FDC87W22 View Datasheet(PDF) - SMSC -> Microchip
Part Name
Description
MFG CO.
'FDC87W22' PDF : 140 Pages View PDF
SYMBOL
PIN
I/O
FUNCTION
nDTRA
PHEFRAS
35
I/O8t UART A Data Terminal Ready. An active low informs the
modem or data set that the controller is ready to
communicate.
During power-on reset, this pin is pulled down internally and
is defined as PHEFRAS, which provides the power-on value
for CR16 bit 0 (HEFRAS). A 47 kΩ is recommended when
intends to pull up at power-on reset.
nDTRB
46
O8t
UART B Data Terminal Ready. An active low informs the
modem or data set that controller is ready to communicate.
nRTSA
PPNPCVS
36
I/O8t UART A Request To Send. An active low informs the
modem or data set that the controller is ready to send data.
During power-on reset, this pin is pulled up internally and is
defined as PPNPCVS, which provides the power-on value
for CR16 bit 2 (PNPCVS). A 47 kΩ is recommended when
intends to pull down at power-on reset.
nRTSB
45
I/O8t UART B Request To Send. An active low informs the
PGOIQSEL
modem or data set that the controller is ready to send data.
During power-on reset, this pin is pulled down internally and
is defined as PGOIQSEL, which provides the power-on
value for CR16 bit 4 (GOIQSEL). A 47 kΩ is recommended
when intends to pull up at power-on reset.
8
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