參數(shù)資料
型號: XR17C158
廠商: Exar Corporation
英文描述: PCI Bus Octal UART(八通用異步接收器/發(fā)送器(滿足通訊系統(tǒng)中PCI總線和高帶寬要求))
中文描述: PCI總線八路的UART(八通用異步接收器/發(fā)送器(滿足通訊系統(tǒng)中的PCI總線和高帶寬要求))
文件頁數(shù): 27/51頁
文件大?。?/td> 685K
代理商: XR17C158
XR17C158
PCI BUS OCTAL UART
PRELIMINARY
REV. 1.0.0
27
.
T
ABLE
10: UART CHANNEL CONFIGURATION REGISTERS.
A
DDRESS
R
EGISTER
R
EAD
/W
RITE
C
OMMENTS
A3 A2 A1 A0
16550 C
OMPATIBLE
0 0 0 0
RHR - Receive Holding Reg
THR - Transmit Holding Register
DLL - Div Latch Low
DLM - Div Latch High
IER - Interrupt Enable Reg
ISR - Interrupt Status Reg
FCR - FIFO Control Reg
LCR - Line Control Reg
MCR - Modem Control Reg
LSR - Line Status Reg
reserved
MSR - Modem Status Reg
reserved
SPR - Scratch Pad Reg
Read-only
Write-only
Read/Write
Read/Write
Read/Write
Read-only
Write-only
Read/Write
Read/Write
Read-only
Write-only
Read-only
Write-only
Read/Write
LCR[7] = 0
0 0 0 0
0 0 0 1
0 0 0 1
0 0 1 0
LCR[7] = 1
LCR[7] = 1
LCR[7] = 0
0 0 1 1
0 1 0 0
0 1 0 1
0 1 1 0
0 1 1 1
E
NHANCED
R
EGISTER
1 0 0 0
1 0 0 1
1 0 1 0
FCTR
EFR - Enhanced Function Reg
TXCNT - Transmit FIFO Level Counter
TXTRG - Transmit FIFO Trigger Level
RXCNT - Receive FIFO Level Counter
RXTRG - Receive FIFO Trigger Level
Xoff-1 - Xoff Character 1
Xchar
Read/Write
Read/Write
Read-only
Write-only
Read-only
Write-only
Write-only
Read-only
1 0 1 1
1 1 0 0
Xon,Xoff Rcvd.
Flags
1 1 0 1
Xoff-2 - Xoff Character 2
reserved
Xon-1 - Xon Character 1
reserved
Xon-2 - Xon Character 2
reserved
Write-only
Read-only
Write-only
Read-only
Write-only
Read-only
1 1 1 0
1 1 1 1
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