参数资料
型号: XR17D152CMTR-F
厂商: Exar Corporation
文件页数: 66/68页
文件大小: 0K
描述: IC UART PCI BUS DUAL 100TQFP
标准包装: 1,000
特点: *
通道数: 2,DUART
FIFO's: 64 字节
规程: RS485
电源电压: 3.3V,5V
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:
安装类型: 表面贴装
封装/外壳: 100-TQFP
供应商设备封装: 100-TQFP(14x14)
包装: 带卷 (TR)
á
XR17D152
REV. 1.2.0
UNIVERSAL (3.3V AND 5V) PCI BUS DUAL UART
7
1.0
APPLICATION EXAMPLES
The XR17D152 is designed to operate with VCC (voltage to the UART Core Logic) greater than or equal to
VIO. For a universal add-in card, it is usually unknown whether it will be plugged into a 3.3V or 5V PCI slot,
therefore VCC must be 5V to guarantee proper functionality in any PCI slot as shown in Figure 3. In an
embedded system, the designer can choose to use a 3.3V or 5V power supply for the UART core voltage. Of
course, the core voltage can be 3.3V only when the VIO is 3.3V.
In Figure 4, examples 1-3 show valid
applications of the XR17D152 in an embedded system.
FIGURE 3. TYPICAL APPLICATION FOR A UNIVERSAL ADD-IN CARD
PCI
Local
Bus
Interface
UART Channel 1
UART Channel 0
UART Core Logic
VCC = 5V
VIO
(3.3V or 5V)
CLK
(up to 33.34MHz)
M ax Crystal Frequency = 24M Hz
M ax External Clock = 50MHz
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