REV. 1.1.0 These bits select the data sampling rate. By default, the data sampling rate is 16X. The" />
參數(shù)資料
型號(hào): XR20M1170IL28-F
廠商: Exar Corporation
文件頁(yè)數(shù): 32/56頁(yè)
文件大?。?/td> 0K
描述: IC UART FIFO I2C/SPI 64B 28QFN
產(chǎn)品變化通告: XR(16L580IL28, XR20M1170IL28)(TR)-F Obsolescence 2/May/2011
標(biāo)準(zhǔn)包裝: 490
特點(diǎn): *
通道數(shù): 1,UART
FIFO's: 64 字節(jié)
規(guī)程: RS485
電源電壓: 2.25 V ~ 3.6 V
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:
帶CMOS:
安裝類型: 表面貼裝
封裝/外殼: 28-VFQFN 裸露焊盤
供應(yīng)商設(shè)備封裝: 28-QFN 裸露焊盤(5x5)
包裝: 托盤
XR20M1170
38
I2C/SPI UART WITH 64-BYTE FIFO
REV. 1.1.0
These bits select the data sampling rate. By default, the data sampling rate is 16X. The maximum data rate will
double if the 8X mode is selected and will quadruple if the 4X mode is selected. See Table 14 below.
TABLE 14: SAMPLING RATE SELECT
SAMPLING RATE
0
16X
0
1
8X
1
X
4X
DLD[7:6]: Reserved
4.21
Enhanced Feature Register (EFR)
Enhanced features are enabled or disabled using this register. Bit 0-3 provide single or dual consecutive
character software flow control selection (see Table 15). 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[3:0]: Software Flow Control Select
Single character and dual sequential characters software flow control is supported. Combinations of software
flow control can be selected by programming these bits.
TABLE 15: SOFTWARE FLOW CONTROL FUNCTIONS
EFR BIT-3
CONT-3
EFR BIT-2
CONT-2
EFR BIT-1
CONT-1
EFR BIT-0
CONT-0
TRANSMIT AND RECEIVE SOFTWARE FLOW CONTROL
0
No TX and RX flow control (default and reset)
0
X
No transmit flow control
1
0
X
Transmit Xon1, Xoff1
0
1
X
Transmit Xon2, Xoff2
1
X
Transmit Xon1 and Xon2, Xoff1 and Xoff2
X
0
No receive flow control
X
1
0
Receiver compares Xon1, Xoff1
X
0
1
Receiver compares Xon2, Xoff2
1
0
1
Transmit Xon1, Xoff1
Receiver compares Xon1 or Xon2, Xoff1 or Xoff2
0
1
Transmit Xon2, Xoff2
Receiver compares Xon1 or Xon2, Xoff1 or Xoff2
1
Transmit Xon1 and Xon2, Xoff1 and Xoff2,
Receiver compares Xon1 and Xon2, Xoff1 and Xoff2
0
1
No transmit flow control,
Receiver compares Xon1 and Xon2, Xoff1 and Xoff2
DLD[5]
DLD[4]
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