/members-area/personalblogs/b/blog/posts/gpio-tutorial-for-arm7tdmi-lpc2148General purpose input output (GPIO) is same thing you find in any microcontroller like 8051, avr etc. Lpc2148 have two General Purpose I/O ports port 0 & port1.port0 & port1 both are 32-bit bi-directional ports like 8051 has four 8...en-USTelligent Community 12