参数资料
型号: XR17V354IB-E4-EVB
厂商: Exar Corporation
文件页数: 35/66页
文件大小: 0K
描述: EVAL BRD FOR XR17V354-E4 176BGA
产品培训模块: PCIe UARTs
标准包装: 1
主要目的: 接口,UART
嵌入式:
已用 IC / 零件: XR17V354
已供物品:
其它名称: 1016-1612
XR17V354IB-E4-EVB-ND
XR17V354
40
HIGH PERFORMANCE QUAD PCI-EXPRESS UART
REV. 1.0.3
3.5
UART CHANNEL CONFIGURATION REGISTERS
Address lines A0 to A3 select the 16 registers in each channel. The first 8 registers are 16550 compatible with
EXAR enhanced feature registers located on the upper 8 addresses.
TABLE 13: UART CHANNEL CONFIGURATION REGISTERS
ADDRESS
REGISTER
READ/WRITE
COMMENTS
A3 A2 A1 A0
16550 COMPATIBLE
0 0 0 0
RHR - Receive Holding Register
THR - Transmit Holding Register
Read-only
Write-only
LCR[7] = 0
0 0 0 0
DLL - Divisor LSB
Read/Write
LCR[7] = 1
0 0 0 1
DLM - Divisor MSB
Read/Write
LCR[7] = 1
0 0 1 0
DLD - Divisor Fractional
Read/Write
LCR[7] = 1
0 0 0 1
IER - Interrupt Enable Register
Read/Write
LCR[7] = 0
0 0 1 0
ISR - Interrupt Status Register
FCR - FIFO Control Register
Read-only
Write-only
LCR[7] = 0
0 0 1 1
LCR - Line Control Register
Read/Write
0 1 0 0
MCR - Modem Control Register
Read/Write
0 1 0 1
LSR - Line Status Register
Read-only
0 1 1 0
MSR - Modem Status Register
- Auto RS485 Delay
Read-only
Write-only
EFR bit-4 = 1
0 1 1 1
SPR - Scratch Pad Register
Read/Write
ENHANCED REGISTER
1 0 0 0
FCTR - Feature Control Register
Read/Write
1 0 0 1
EFR - Enhanced Function Register
Read/Write
1 0 1 0
TXCNT - Transmit FIFO Level Counter
TXTRG - Transmit FIFO Trigger Level
Read-only
Write-only
1 0 1 1
RXCNT - Receive FIFO Level Counter
RXTRG - Receive FIFO Trigger Level
Read-only
Write-only
1 1 0 0
Xoff-1 - Xoff Character 1
Xchar
Write-only
Read-only
Xon,Xoff Rcvd.
Flags
1 1 0 1
Xoff-2 - Xoff Character 2
Write-only
1 1 1 0
Xon-1 - Xon Character 1
Write-only
1 1 1 1
Xon-2 - Xon Character 2
Write-only
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