Hello everyone
I am working on LPC2468 usb host with mass storage class . I am using NXP usb hostlite example as a base. I converted this source code for FAT32 system. It,s working fine for KIGNSTON 8 GB, SANDISK 4 GB pendrive. But when i used Hp 8 GB pendrive , it works fine sometime or sometime not.when I debug through the software the value of HOST_RhscIntr is not changing to 1. What,s the reason behind it.
Lots of manufacturers buys batches of components when they build cards. So if you buy same article number, you can get totally different contents inside every time you buy.
They should all be working - if the manufacturer isn't directly stupid - but will very different specifications. Some fast, some slow. Some supporting many rewrites, some supporting few. Some having huge tolerances for supply voltages, while some needing very close to 5V.
Quite few card manufacturers have own flash manufacturing or buy same memory chips all the time from the same manufacturer.