DS96-L147-203 CONEXANT [Conexant Systems, Inc], DS96-L147-203 Datasheet - Page 82
DS96-L147-203
Manufacturer Part Number
DS96-L147-203
Description
SmartV.XX Modem
Manufacturer
CONEXANT [Conexant Systems, Inc]
Datasheet
1.DS96-L147-203.pdf
(94 pages)
- Current page: 82 of 94
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Table 5-1. Parallel Interface Registers
(DLAB = 0)
(DLAB = 0)
(DLAB = 0)
(DLAB = 1)
(DLAB = 1)
5-2
Register
No.
7
6
5
4
3
2
2
1
0
0
1
0
Scratch Register (SCR)
Modem Status Register (MSR) Data Carrier
Line Status Register (LSR)
Modem Control Register (MCR)
Line Control Register (LCR)
Interrupt Identify Register (IIR)
(Read Only)
FIFO Control Register (FCR)
(Write Only)
Interrupt Enable Register (IER)
Transmitter Buffer Register
(THR)
Receiver Buffer Register (RBR)
Divisor Latch MSB Register
(DLM)
Divisor Latch LSB Register
(DLL)
Register
Name
CX81801-7x/8x SmartV.XX Modem Data Sheet
Divisor Latch
Trigger MSB
Access Bit
RX FIFO
Receiver
Enabled
(DLAB)
Detect
(DCD)
FIFOs
Error
7
0
0
Indicator (RI)
Transmitter
Set Break
Receiver
Enabled
(TEMT)
Trigger
Empty
FIFOs
Ring
LSB
6
0
0
Conexant
Transmitter
Stick Parity Even Parity
Reserved
Data Set
Register
(THRE)
Ready
(DSR)
Empty
Buffer
Transmitter FIFO Buffer Register (Write Only)
Receiver FIFO Buffer Register (Read Only)
5
0
0
0
Interrupt (BI)
Select (EPS)
Loopback
Reserved
Clear to
(CTS)
Break
Send
Local
Divisor Latch MSB
Divisor Latch LSB
Scratch Register
4
0
0
Bit No.
Interrupt ID
DMA Mode
Delta Data
Framing
Pending
Interrupt
(EDSSI)
(DDCD)
Modem
Enable
Enable
Carrier
Detect
Select
Status
(PEN)
Out 2
Parity
Error
Bit 2
(FE)
3
Edge of Ring
Interrupt ID
Line Status
Number of
Stop Bits
Indicator
TX FIFO
Receiver
Pending
Interrupt
Trailing
Enable
(TERI)
(ELSI)
Parity
(STB)
Reset
Out 1
Error
(PE)
Bit 1
2
Word Length
Select Bit 1
Interrupt ID
Transmitter
Request to
Delta Data
Set Ready
RX FIFO
Register
Interrupt
Overrun
Pending
(ETBEI)
(DDSR)
(WLS1)
Holding
Enable
Empty
(RTS)
Reset
Send
Error
Bit 0
(OE)
1
Word Length
FIFO Enable
Data Ready
Delta Clear
Select Bit 0
Received
Receiver
Available
Terminal
Interrupt
Pending
Interrupt
(ERBFI)
to Send
(DCTS)
(WLS0)
Enable
102199B
Ready
(DTR)
(DR)
Data
“0" if
Data
0
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