XR17C158 Exar Corporation, XR17C158 Datasheet - Page 27

• Manufacturer Part Number: XR17C158
• Description: Eight-channel Pci-based (UART)
• Manufacturer: Exar Corporation

XR17C158
REV. 1.0.0
.
A3 A2 A1 A0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
A
PCI BUS OCTAL UART
DDRESS
0
0
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0 0
0 0
0 1
0 1
1 0
1 1
0 0
0 1
1 0
1 1
0 0
0 1
1 0
1 1
0 0
0 1
1 0
1 1
T
ABLE
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
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
Xoff-2 - Xoff Character 2
reserved
Xon-1 - Xon Character 1
reserved
Xon-2 - Xon Character 2
reserved
10: UART CHANNEL CONFIGURATION REGISTERS.
R
EGISTER
E
16550 C
NHANCED
27
OMPATIBLE
R
EGISTER
R
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read/Write
Read-only
Write-only
Read-only
Write-only
Read-only
Write-only
Read-only
Write-only
Read-only
Write-only
Read-only
Write-only
Write-only
Read-only
Write-only
Read-only
Write-only
Read-only
Write-only
Read-only
EAD
/W
RITE
Xon,Xoff Rcvd.
C
LCR[7] = 0
LCR[7] = 1
LCR[7] = 1
LCR[7] = 0
PRELIMINARY
OMMENTS
Flags