UM10503
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© NXP B.V. 2012. All rights reserved.
User manual
Rev. 1.3 — 6 July 2012
983 of 1269
NXP Semiconductors
UM10503
Chapter 38: LPC43xx UART1
Fig 119.UART1 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
Baud Rate Generator
Fractional
Rate
Divider
Main
Divider
(DLM, DLL)
Modem
Control
&
Status
Transmitter
DMA
Interface
Receiver
DMA
Interface
PCLK
Line Control
& Status
FIFO Control
& Status
U1_TXD
U1_RXD
U1_OE
U1_CTS
U1_RTS
U1_DTR
U1_DSR
U1_RI
U1_DCD
RS485 &
Auto-baud
UART1 interrupt
Interrupt
Control &
Status