XR16L788 Datasheet, PDF (18/42 Pages) Exar Corporation – HIGH PERFORMANCE OCTAL UART

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XR16L788 OCTAL UART
REV. 1.1.4
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TABLE 7: UART CHANNEL CONFIGURATION REGISTERS.
ADDRESS
A3 A2 A1 A0
0 0 00
0 0 00
0 0 01
0 0 01
0 0 10
0 0 11
0 1 00
0 1 01
0 1 10
0 1 11
1 0 00
1 0 01
1 0 10
1 0 11
1 1 00
REGISTER
16550 COMPATIBLE
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
ENHANCED REGISTER
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-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
Read/Write
Read/Write
Read-only
Write-only
Read-only
Write-only
Write-only
Read-only
1 1 01
1 1 10
1 1 11
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
COMMENTS
LCR[7] = 0
LCR[7] = 1
LCR[7] = 1
LCR[7] = 0
Xon,Xoff Rcvd.
Flags
18