TABLE 14: UART CHANNEL CONFIGURATION REGISTERS. A
參數(shù)資料
型號: XR17V258IV-0A-EVB
廠商: Exar Corporation
文件頁數(shù): 33/69頁
文件大小: 0K
描述: EVAL BOARD FOR XR17V258 144LQFP
標準包裝: 1
系列: *
TABLE 14: 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 Part
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
0 1 1 1
SPR - Scratch Pad Register
Read/Write
ENHANCED REGISTER
1 0 0 0
FCTR
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
XR17V258
39
REV. 1.0.2
66MHZ PCI BUS OCTAL UART WITH POWER MANAGEMENT SUPPORT
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