Here's the new processor I mentioned a few weeks back. Its now been officially announced. It's not a PIC and it's not vapourware - real silicon exists including bind out chip s and an emulator will be available shortly. Looks like another attempt to keep uChip honest :-) Should be a very nice device for selected bottom to medium applications. Lack of EEROM seems the biggest omission. Better than 8 bit A2D would have been nice but ... It's a member of Philip's LPC (Low Pin Count) 8051 based microprocessor family. I'm asked to tell you DON'T HASSLE PHILIPS over this please. The sales people can't tell you more than I can tell you here. The chip will turn up as a real product "soon". I can get a little extra information for people who really really really want to know but only if you need it for a real use asap please. Remember, please DON'T HASSLE PHILIPS DON'T HASSLE PHILIPS DON'T HASSLE PHILIPS or I will probably not get as good information next time :-( The chip is the 87LPC768. It's much the same as the existing 87LPC767 with a 4 channel hardware PWM unit tacked on. PWM can be at 20 MHz or any integer submultiple thereof BUT all PWM's run at same basic frequency. Clock frequency is 20 MHz but it behaves like a 40 MHz 8051 due to a /6 clock divide - ie 300 nS per basic instruction. 87LPC767 datasheet is available on the net so all except PWM features can be found out about in detail Cost is said to be "low" Key features include - - 4 x PWM 2 to 10 bits clocked at up to 20 MHz. - I squared C - UART - 4 KB OTP - 128 byte RAM - 32 byte customer eprom for serialisation etc - 8 bit A2D x 4 channel x 9.3uS - 2 x Comparators - 2 x 16 bit timers - Crystal or RC clock - Vdd 4 to 6v at 20 MHz - Vdd 2.7 to 6v at 10 MHz - 8 x keypad interrupts plus 2 other external interrupts - Watchdog, own osc, 8 settings - on chip reset with no external components option - 2 level low voltage reset OR interupt - Osc fail detect - Range of port pin options (std silly quasi i/o plus several others). - 15 i/o (18 with on chip osc & reset) - 20 pin PDIP and SO - 1uA Stop mode - Serial programming. UART has nice 9th bit address recognise feature which allows it to ignore a data stream until it's own address comes along. For 8 x hardware PWM, 2 of these connected via either UART or I^2C would suffice. Low cost true emulator (ie with full speed hardware trace buffer) available soon Russell McMahon _____________________________ - www.easttimor.com Updated regularly: 100,000 refugees STILL in West Timor face starvation! - www.sudan.com And you think Kosovo and Chechnya are bad! What can one man* do? Help the hungry at no cost to yourself! at http://www.thehungersite.com/ (* - or woman, child or internet enabled intelligent entity :-)) -----Original Message----- From: Edson Brusque To: PICLIST@MITVMA.MIT.EDU Date: Friday, 3 March 2000 03:22 Subject: 8 channels PWM generator chip. [OT] >Hello, > > I'm making some research for a future product and want to know if >there's a chip that can generate 8 PWM outputs at high frequency (say, >30KHz) based on a serial input. It have to work as some kind of 8-channel >DAC, but outputting PWM and not linear voltage. > > Thanks, > > Brusque >