XR17V352IB113-F (Exar) PDF资料下载 Datasheet(5/64 页)

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参数资料

XR17V352

REV. 1.0.3

HIGH PERFORMANCE DUAL PCI EXPRESS UART

1.3

Device Internal Register Sets

The Device Configuration Registers and the two individual UART Configuration Registers of the V352

occupy 2K of PCI bus memory address space. These addresses are offset onto the basic memory address, a

value loaded into the Memory Base Address Register (BAR) in the PCI local bus configuration register set. The

UART Configuration Registers are mapped into 2 address blocks where each UART channel occupies 1024

bytes memory space for its own registers that include the 16550 compatible registers. The Device

Configuration Registers are accessible from both UART channels. However, not all bits can be controlled by

both channels. The UART channel can only control the 8XMODE, 4XMODE, RESET and SLEEP register bits

that apply to that particular channel. For example, this prevents channel 0 from accidentally resetting channel

All these registers can be accessed in 8, 16, 24 or 32 bits width depending on the starting address given by the

host at the beginning of the bus cycle. Transmit and receive data may be loaded or unloaded in 8, 16, 24 or 32

bits format in special locations given in the Table 4 below. Every time a read or write operation is made to the

transmit or receive register, its FIFO data pointer is automatically bumped to the next sequential data location

either in byte, word or DWORD. One special case applies to the receive data unloading when reading the

receive data together with its LSR register content. The host must read them in 16 or 32 bits format in order to

maintain integrity of the data byte with its associated error flags. These special registers are further discussed

in “Section 2.1, FIFO DATA LOADING AND UNLOADING IN 32-BIT FORMAT” on page 28.

相关代理商/技术参数	参数描述
XR17V354	制造商:EXAR 制造商全称:EXAR 功能描述:HIGH PERFORMANCE QUAD PCI-EXPRESS UART
XR17V354IB-0A-EVB	功能描述:界面开发工具 Eval Board for XR17V354IB-0A RoHS:否制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压:3.3 V
XR17V354IB176-F	功能描述:UART 接口集成电路 4 Channel PCIe UART w/256 Byte FIFO RoHS:否制造商:Texas Instruments 通道数量:2 数据速率:3 Mbps 电源电压-最大:3.6 V 电源电压-最小:2.7 V 电源电流:20 mA 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:LQFP-48 封装:Reel
XR17V354IB-E4-EVB	功能描述:界面开发工具 Eval Board for XR17V354IB-E4 RoHS:否制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压:3.3 V
XR17V354IB-E8-EVB	功能描述:界面开发工具 Eval Board for XR17V354IB-E8 RoHS:否制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压:3.3 V

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