REV. 1.0.2 HIGH PERFORMANCE DUART WITH 32-BYTE FIFO AND POWERSAVE FEATURE FCR[1]: RX FIFO Reset This bit is only active when FCR b" />
參數(shù)資料
型號： XR16V2651IM-0B-EB
廠商： Exar Corporation
文件頁數(shù)： 22/51頁
文件大小： 0K
描述： EVAL BOARD FOR V2651 48TQFP
標(biāo)準(zhǔn)包裝： 1
系列： *
XR16V2651
29
REV. 1.0.2
HIGH PERFORMANCE DUART WITH 32-BYTE FIFO AND POWERSAVE FEATURE
FCR[1]: RX FIFO Reset
This bit is only active when FCR bit-0 is a ‘1’.
Logic 0 = No receive FIFO reset (default)
Logic 1 = Reset the receive FIFO pointers (the receive shift register is not cleared or altered). This bit will
return to a logic 0 after resetting the FIFO.
FCR[2]: TX FIFO Reset
This bit is only active when FCR bit-0 is a ‘1’.
Logic 0 = No transmit FIFO reset (default).
Logic 1 = Reset the transmit FIFO pointers (the transmit shift register is not cleared or altered). This bit will
return to a logic 0 after resetting the FIFO.
FCR[3]: DMA Mode Select
Controls the behavior of the TXRDY# and RXRDY# pins. See DMA operation section for details.
Logic 0 = Normal Operation (default).
Logic 1 = DMA Mode.
FCR[5:4]: Transmit FIFO Trigger Select (requires EFR bit-4=1)
(logic 0 = default, TX trigger level = 1)
These 2 bits set the trigger level for the transmit FIFO. The UART will issue a transmit interrupt when the
number of characters in the FIFO falls below the selected trigger level, or when it gets empty in case that the
FIFO did not get filled over the trigger level on last re-load. Table 12 below shows the selections. EFR bit-4
must be set to ‘1’ before these bits can be accessed.
FCR[7:6]: Receive FIFO Trigger Select
(logic 0 = default, RX trigger level =1)
These 2 bits are used to set the trigger level for the receive FIFO. The UART will issue a receive interrupt when
the number of the characters in the FIFO crosses the trigger level. Table 12 shows the complete selections.
Whichever selection is made last applies to both the RX and TX side.
4.6
Line Control Register (LCR) - Read/Write
The Line Control Register is used to specify the asynchronous data communication format. The word or
character length, the number of stop bits, and the parity are selected by writing the appropriate bits in this
register.
TABLE 12: TRANSMIT AND RECEIVE FIFO TRIGGER TABLE AND LEVEL SELECTION
FCR
BIT-7
FCR
BIT-6
FCR
BIT-5
FCR
BIT
-4
RECEIVE
TRIGGER LEVEL
TRANSMIT
TRIGGER
LEVEL
0
1
0
1
0
1
0
1
0
1
0
1
8
16
24
28
16
8
24
30
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參數(shù)描述
XR16V2651IM-F 功能描述:UART 接口集成電路 UART RoHS:否 制造商:Texas Instruments 通道數(shù)量:2 數(shù)據(jù)速率:3 Mbps 電源電壓-最大:3.6 V 電源電壓-最小:2.7 V 電源電流:20 mA 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:LQFP-48 封裝:Reel
XR16V2651IMTR-F 制造商:Exar Corporation 功能描述:UART 2-CH 32Byte FIFO 2.5V/3.3V 48-Pin TQFP T/R 制造商:Exar Corporation 功能描述:XR16V2651IMTR-F
XR16V2652 制造商:EXAR 制造商全稱:EXAR 功能描述:HIGH PERFORMANCE DUART WITH 32-BYTE FIFO
XR16V2652_07 制造商:EXAR 制造商全稱:EXAR 功能描述:HIGH PERFORMANCE DUART WITH 32-BYTE FIFO
XR16V2652IJ 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述:
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