shery 
hello everyone. I want to control motor by TOUT1(GPB1pin). I checked s3c2440'sDatasheet. so How should Setup these Register TCFG0 (0x51000000) TCFG1 (0x51000004) TCON (0x51000008) TCNTB1 (0x51000018) TCMPB1 (0x5100001C) GPBCON (0x56000008) These are my Idea. [Register] [value] [comment] TCFG0 0x1 (prescaler0 value=1) TCFG1 0x0 (diviver value=2) TCON 0x500300 (Timer 1 start,Update TCNTB1&TCMPB1) TCNTB1 0x3e8 (frequency =1000) TCMPB1 0x50 (PWMvalue=50) GPBCON 0x8 (GPBCON1=TOUT1) I tried this Conditions. But GPB1 didnt work. please help me.