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UM10503
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© NXP B.V. 2015. All rights reserved.
User manual
Rev. 2.1 — 10 December 2015
1120 of 1441
NXP Semiconductors
UM10503
Chapter 40: LPC43xx/LPC43Sxx USART0_2_3
Fig 127. USART block diagram
Transmitter
Shift
Register
Transmitter
Holding
Register
Transmitter
FIFO
Transmitter
Receiver
Shift
Register
Receiver
Buffer
Register
Receiver
FIFO
Receiver
TX_DMA_REQ
TX_DMA_CLR
RX_DMA_REQ
RX_DMA_CLR
Transmitter
DMA
Interface
Receiver
DMA
Interface
PCLK
Line Control
& Status
FIFO Control
& Status
TXD
RXD
BAUD
RS485, IrDA,
& Auto-baud
interrupt
Interrupt
Control &
Status
UCLK
CSRC
Baud Rate/Clock Generator
Fractional
Rate
Divider
Main
Divider
(DLM, DLL)
UCLK
OUT
UCLK
IN