参数资料
| 型号： | XR17D154IV-F |
| 厂商： | Exar Corporation |
| 文件页数： | 7/69页 |
| 文件大小： | 0K |
| 描述： | IC UART PCI BUS QUAD 144LQFP |
| 产品培训模块： | UART Product Overview |
| 标准包装： | 60 |
| 特点： | * |
| 通道数： | 4，QUART |
| FIFO's： | 64 字节 |
| 规程： | RS485 |
| 电源电压： | 3.3V，5V |
| 带自动流量控制功能： | 是 |
| 带IrDA 编码器/解码器： | 是 |
| 带故障启动位检测功能： | 是 |
| 带调制解调器控制功能： | 是 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 144-LQFP |
| 供应商设备封装： | 144-LQFP（20x20） |
| 包装： | 托盘 |
| 其它名称： | 1016-1290 |
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xr
XR17D154
REV. 1.2.2
UNIVERSAL (3.3V AND 5V) PCI BUS QUAD UART
15
2.2.1
The Interrupt Status Register
The XR17D154 has a 32-bit wide register [INT0, INT1, INT2 and INT3] to provide interrupt information and
supports two interrupt schemes. The first scheme uses bits 0 to 3 of an 8-bit indicator (INT0) representing
channels 0 to 3 of the XR17D154, respectively. This permits the interrupt routine to quickly vector and serve
that UART channel and determine the source(s) in each individual routines. INT0 bit-0 represents the interrupt
status for UART channel 0 when its transmitter, receiver, line status, or modem port status requires service.
Other bits in the INT0 register provide indication for the other channels with bit-3 representing UART channel 4
respectively, bits 4 to 7 are reserved and remain at logic zero.
The second scheme provides detail about the source of the interrupts for each UART channel. All the interrupts
are encoded into a 3-bit code. This 3-bit code represents 7 interrupts corresponding to individual UART’s
transmitter, receiver, line status, modem port status. INT1 and INT2 registers provide the 12-bit interrupt status
for all 4 channels. Bits 8, 9 and 10 representing channel 0 and bits 17,18 and 19 representing channel 3
respectively. Bits 20 to 31 are reserved and remain at logic zero. All 4 channel interrupts status are available
with a single DWORD read operation. This feature allows the host quickly vectors and serves the interrupts,
reducing service interval, hence, reduce host bandwidth requirement. Figure 6 shows the 4-byte interrupt
register and its make up.
A special interrupt condition is generated by the 154 when it wakes up from sleep mode. This special interrupt
is cleared by reading the INT0 register. If there are not any other interrupts pending, the value read from INT0
would be 0x00.
INT0 [7:0] Channel Interrupt Indicator
Each bit gives an indication of the channel that has requested for service. Bit-0 represents channel 0 and bit-3
indicates channel 3. Logic 1 indicates that a channel has called for service. Bits 4 to 7 are reserved and remain
at logic 0 The interrupt bit clears after reading the appropriate register of the interrupting channel register, see
Interrupt Clearing section.
GLOBAL INTERRUPT REGISTER (DWORD) - [default 0x00-00-00-00]
INT3 [31:24]
INT2 [23:16]
INT1 [15:8]
INT0 [7:0]
INT0 register provides status for each channel
INT0 Register
Individual UART Channel Interrupt Status
Rsvd
Ch-3 Ch-2 Ch-1 Ch-0
Bit-7 Bit-6 Bit-5 Bit-4 Bit-3 Bit-2 Bit-1 Bit-0
Rsvd Rsvd Rsvd
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相关代理商/技术参数 |
参数描述 |
|---|---|
| XR17D154IVTR-F | 制造商:Exar Corporation 功能描述:UART 4-CH 64Byte FIFO 3.3V/5V 144-Pin LQFP T/R 制造商:Exar Corporation 功能描述:XR17D154IVTR-F |
| XR17D158 | 制造商:EXAR 制造商全称:EXAR 功能描述:UNIVERSAL (3.3V AND 5V) PCI BUS OCTAL UART |
| XR17D158_05 | 制造商:EXAR 制造商全称:EXAR 功能描述:UNIVERSAL (3.3V AND 5V) PCI BUS OCTAL UART |
| XR17D158CV | 功能描述:UART 接口集成电路 UART 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 |
| XR17D158CV-0A-EVB | 功能描述:界面开发工具 Supports D158 144 ld TQFP, PCI Interface 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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