Samsung S3C2440A - Manual (Page 280)

I/O PORTS S3C2440A RISC MICROPROCESSOR
9-34
EINT5 [5] It is cleard by writing “1”
0 = not occur 1= occur interrupt 0
EINT4 [4] It is cleard by writing “1”
0 = not occur 1= occur interrupt
0
Reserved [3:0] Reserved 0000