/* GPIO Output: OSR=00, ISR=00, TSR=00, TCR=1 */
/* Alt. Funtion Input: OSR=00, ISR=01, TSR=00, TCR=0 */
/* Alt. Funtion Output: OSR=01, ISR=00, TSR=00, TCR=1 */
/* GPIO Output: OSR=00, ISR=00, TSR=00, TCR=1 */
/* Alt. Funtion Input: OSR=00, ISR=01, TSR=00, TCR=0 */
/* Alt. Funtion Output: OSR=01, ISR=00, TSR=00, TCR=1 */