hello im a student working on my senior project. we have selected the hcs1 as our MCU for this project. however, things are not as easy when you ar asked to actually surface mout and connect the hcs12. we have 3 hcs12 (but naked) -the 112 pin chip alone. is there a way someone can help my b providing my with the most basic hardware set up schematic?. we have buil about 3 pc boards and none had worked. the freescale site is not muc helpful. we are sure we have built a proper clock, a proper reset button a proper sci interface (used max233), proper jumpers for moda, modb, an modc pins. but for some reason it just dosent work. is not like im askin for it to respond with any d-bug 12. i just need the basic bootloader another thing, does any one know if this family has already the bootloade from factory. if not i heard that in order to load the s-record containin the bootloader one has to make use of other pins. which pins?, and how t interface with them?
any help will be much welcomed.....thank you....