ARM SCI LPC2292 - LPC2292 Universal Asynchronous Receiver...

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LPC2292 Universal Asynchronous Receiver Transmitter (UART) Two UARTs on LPC2292 UART0: TxD0, RxD0 , UART1: TxD1,RxD1 Pins: P0.0 P0.1 P0.8 P0.9 Asynchronous serial communications protocol Conforms to “550 industry standard specification” Built-in, programmable baud rate generator 16-byte transmit/receive FIFO 5-to-8 bit data formats Programmable parity checking/transmission Interrupt-driven operation available LPC2292 User Manual - Chapters 10/11 UART0/1)
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UART0 block diagram Transmitter ready Transmitted data Receiver ready Received data Interrupt request Baud rate generator VPB clock 16x baud rate = pclk/DLM:DLL
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RxD,TxD pins Select RxD, TxD pin functions in pin connect block register PINSEL0 (0xE002C000) (Configures pins P0.0 P0.15) PINSEL0(1:0): 00 for GPIO P0.0, 01 for TxD0 PINSEL0(3:2): 00 for GPIO P0.1, 01 for RxD0 PINSEL0(17:16): 00 for GPIO P0.8, 01 for TxD1 PINSEL0(19:18): 00 for GPIO P0.9, 01 for RxD1 LPC2292 User Manual Chapter 8
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UART0 Register Map All 8 bits – “unsigned char” in lpc22xx.h
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UART0 data registers Receiver buffer register (RBR)
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