hi dear dyn09dyn09 said:I've made an AT89c51snd1 reference design
with the schematic, everything seems to work fine
except I can't upload any files from the PC.
It says "Disk is write protected" (although there is no sticker
on the SmartMedia card)
Has anybody experienced this problem?
Should the X2 bit be set during programming?
Are there any other configuration bits I should know about?