Hi I want to conncet lpc1343 to external sram this mcu dont have emc but I want to connect it can anyone help me for how to use it in keil
Why do you select the tiniest NXP LPC chip and then try to add external RAM?
Would you buy the smallest city car you can find and then try to refit it to draw a huge camping trailer?
If this is a skill test, then it's obviously something you should do on your own. If you really do need a solution with more RAM you should restart your work with a processor better suited to your needs.
If you want to bit-bang an external bus, then configure the GPIO's suitably, and do so. It's not going to be fast, and it's not going to map into the processors memory map. The Keil compiler isn't going to be able to access it directly, and you'll have to code routines to copy data in/out of the memory into internal memory.