Table 11
參數(shù)資料
型號: XR16C864IQTR-F
廠商: Exar Corporation
文件頁數(shù): 32/51頁
文件大小: 0K
描述: IC UART FIFO 128B QUAD 100QFP
標準包裝: 500
特點: *
通道數(shù): 4,QUART
FIFO's: 128 字節(jié)
規(guī)程: RS232,RS485
電源電壓: 2.97 V ~ 5.5 V
帶自動流量控制功能:
帶IrDA 編碼器/解碼器:
帶故障啟動位檢測功能:
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: 100-BQFP
供應(yīng)商設(shè)備封裝: 100-QFP(14x20)
包裝: 帶卷 (TR)
XR16C864
38
2.97V TO 5.5V QUAD UART WITH 128-BYTE FIFO
REV. 2.2.0
FCTR[5:4]: Transmit/Receive Trigger Table Select
See
Table 11 for more details.
FCTR[6]: Scratchpad Swap
Logic 0 = Scratch Pad register is selected as general read and write register. ST16C550 compatible mode.
Logic 1 = FIFO Count register (Read-Only), Enhanced Mode Select Register (Write-Only). Number of
characters in transmit or receive holding register can be read via scratch pad register when this bit is set.
Enhanced Mode Select Register is selected when it is written into.
FCTR[7]: Programmable Trigger Register Select
Logic 0 = Registers TRG and FC selected for RX.
Logic 1 = Registers TRG and FC selected for TX.
4.19
Enhanced Feature Register (EFR) - Read/Write
Enhanced features are enabled or disabled using this register. Bit 0-3 provide single or dual consecutive
character software flow control selection (see
Table 18). 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.
TABLE 17: TRIGGER TABLE SELECT
FCTR
BIT-5
FCTR
BIT-4
TABLE
0
Table-A (TX/RX)
0
1
Table-B (TX/RX)
1
0
Table-C (TX/RX)
1
Table-D (TX/RX)
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