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RM0319 датащи(PDF) 219 Page - STMicroelectronics

номер детали RM0319
подробное описание детали  SPEAr320S architecture and functionality
PDF  368 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

RM0319 датащи(HTML) 219 Page - STMicroelectronics

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RM0319
Asynchronous serial ports (UART)
Doc ID 022640 Rev 3
219/368
16.3
Functional description
This chapter describes the main interfaces of the UART block.
Figure 79 shows the UART block diagram.
Figure 79.
UART block diagram
Note:
Applicable for UART0 - UART1 (only for two modes)
16.3.1
APB Interface
The APB Interface block generates read and write decodes for accesses to control and
status registers (CSRs) as well as to transmit/receive FIFO memories.
16.3.2
Register Block
The Register Block allows to store data written, or to be read across the APB Interface.
nUARTRST
PCLK
PRESETn
PSEL
PENABLE
PWRITE
PADDR[11:2]
PWDATA[15:0]
PRDATA[15:0]
UARTCLK
APB interface
and register
block
UARTRXDMACLR
UARTTXDMACLR
UARTRXDMASREQ
UARTRXDMABREQ
UARTTXDMASREQ
UARTTXDMABREQ
DMA
Interface
FIFO status
and interrupt
generation
UARTTXINTR
UARTRXINTR
UARTMSINTR
UARTRTINTR
UARTEINTR
UARTINTR
nUARTCTS
nUARTRI
nUARTDSR
nUARTDCD
nUARTDTR
nUARTRTS
nUARTOUT1
nUARTOUT2
16x12
Receive
FIFO
Transmitter
Receiver
UARTTXD
UARTRXD
16x8
Transmit
FIFO
Baud rate
generator
FIFO
flags
Transmit
FIFO
status
Receiv
FIFO
status
Baud rate divisor
Control and status
Baud16
txd[7:0]
rxd[11:0]
Read data[11:0]
Write data[7:0]
Note 1



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