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| 型号： | XR17D152CMTR-F |
| 厂商： | Exar Corporation |
| 文件页数： | 18/68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： | 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： | 100-TQFP |
| 供应商设备封装： | 100-TQFP（14x14） |
| 包装： | 带卷 (TR) |
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XR17D152
REV. 1.2.0
UNIVERSAL (3.3V AND 5V) PCI BUS DUAL UART
25
4.2
FIFO DATA LOADING AND UNLOADING THROUGH THE UART CHANNEL REGISTERS, THR
AND RHR IN 8-BIT FORMAT
The THR and RHR register address for channel 0 to channel 1 is shown in Table 8 below. The THR and RHR
for each channel 0 tand 1 are located sequentially at address 0x0000 and 0x0200. Transmit data byte is loaded
to the THR when writing to that address and receive data is unloaded from the RHR register when reading that
address. Both THR and RHR registers are 16C550 compatible in 8-bit format, so each bus operation can only
write or read in bytes.
5.0
UART
There are 2 UARTs [channels 1:0] in the D152. Each has its own 64-byte of transmit and receive FIFO, a set of
16550 compatible control and status registers, and a baud rate generator for individual channel data rate
setting. Eight additional registers per UART were added for the EXAR enhanced features.
5.1
Programmable Baud Rate Generator
Each UART has its own Baud Rate Generator (BRG) with a prescaler for the transmitter and receiver. The
prescaler is controlled by a software bit in the MCR register. The MCR register bit-7 sets the prescaler to divide
the input crystal or external clock by 1 or 4. The output of the prescaler clocks to the BRG. The BRG further
divides this clock by a programmable divisor between 1 and (216 -1) to obtain a 16X or 8X sampling clock of the
serial data rate. The sampling clock is used by the transmitter for data bit shifting and receiver for data
sampling. The BRG divisor (DLL and DLM registers) defaults to a random value upon power up. Therefore, the
BRG must be programmed during initialization to the operating data rate.
TABLE 8: TRANSMIT AND RECEIVE DATA REGISTER IN BYTE FORMAT, 16C550 COMPATIBLE
PCI Bus
Data Bit-31
B7
B6
B5
B4
B3
B2
B1
B0
B7
B6
B5
B4
B3
B2
B1
B0
B7
B6
B5
B4
B3
B2
B1
B0
B7
B6
B5
B4
B3
B2
B1
B0
Transmit Data Byte n+3
Transmit Data Byte n+2
Transmit Data Byte n+1
Transmit Data Byte n+0
PCI Bus
Data Bit-0
Channel 0 to 1 Transmit Data in 32-bit alignment through the Configuration Register Address
0x0100 and 0x0300
THR and RHR Address Locations For CH0 to CH1 (16C550 Com patible)
CH0
0x000 Write THR
CH0
0x000 Read RHR
CH1
0x200 Write THR
CH1
0x200 Read RHR
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
Bit-7
Bit-6
Bit-5
Bit-4
Bit-3
Bit-2
Bit-1
Bit-0
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相关代理商/技术参数 |
参数描述 |
|---|---|
| XR17D152IM | 制造商:EXAR 制造商全称:EXAR 功能描述:UNIVERSAL (3.3V AND 5V) PCI BUS DUAL UART |
| XR17D152IM-F | 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 |
| XR17D154 | 制造商:EXAR 制造商全称:EXAR 功能描述:UNIVERSAL (3.3V AND 5V) PCI BUS QUAD UART |
| XR17D154CV | 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 |
| XR17D154CV-0A-EVB | 功能描述:界面开发工具 Supports D154 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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