參數(shù)資料
型號(hào)： XR16V698IQ-0B-EVB
廠商： Exar Corporation
文件頁數(shù)： 24/58頁
文件大?。?/td> 0K
描述： EVAL BOARD FOR XR16V698-B 100QFP
標(biāo)準(zhǔn)包裝： 1
系列： *
XR16V698
30
2.25V TO 3.6V HIGH PERFORMANCE OCTAL UART WITH 32-BYTE FIFO
REV. 1.0.3
3.2
UART Channel Configuration Registers
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.
TABLE 11: UART CHANNEL CONFIGURATION REGISTERS
ADDRESS
REGISTER
READ/WRITE
COMMENTS
A3 A2 A1 A0
16550 COMPATIBLE
0
0 0
RHR - Receive Holding Reg
THR - Transmit Holding Register
Read-only
Write-only
LCR[7] = 0
0
0 0
DLL - Divisor LSB
Read/Write
LCR[7] = 1
0
0 1
DLM - Divisor MSB
Read/Write
LCR[7] = 1
0
1 0
DLD - Divisor Fractional Part
Read/Write
LCR[7] = 1
0
0 1
IER - Interrupt Enable Reg
Read/Write
LCR[7] = 0
0
1 0
ISR - Interrupt Status Reg
FCR - FIFO Control Reg
Read-only
Write-only
LCR[7] = 0
0
1 1
LCR - Line Control Reg
Read/Write
0
1
0 0
MCR - Modem Control Reg
Read/Write
0
1
0 1
LSR - Line Status Reg
Read-only
0
1
1 0
MSR - Modem Status Reg
- Auto RS-485 Delay
Read-only
Write-only
0
1
1 1
SPR - Scratch Pad Reg
Read/Write
ENHANCED REGISTER
1
0
0 0
FCTR
Read/Write
1
0
0 1
EFR - Enhanced Function Reg
Read/Write
1
0
1 0
Reserved
Read-only
1
0
1 1
Reserved
Read-only
1
0 0
Xoff-1 - Xoff Character 1
Xchar
Write-only
Read-only
Xon,Xoff Rcvd.
Flags
1
0 1
Xoff-2 - Xoff Character 2
Reserved
Write-only
Read-only
1
1 0
Xon-1 - Xon Character 1
Reserved
Write-only
Read-only
1
1 1
Xon-2 - Xon Character 2
Reserved
Write-only
Read-only
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