/* The function is used to Unlock protected registers.  */
xtBoolean SysCtlKeyAddrUnlock(void)
/* The function is used to Unlock protected registers.  */
xtBoolean SysCtlKeyAddrUnlock(void)
{
    xHWREG(GCR_REGLOCK) = 0x59;
    xHWREG(GCR_REGLOCK) = 0x16;
    xHWREG(GCR_REGLOCK) = 0x88;
    return xHWREG(GCR_REGLOCK)&0x01;
}