Integrator®/CP User Guide 4.8.5. Overview of UART registers

4.8.5. Overview of UART registers

The UART registers are listed in Table 4.17. For more detailed information, refer to the ARM PrimeCell UART (PL011) Technical Reference Manual. The base addresses for the UARTs are:

0x16000000: UART0, the top port on the connector, also called serial A.
0x17000000: UART1, the bottom port on the connector, also called serial B.

Table 4.17. UART register summary

Address (UART 0)^[1]	Type	Width	Reset value	Name	Description
`0x16000000`	Read/write	12/8	`0x`---	UARTDR	Data read or written from the interface. It is 12 bits wide on a read, and 8 on a write. This is also the UART base address.
`0x16000004`	Read/write	4/0	`0x0`	UARTRSR/ UARTECR	Receive status register (read)/ error clear register (write).
`0x16000008`- `0x1600014`	-	-	-	-	Reserved.
`0x16000018`	Read	9	`b-10010`---	UARTFR	Flag register (read only).
`0x1600001C`	-	-	-	-	Reserved.
`0x16000020`	Read/write	8	`0x00`	UARTILPR	IrDA low-power counter register.
`0x16000024`	Read/write	16	`0x0000`	UARTIBRD	Integer baud rate divisor register.
`0x160000028`	Read/write	6	`0x00`	UARTFBRD	Fractional baud rate divisor register.
`0x1600002C`	Read/write	8	`0x00`	UARTLCR_H	Line control register, HIGH byte.
`0x16000030`	Read/write	16	`0x0300`	UARTCR	Control register.
`0x16000034`	Read/write	6	`0x12`	UARTIFLS	Interrupt FIFO level select register.
`0x16000038`	Read/write	11	`0x000`	UARTIMSC	Interrupt mask set/clear.
`0x1600003C`	Read	11	`0x00`-	UARTRIS	Raw interrupt status.
`0x16000040`	Read	11	`0x00`-	UARTMIS	Masked interrupt status.
`0x16000044`	Write	11	-	UARTICR	Interrupt clear register.
`0x16000048`	Read/write	3	`0x00`	UARTDMACR	DMA control register.
`0x1600004C`- `1600007C`	-	-	-	-	Reserved.
`0x16000080`- `0x16000008C`	-	-	-	-	Reserved (for test purposes).
`0x16000090`- `0x16000FCC`	-	-	-	-	Reserved.
`0x16000FD0`- 0x16000`FDC`	-	-	-	-	Reserved for future ID expansion.
`0x16000FE0`	Read	8	`0x11`	UARTPeriphID0	Peripheral identification register bits [7:0].
`0x16000FE4`	Read	8	`0x10`	UARTPeriphID1	Peripheral identification register bits [15:8].
`0x16000FE8`	Read	8	`0x14`	UARTPeriphID2	Peripheral identification register bits [23:16].
`0x16000FEC`	Read	8	`0x00`	UARTPeriphID3	Peripheral identification register bits [31:24].
`0x16000FF0`	Read	8	`0x0D`	UARTPCellID0	PrimeCell identification register bits [7:0].
`0x16000FF4`	Read	8	`0xF0`	UARTPCellID1	PrimeCell identification register bits [15:8].
`0x16000FF8`	Read	8	`0x05`	UARTPCellID2	PrimeCell identification register bits [23:16].
`0x16000FFC`	Read	8	`0xB1`	UARTPCellID3	PrimeCell identification register bits [31:24].
^[1]For UART 1, use `0x17000000`, `0x17000004`, and so forth.

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