: Brian Jones a couple of days ago there was a thread re multiplexing 7 seg leds from 16F84. Has anyone considered the m5450 LED drivers. Serial in (only 2 PIC pins!!!) and 34 parallel out. Designed specifically for driving 4*7 seg LEDs but output can sink 15mW so might be useful as a general port expander. Will run at clock speeds up to 0.5Mhz which should be OK for many applications. Looks simple to program, clock start bit, 4*8 data bits (7 seg +dp), 2 extra bits (for centre colon on clock displays). 36th clock high loads the shift registers into their latches, next clock low generates reset. -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details. -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body