At 01:00 PM 11/4/2005, you wrote: >So I did test it myself, more for personal curiosity that anything >and it does seem to work. >My setup uses a 10 MHz clock with PLL boosting BUSCLK to 22.727272 MHz. >Setting SCI0BR to 1 and enabling the internal loop gave expected result. OK, thanks for checking for me. Gary Olmstead Toucan Technology Ventura CA www.toucantechnology.com

Hi there, Sorry I though you had a dev board but without a pc or anything to test it. So I did test it myself, more for personal curiosity that anything and it does seem to work. My setup uses a 10 MHz clock with PLL boosting BUSCLK to 22.727272 MHz. Setting SCI0BR to 1 and enabling the internal loop gave expected result. As I said, I'm not quite sure if there is transceiver doing the job at that speed. But for TTL-2-TTL, it is working well. Fric Nadeau _____ De : 68HC12@68HC... [mailto:68HC12@68HC...] De la part de Gary Olmstead Envoy: 4 novembre 2005 10:49 : 68HC12@68HC... Objet : RE: [68HC12] SCI max baud rate? At 06:32 AM 11/4/2005, you wrote: >I think it should be ok. Mean to test it would be: >- to track in on the scope, if you have any >- to use both UART in loop mode, case where you have more than 1 >UART.. MC9S12DP512 has two for example >- to enable the SCI loop back, this internally tie rx & tx together, >this can be done by hardware also. > >Be aware that sometime the transceiver, usually a MAX232, does not >always support that speed. So for testing, avoid using transiver. Well, I know all that, but as I said, I don't have any hardware yet. Gary Olmstead Toucan Technology Ventura CA www.toucantechnology.com _____ > . _____

At 06:32 AM 11/4/2005, you wrote: >I think it should be ok. Mean to test it would be: >- to track in on the scope, if you have any >- to use both UART in loop mode, case where you have more than 1 >UART.. MC9S12DP512 has two for example >- to enable the SCI loop back, this internally tie rx & tx together, >this can be done by hardware also. > >Be aware that sometime the transceiver, usually a MAX232, does not >always support that speed. So for testing, avoid using transiver. Well, I know all that, but as I said, I don't have any hardware yet. Gary Olmstead Toucan Technology Ventura CA www.toucantechnology.com

Hi there, I think it should be ok. Mean to test it would be: - to track in on the scope, if you have any - to use both UART in loop mode, case where you have more than 1 UART.. MC9S12DP512 has two for example - to enable the SCI loop back, this internally tie rx & tx together, this can be done by hardware also. Be aware that sometime the transceiver, usually a MAX232, does not always support that speed. So for testing, avoid using transiver. I know that Atmel does give this kind of possibilities (something like 2meg/sec) but only work (at least tested by me) on atmel-2-atmel communication. Goodluck Fric Nadeau _____ De : 68HC12@68HC... [mailto:68HC12@68HC...] De la part de Gary Olmstead Envoy: 3 novembre 2005 13:04 : 68HC12@68HC... Objet : [68HC12] SCI max baud rate? I'm pushing numbers around in the SCI module, and have a question. If I set BUSCLK (or SCICLK, same difference) to, say 25 MHz, and set SCIBR to 1, the calculated baud rate is 1.562500 MHz. I don't have any hardware to try this on, so I have to ask: Is this possible in real life? Or is it like the PLL, where you can plug in numbers that can't be achieved in real life? Gary Olmstead Toucan Technology Ventura CA www.toucantechnology.com _____ > . _____

I'm pushing numbers around in the SCI module, and have a question. If I set BUSCLK (or SCICLK, same difference) to, say 25 MHz, and set SCIBR to 1, the calculated baud rate is 1.562500 MHz. I don't have any hardware to try this on, so I have to ask: Is this possible in real life? Or is it like the PLL, where you can plug in numbers that can't be achieved in real life? Gary Olmstead Toucan Technology Ventura CA www.toucantechnology.com