hi ihsan,
instead of using in 8 bit data sending mode use 4 bit mode it will save 4 pin in the controller… paste your ckt diagram.. lets c if we can solve/ optimize your ckt…
here i am sending a 4 bit data mode for LCD example but that is in avr… just relate it….
http://www.engineersgarage.com/embedded/avr-microcontroller-projects/interface-lcd-4bit-mode-circuit