参数资料
型号: XR16L2752CJTR-F
厂商: Exar Corporation
文件页数: 29/49页
文件大小: 0K
描述: IC UART FIFO 64B DUAL 44PLCC
标准包装: 500
特点: *
通道数: 2,DUART
FIFO's: 64 字节
规程: RS232,RS485
电源电压: 2.25 V ~ 5.5 V
带自动流量控制功能:
带IrDA 编码器/解码器:
带故障启动位检测功能:
带调制解调器控制功能:
带CMOS:
安装类型: 表面贴装
封装/外壳: 44-LCC(J 形引线)
供应商设备封装: 44-PLCC(16.59x16.59)
包装: 带卷 (TR)
xr
XR16L2752
REV. 1.2.1
2.25V TO 5.5V DUART WITH 64-BYTE FIFO
35
FCTR[5:4]: Transmit/Receive Trigger Table Select
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 FIFO 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.
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 14: 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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