REV. 1.0.2 66MHZ PCI BUS OCTAL UART WITH POWER MANAGEMENT SUPPORT FCTR[4]: Infrared RX Input Logic Select " />
參數(shù)資料
型號(hào): XR17V258IV-F
廠商: Exar Corporation
文件頁(yè)數(shù): 51/69頁(yè)
文件大?。?/td> 0K
描述: IC UART PCI BUS OCTAL 144LQFP
標(biāo)準(zhǔn)包裝: 60
特點(diǎn): *
通道數(shù): 8
FIFO's: 64 字節(jié)
規(guī)程: RS485
電源電壓: 3.3V,5V
帶自動(dòng)流量控制功能:
帶IrDA 編碼器/解碼器:
帶故障啟動(dòng)位檢測(cè)功能:
帶調(diào)制解調(diào)器控制功能:
安裝類型: 表面貼裝
封裝/外殼: 144-LQFP
供應(yīng)商設(shè)備封裝: 144-LQFP(20x20)
包裝: 托盤
其它名稱: 1016-1470
XR17V258IV-F-ND
XR17V258
55
REV. 1.0.2
66MHZ PCI BUS OCTAL UART WITH POWER MANAGEMENT SUPPORT
FCTR[4]: Infrared RX Input Logic Select
Logic 0 = Select RX input as active HIGH encoded IrDA data, normal, (default).
Logic 1 = Select RX input as active LOW encoded IrDA data, inverted.
FCTR [3:0] - Auto RTS/DTR Flow Control Hysteresis Select
These bits select the auto RTS/DTR flow control hysteresis and only valid when TX and RX Trigger Table-D is
selected (FCTR bit [7:6] are set to logic 1). The RTS/DTR hysteresis is referenced to the RX FIFO trigger level.
After reset, these bits are set to logic 0 selecting the next FIFO trigger level for hardware flow control. Table 20
below shows the 16 selectable hysteresis levels.
TABLE 20: 16 SELECTABLE HYSTERESIS LEVELS WHEN TRIGGER TABLE-D IS SELECTED
FCTR BIT [3]
FCTR BIT [2]
FCTR BIT [1]
FCTR BIT [0]
RTS/DTR HYSTERESIS
(CHARACTERS)
0
1
+/- 4
0
1
0
+/- 6
0
1
+/- 8
0
1
0
+/- 8
0
1
0
1
+/- 16
0
1
0
+/- 24
0
1
+/- 32
1
0
+/- 12
1
0
1
+/- 20
1
0
+/- 28
1
+/- 36
1
0
+/- 40
1
0
1
+/- 44
1
0
1
0
+/- 48
1
0
1
+/- 52
5.14
Enhanced Feature Register (EFR) - Read/Write
Enhanced features are enabled or disabled using this register. Bits [3:0] provide single or dual consecutive
character software flow control selection (see Table 21). When the Xon1 and Xon2 and Xoff1 and Xoff2 modes
are selected, the double 8-bit words are concatenated into two sequential characters. Caution: note that
whenever changing the TX or RX flow control bits, always reset all bits back to logic 0 (disable) before
programming a new setting.
EFR[7]: Auto CTS Flow Control Enable
Automatic CTS or DSR Flow Control.
Logic 0 = Automatic CTS/DSR flow control is disabled (default).
Logic 1 = Enable Automatic CTS/DSR flow control. Transmission stops when CTS/DSR# pin de-asserts
(HIGH). Transmission resumes when CTS/DSR# pin is asserted (LOW). The selection for CTS# or DSR# is
through MCR bit [2].
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