XR17V254 66 MHz PCI Bus Quad UART with Power Management Support
The XR17V254 is a single chip 8-channel 66MHz PCI (Peripheral Component Interconnect) UART (Universal Asynchronous Receiver and Transmitter) solution, optimized for higher performance and lower power. The V258 device with its fifth generation register set is designed to meet the high bandwidth and power management requirements for multi-serial communication ports for system administration and management. The 32-bit 66MHz PCI interface is compliant with PCI 3.0 and PCI power management revision 1.1 specifications. The device provides an upgrade path for Exar’s 33MHz 5V and Universal PCI UART family of products in a 144-pin LQFP package. The V258 consists of eight independent UART channels, each with set of configuration and enhanced registers, 64 bytes of Transmit (TX) and Receive (RX) FIFOs, and a fractional Baud Rate Generator (BRG). A global interrupt source register provides a complete interrupt status indication for all 8-channels to speed up interrupt parsing. The V258 device operates at 33/66MHz and features fully programmable TX and RX FIFO level triggers, automatic hardware and software flow control, and automatic RS-485 half duplex direction control output for software and hardware design simplification.
技术特性
- High performance 32-bit 66MHz PCI UART
- PCI 3.0 compliance
- PCI power management rev. 1.1 compliance
- EEPROM interface for PCI configuration
- 3.3V supply with 5V tolerant non-PCI (serial) inputs
- Data read/write burst operation
- Global interrupt register for all eight UART channels
- Up to 8 Mbps serial data rate
- Eight multi-purpose inputs/outputs
- A 16-bit general purpose timer/counter
- Sleep mode with wake-up Indicator
- Eight independent UART channels controlled with
- 16C550 compatible register Set
- 64-byte TX and RX FIFOs with level counters and programmable trigger levels
- Fractional baud rate generator
- Automatic RTS/CTS or DTR/DSR hardware flow control with programmable hysteresis
- Automatic Xon/Xoff software flow control
- RS-485 half duplex direction control output with selectable turn-around delay
- Infrared (IrDA 1.0) data encoder/decoder
- Programmable data rate with prescaler
- Pb-Free, RoHS Compliant Versions Offered
应用领域 APPLICATION
- Remote Access Servers
- Storage Network Management
- Factory Automation and Process Control
- Instrumentation
- Multi-port RS-232/RS-422/RS-485 Cards
- Point-of-Sale Systems
|
技术指标
| 中央处理器接口 |
PCI Bus 3.0 |
| 频道 |
4 |
| 数据传输速率@5/3.3/2.5V |
na/8/na |
| Max Data Rate @ 5/3.3/2.5/1.8V (Mbps) |
na/8/na/na |
| 发送器/接收器FIFO(Bytes) |
64/64 |
| 发送器/接收器FIFOCtrs |
Yes |
| Program Trigger Levels |
Yes |
| 自动RS-485 |
Yes |
| Fractional Baud Rate Gen. |
Yes |
| Pwr Down Mode |
Yes |
| 5VTol输入 |
Yes |
| 电压供应 |
3.0-3.6 |
| No. ofGPIOs |
8 |
| 封装 |
LQFP-144 |
订购信息 Ordering Information
| 器件型号 |
封装编码 |
有害物质限制 |
最低温度 |
最高温度 |
状态 |
立刻购买 |
申请样片 |
| XR17V254IV-F |
LQFP144 |
|
-40 |
85 |
Active |
|
|
| XR17V254IVTR-F |
LQFP144 |
|
-40 |
85 |
Active |
功能框图 Functional Block Diagram
|
