REV. 1.0.3 MCR[3]: INT Output Enable Enable or disable INT outputs to become active " />
參數(shù)資料
型號： XR16V554IL-F
廠商： Exar Corporation
文件頁數(shù)： 19/43頁
文件大?。?/td> 0K
描述： IC UART FIFO 16B QUAD 48QFN
標準包裝： 260
特點： *
通道數(shù)： 4，QUART
FIFO's： 16 字節(jié)
規(guī)程： RS232
電源電壓： 2.25 V ~ 3.6 V
帶自動流量控制功能： 是
帶故障啟動位檢測功能： 是
帶調(diào)制解調(diào)器控制功能： 是
帶CMOS： 是
安裝類型： 表面貼裝
封裝/外殼： 48-VFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝： 48-QFN-EP（7x7）
包裝： 托盤
其它名稱： 1016-1466
XR16V554IL-F-ND
XR16V554/554D
26
2.25V TO 3.6V QUAD UART WITH 16-BYTE FIFO
REV. 1.0.3
MCR[3]: INT Output Enable
Enable or disable INT outputs to become active or in three-state. This function is associated with the INTSEL
input, see below table for details. This bit is also used to control the OP2# signal during internal loopback
mode. INTSEL pin must be LOW during 68 mode.
Logic 0 = INT (A-D) outputs disabled (three state) in the 16 mode (default). During internal loopback mode,
OP2# is HIGH.
Logic 1 = INT (A-D) outputs enabled (active) in the 16 mode. During internal loopback mode, OP2# is LOW.
TABLE 12: INT OUTPUT MODES
PIN
BIT-3
INT A-D OUTPUTS IN 16 MODE
0
Three-State
0
1
Active
1
X
Active
MCR[4]: Internal Loopback Enable
Logic 0 = Disable loopback mode (default).
Logic 1 = Enable local loopback mode, see loopback section and Figure 11.
MCR[7:5]: Reserved
4.8
Line Status Register (LSR) - Read/Write
This register is writeable but it is not recommended. The LSR provides the status of data transfers between the
UART and the host. If IER bit-2 is enabled, LSR bit-1 will generate an interrupt immediately and LSR bits 2-4
will generate an interrupt when a character with an error is in the RHR.
LSR[0]: Receive Data Ready Indicator
Logic 0 = No data in receive holding register or FIFO (default).
Logic 1 = Data has been received and is saved in the receive holding register or FIFO.
LSR[1]: Receiver Overrun Flag
Logic 0 = No overrun error (default).
Logic 1 = Overrun error. A data overrun error condition occurred in the receive shift register. This happens
when additional data arrives while the FIFO is full. In this case the previous data in the receive shift register
is overwritten. Note that under this condition the data byte in the receive shift register is not transferred into
the FIFO, therefore the data in the FIFO is not corrupted by the error.
LSR[2]: Receive Data Parity Error Tag
Logic 0 = No parity error (default).
Logic 1 = Parity error. The receive character in RHR does not have correct parity information and is suspect.
This error is associated with the character available for reading in RHR.
LSR[3]: Receive Data Framing Error Tag
Logic 0 = No framing error (default).
Logic 1 = Framing error. The receive character did not have a valid stop bit(s). This error is associated with
the character available for reading in RHR.
INTSEL
MCR
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XR16V554IV 制造商:Rochester Electronics LLC 功能描述: 制造商:Exar Corporation 功能描述:
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XR16V554IV80 制造商:EXAR 制造商全稱:EXAR 功能描述:2.25V TO 3.6V QUAD UART WITH 16-BYTE FIFO
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