NS16C2552TVA NSC [National Semiconductor], NS16C2552TVA Datasheet - Page 10

• Manufacturer Part Number: NS16C2552TVA
• Description: Dual UART with 16-byte/64-byte FIFOs and up to 5 Mbit/s Data Rate
• Manufacturer: NSC [National Semiconductor]

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Default
Default
Default
Default
Default
Default
Default
Default
Default
A2-A0
Addr
MCR
MSR
RBR
THR
FCR
LCR
SCR
6.0 Register Set
Reg
LSR
0x0
IER
0x1
0x2
0x2
0x3
0x4
0x5
0x6
0x7
IIR
R/W
R/W
R/W
R/W
R/W
RD/
WR
W
R
R
R
CTS Int
Clk Div
Gbl Err
Trigger
Divisor
FIFOs
Data7
BIT 7
FIFO
FIFO
DCD
Input
DCD
SCR
Bit 7
Ena
Ena
Ena
Sel
RX
Rx
X
0
0
0
0
0
0
1
Trigger
THR &
Set Tx
FIFOs
IR Md
Empty
Data6
Break
BIT 6
FIFO
Input
SCR
Bit 6
RTS
TSR
Ena
Ena
Ena
UART 16C550 Compatible Registers (Default Values Upon Reset)
RX
(Continued)
Int
RI
RI
X
0
0
0
0
0
1
1
Xoff Int
Trigger
THR E
(2752)
Data5
Parity
BIT 5
FIFO
mpty
Input
Bit 5
DSR
DSR
SCR
Bit 5
Ena
Xon
Any
INT
Src
Set
Tx
X
0
0
0
0
0
1
1
TABLE 2. NS16C2552 Register Summary
Sleep Md
Tx FIFO
INT Src
Internal
Loopbk
Trigger
(2752)
Data4
BIT 4
Parity
Break
Even
Input
SCR
Bit 4
CTS
CTS
Bit 4
Ena
Ena
Rx
X
0
0
0
0
0
0
1
Modem
Stat Int
Frame
Data3
OUT2
BIT 3
Parity
Delta
DMA
Error
DCD
Bit 3
SCR
Bit 3
Ena
Ena
Ena
INT
Src
Md
Rx
X
0
0
0
0
0
0
0
1
10
Data2
Reset
OUT1
Parity
BIT 2
FIFO
Delta
Error
Bit 2
Stop
SCR
Bit 2
Line
Stat
Ena
INT
Bits
Src
RX
Rx
Int
Tx
RI
X
0
0
0
0
0
0
0
1
Rx Overrun
Tx Empty
Rx FIFO
INT Src
Int Ena
Control
Length
Output
Data1
Reset
BIT 1
Word
Delta
Error
Bit 1
Bit 1
DSR
SCR
Bit 1
RTS
X
0
0
0
0
0
0
0
1
Data Int
INT Src
Control
Length
Output
Ready
FIFOs
Data0
BIT 0
Word
Delta
Bit 0
Bit 0
DTR
Data
SCR
Bit 0
CTS
Ena
Ena
Rx
Rx
X
0
1
0
0
0
0
0
1
LCR != 0xBF
LCR[7] = 0
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