main() { CPUCS = ((CPUCS & ~bmCLKSPD) | bmCLKSPD1) ; IFCONFIG |= 0xC0; SYNCDELAY; PORTACFG |= 0x08; SYNCDELAY; OEE = 0x01; SYNCDELAY; IOE &= ~0x01; // clear bit 0 IOE |= 0x01; // set bit 0 }