+#elif SERIAL_0_PA08_PA09
+ /* Pin settings */
+ ao_enable_port(&samd21_port_a);
+ samd21_port_pmux_set(&samd21_port_a, 8, SAMD21_PORT_PMUX_FUNC_C);
+ samd21_port_pmux_set(&samd21_port_a, 9, SAMD21_PORT_PMUX_FUNC_C);
+ txpo = SAMD21_SERCOM_CTRLA_TXPO_TX_0; /* pad 0 */
+ rxpo = SAMD21_SERCOM_CTRLA_RXPO_RX_1; /* pad 1 */