xr16m698 Exar Corporation, xr16m698 Datasheet - Page 31

• Manufacturer Part Number: xr16m698
• Description: 1.62v To 3.63v High Performance Octal Uart With 32-byte Fifo
• Manufacturer: Exar Corporation

REV. 1.0.0
The first 8 registers are 16550 compatible with EXAR enhanced feature registers located on the upper 8
addresses. The 8 sets of UART configuration registers are decoded using address lines A0 to A3 as shown
below.
3.2
UART Channel Configuration Registers
A3 A2 A1 A0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
A
DDRESS
0
0
0
0
0
0
0
1
1
1
1
0
0
0
0
1
1
1
1
0 0
0 0
0 1
1 0
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
RHR - Receive Holding Reg
THR - Transmit Holding Register
DLL - Divisor LSB
DLM - Divisor MSB
DLD - Divisor Fractional Part
IER - Interrupt Enable Reg
ISR - Interrupt Status Reg
FCR - FIFO Control Reg
LCR - Line Control Reg
MCR - Modem Control Reg
LSR - Line Status Reg
MSR - Modem Status Reg
SPR - Scratch Pad Reg
FCTR
EFR - Enhanced Function Reg
Reserved
Reserved
Xoff-1 - Xoff Character 1
Xchar
Xoff-2 - Xoff Character 2
Reserved
Xon-1 - Xon Character 1
Reserved
Xon-2 - Xon Character 2
Reserved
T
ABLE
1.62V TO 3.63V HIGH PERFORMANCE OCTAL UART WITH 32-BYTE FIFO
- Auto RS-485 Delay
12: UART C
R
EGISTER
E
16550 C
HANNEL
NHANCED
31
OMPATIBLE
C
R
ONFIGURATION
EGISTER
R
Read/Write
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
Read-only
Write-only
Read-only
Read-only
Write-only
Read-only
Write-only
Read-only
Write-only
Read-only
Write-only
Read-only
EAD
R
/W
EGISTERS
RITE
Xon,Xoff Rcvd.
C
LCR[7] = 0
LCR[7] = 1
LCR[7] = 1
LCR[7] = 1
LCR[7] = 0
LCR[7] = 0
OMMENTS
Flags
XR16M698