+ #define UART0_PORT PIOA_BASE
+ #define USART0_PORT PIOA_BASE
+ #define USART1_PORT PIOA_BASE
+ #define USART2_PORT PIOB_BASE
+ #define USART3_PORT PIOD_BASE
+
+ #define UART0_PERIPH PIO_PERIPH_A
+ #define USART0_PERIPH PIO_PERIPH_A
+ #define USART1_PERIPH PIO_PERIPH_A
+ #define USART2_PERIPH PIO_PERIPH_A
+ #define USART3_PERIPH PIO_PERIPH_B
+
+ #define URXD0 8
+ #define UTXD0 9
+ #define RXD0 10
+ #define TXD0 11
+ #define RXD1 12
+ #define TXD1 13
+ #define RXD2 21
+ #define TXD2 20
+ #define RXD3 5
+ #define TXD3 4
+#elif CPU_CM3_SAM3N || CPU_CM3_SAM3S
+ #define UART0_PORT PIOA_BASE
+ #define UART1_PORT PIOB_BASE
+ #define USART0_PORT PIOA_BASE
+ #define USART1_PORT PIOA_BASE
+
+ #define UART0_PERIPH PIO_PERIPH_A
+ #define UART1_PERIPH PIO_PERIPH_A
+ #define USART0_PERIPH PIO_PERIPH_A
+ #define USART1_PERIPH PIO_PERIPH_A
+
+ #define URXD0 9
+ #define UTXD0 10
+ #define URXD1 2
+ #define UTXD1 3
+ #define RXD0 5
+ #define TXD0 6
+ #define RXD1 21
+ #define TXD1 22