FDC37C669_07 SMSC [SMSC Corporation], FDC37C669_07 Datasheet - Page 11

• Manufacturer Part Number: FDC37C669_07
• Description: PC 98/99 Compliant Super I/O Floppy Disk Controller with Infrared Support
• Manufacturer: SMSC [SMSC Corporation]

PIN NO.
TQFP
84,86
QFP/
73
74
76
nRing Indicator
nPrinter Select
Input
nInitiate Output
nAutofeed
Output
NAME
DESCRIPTION OF PIN FUNCTIONS
nRI1
nRI2
nSLCTIN
nINIT
nAUTOFD
SYMBOL
PARALLEL PORT INTERFACE
BUFFER
TYPE
OD24
OD24
OD24
0P24
0P24
0P24
I
11
Active low Ring Indicator inputs for the
serial port. Handshake signal which notifies
the UART that the telephone ring signal is
detected by the modem.
monitor the status of nRI signal by reading
bit 6 of Modem Status Register (MSR). A
nRI signal state change from low to high
after the last MSR read will set MSR bit 2 to
a 1. If bit 3 of Interrupt Enable Register is
set, the interrupt is generated when nRI
changes state. Note: Bit 6 of MSR is the
complement of nRI.
This active low output selects the printer.
This is the complement of bit 3 of the Printer
Control Register.
Refer to Parallel Port description for use of
this pin in ECP and EPP mode.
This output is bit 2 of the printer control
register. This is used to initiate the printer
when low.
Refer to Parallel Port description for use of
this pin in ECP and EPP mode.
This output goes low to cause the printer to
automatically feed one line after each line is
printed.
complement of bit 1 of the Printer Control
Register.
Refer to Parallel Port description for use of
this pin in ECP and EPP mode.
The nAUTOFD output is the
DESCRIPTION
The CPU can