參數(shù)資料
型號: XR17V254IV-0A-EVB
廠商: Exar Corporation
文件頁數(shù): 39/70頁
文件大小: 0K
描述: EVAL BOARD FOR XR17V254 144LQFP
標(biāo)準(zhǔn)包裝: 1
系列: *
XR17V254
44
66MHZ PCI BUS QUAD UART WITH POWER MANAGEMENT SUPPORT
REV. 1.0.1
FCR[3]: DMA Mode Select
This bit has no effect since TXRDY and RXRDY pins are not available in this device. It is provided for legacy
software compatibility.
Logic 0 = Set DMA to mode 0 (default).
Logic 1 = Set DMA to mode 1.
FCR[2]: TX FIFO Reset
This bit is only active when FCR bit [0] is active.
Logic 0= No transmit FIFO reset (default).
Logic 1 = Reset the transmit FIFO pointers and FIFO level counter logic (the transmit shift register is not
cleared or altered). This bit will return to a logic 0 after resetting the FIFO.
FCR[1]: RX FIFO Reset
This bit is only active when FCR bit [0] is active.
Logic 0 = No receive FIFO reset (default).
Logic 1 = Reset the receive FIFO pointers and FIFO level counter logic (the receive shift register is not
cleared or altered). This bit will return to a logic 0 after resetting the FIFO.
FCR[0]: TX and RX FIFO Enable
Logic 0 = Disable the transmit and receive FIFO (default).
Logic 1 = Enable the transmit and receive FIFOs. This bit must be set to logic 1 when other FCR bits are
written or they will not be programmed.
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