参数资料
型号: XR17C154IV
厂商: Exar Corporation
文件页数: 17/62页
文件大小: 0K
描述: IC UART PCI BUS QUAD 144LQFP
产品变化通告: Leaded UART, V&I Obsolescence 11/Apr/2011
标准包装: 60
特点: *
通道数: 4,QUART
FIFO's: 64 字节
规程: RS485
电源电压: 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: 144-LQFP
供应商设备封装: 144-LQFP(20x20)
包装: 托盘
XR17C154
xr
5V PCI BUS QUAD UART
REV. 1.3.2
24
3.2
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 3 is shown in Table 8 below. The THR and RHR
for each channel 0 to 3 are located sequentially at address 0x0000, 0x0200, 0x0400 and 0x0600. 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.
WRITE TX FIFO
BYTE 3
BYTE 2
BYTE 1
BYTE 0
Write n+0 to n+3
FIFO Data n+3
FIFO Data n+2
FIFO Data n+1
FIFO Data n+0
Write n+4 to n+7
FIFO Data n+7
FIFO Data n+6
FIFO Data n+5
FIFO Data n+4
Etc.
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
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 3 Transmit Data in 32-bit alignment through the Configuration Register Address
0x0100, 0x0300, 0x0500 and 0x0700
THR and RHR Address Locations For CH0 to CH3 (16C550 Compatible)
CH0 0x000 Write THR
CH0 0x000 Read RHR
CH1 0x200 Write THR
CH1 0x200 Read RHR
CH2 0x400 Write THR
CH2 0x400 Read RHR
CH3 0x600 Write THR
CH3 0x600 Read RHR
784THRRHR1
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
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
相关PDF资料
PDF描述
XR17C158IV-F IC UART PCI BUS OCTAL 144LQFP
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