![]() For example by connecting it to the chip select (CS) line of the SPI bus or a dedicated clock signal from the programmer. In this case you can trigger the reset line in short intervals. This is especially a problem with Intel chipsets because they contain an EC (named ME by Intel), which uses the flash (r/w!). In this case holding them in reset will not work. Intel ICHs/PCHs) have edge triggered resets. use a jumper instead of the reset push button). Try powering up the board normally and holding it in reset (e.g.In that case disconnect Vcc from the programmer and power it with its normal PSU and. Often parts of the chipset are powered on partially (by the voltage supplied via the Vcc pin of the flash chip). See the list of problems common with other types of programming setups first.Pomona, 3M) and are available from many distributors (I got mine from Distrelec) for 20-50$/€. They are produced by different vendors (e.g. ![]() ![]() If there is no special header then using a special SO(IC) clip is an easy and reliable way to attach an external programmer. Some mainboards have a special header for this (often named "ISP", "ISP1", or "SPI") and there should be no problem with accessing the chip then as long as the wires are not too long. ![]() This is usually done with SPI chips only. Of course any normal "BIOS flash" procedure is a kind of ISP but when we refer to ISP we usually mean something different: programming a flash chip by external means while it is mounted on a motherboard. In-System Programming (ISP) sometimes also called in situ programming is used to describe the procedure of writing a flash chip while it is (already/still) attached to the circuit it is to be used with. A cheap, but very fragile alternative: DIP socket as clip ![]()
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |