XR16C2450IJ EXAR [Exar Corporation], XR16C2450IJ Datasheet - Page 19
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XR16C2450IJ
Manufacturer Part Number
XR16C2450IJ
Description
2.97V TO 5.5V DUART
Manufacturer
EXAR [Exar Corporation]
Datasheet
1.XR16C2450IJ.pdf
(31 pages)
Available stocks
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Part Number
Manufacturer
Quantity
Price
Part Number:
XR16C2450IJ44-F
Manufacturer:
EXAR/艾科嘉
Quantity:
20 000
xr
REV. 1.0.0
MSR[3]: Delta CD# Input Flag
•
•
MSR[4]: CTS Input Status
Normally this bit is the compliment of the CTS# input. However in the loopback mode, this bit is equivalent to
the RTS# bit in the MCR register. The CTS# input may be used as a general purpose input when the modem
interface is not used.
MSR[5]: DSR Input Status
Normally this bit is the compliment of the DSR# input. In the loopback mode, this bit is equivalent to the DTR#
bit in the MCR register. The DSR# input may be used as a general purpose input when the modem interface is
not used.
MSR[6]: RI Input Status
Normally this bit is the compliment of the RI# input. In the loopback mode this bit is equivalent to bit-2 in the
MCR register. The RI# input may be used as a general purpose input when the modem interface is not used.
MSR[7]: CD Input Status
Normally this bit is the compliment of the CD# input. In the loopback mode this bit is equivalent to bit-3 in the
MCR register. The CD# input may be used as a general purpose input when the modem interface is not used.
This is a 8-bit general purpose register for the user to store temporary data. The content of this register is
preserved during sleep mode but becomes 0xFF (default) after a reset or a power off-on cycle.
The Baud Rate Generator (BRG) is a 16-bit counter that generates the data rate for the transmitter. The rate is
programmed through registers DLL and DLM which are only accessible when LCR bit-7 is set to ‘1’.
“Programmable Baud Rate Generator” on page 8.
4.9
4.10
Logic 0 = No change on CD# input (default).
Logic 1 = Indicates that the CD# input has changed state since the last time it was monitored. A modem
status interrupt will be generated if MSR interrupt is enabled (IER bit-3).
Scratch Pad Register (SPR) - Read/Write
Baud Rate Generator Registers (DLL and DLM) - Read/Write
for more details.
19
2.97V TO 5.5V DUART
XR16C2450
See