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ST16C1450CQ48 数据表(PDF) 10 Page - Exar Corporation

部件名 ST16C1450CQ48
功能描述  2.97V TO 5.5V UART
Download  28 Pages
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制造商  EXAR [Exar Corporation]
网页  http://www.exar.com
标志 EXAR - Exar Corporation

ST16C1450CQ48 数据表(HTML) 10 Page - Exar Corporation

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ST16C1450
xr
2.97V TO 5.5V UART
REV. 4.2.1
10
3.0 UART INTERNAL REGISTERS
The 1450 has a set of configuration registers selected by address lines A0, A1 and A2. The 16C450
compatible registers can be accessed when LCR[7] = 0 and the baud rate generator divisor registers can be
accessed when LCR[7] = 1. The complete register set is shown on Table 2 and Table 3.
TABLE 2: ST16C1450 UART INTERNAL REGISTERS
A2,A1,A0 ADDRESSES
REGISTER
READ/WRITE
COMMENTS
0 0 0
RHR - Receive Holding Register
THR - Transmit Holding Register
Read-only
Write-only
LCR[7] = 0
0 0 0
DLL - Div Latch Low Byte
Read/Write
LCR[7] = 1
0 0 1
DLM - Div Latch High Byte
Read/Write
0 0 1
IER - Interrupt Enable Register
Read/Write
LCR[7] = 0
0 1 0
ISR - Interrupt Status Register
Reserved
Read-only
Write-only
0 1 1
LCR - Line Control Register
Read/Write
1 0 0
MCR - Modem Control Register
Read/Write
LCR[7] = 0
1 0 1
LSR - Line Status Register
Reserved
Read-only
Write-only
1 1 0
MSR - Modem Status Register
Reserved
Read-only
Write-only
1 1 1
SPR - Scratch Pad Register
Read/Write


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