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The PrimeCell UART is an AMBA compliant SoC peripheral that is developed, tested, and licensed by ARM Limited. There are three UARTs in the ARM926PXP development chip. The 24MHz reference clock to the UARTs come from the crystal oscillator that is part of OSC0.
Table 4.51. UART implementation
| Property | Value |
|---|---|
| Location | ARM926PXP development chip for UART 0-2 |
| Memory base address | 0x101F1000 for UART00x101F2000 for
UART10x101F3000 for UART2 |
| Interrupt | 12 on PIC for UART0 13 on PIC for UART1 14 on PIC for UART2 |
| DMA | 15 UART0 Tx 14 UART0 Rx 13 UART1 Tx 12 UART1 Rx 11 UART2 Tx 10 UART2 Rx |
| Release version | ARM UART PL011 r1p3 |
| Reference documentation | ARM PrimeCell UART (PL011) Technical Reference Manual (see also UART interface) |
The following key parameters are programmable:
communication baud rate, integer, and fractional parts
number of data and stop bits
parity mode
FIFO enable (16 deep) or disable (1 deep)
FIFO trigger levels selectable between 1/8, 1/4, 1/2, 3/4, and 7/8
UART or IrDA protocol
hardware flow control.
| Copyright © 2004-2011 ARM Limited. All rights reserved. | ARM DUI 0225D |
| Non-Confidential | |
| PDF version | |
| Home > Programmer’s Reference > UART |