FDC37C672QFP SMSC Corporation, FDC37C672QFP Datasheet - Page 14

• Manufacturer Part Number: FDC37C672QFP
• Description: ENHANCED SUPER I/O CONTROLLER WITH FAST IR
• Manufacturer: SMSC Corporation

Note 3.1 The interrupt request is output on one of the IRQx signals as an 024 buffer type. If EPP or ECP Mode is
Note 3.2 For 12-bit addressing, SA0:SA11 only, nCS should be tied to GND.
Note 3.3 The "n" as the first letter of a signal name indicates an "Active Low" signal.
Note 3.4 KBDRST is active low.
3.1
SMSC FDC37C672
QFP/TQFP
PIN NO.
67 / 65
66 / 64
82 / 80
83 / 81
79 / 77
80 / 78
78 / 76
77 / 75
81 / 79
56 / 54
57 / 55
58 / 56
59 / 57
63 / 61
64 / 62
enabled, this output is pulsed low, then released to allow sharing of interrupts. In this case, the buffer type
is OD24. Refer to the configuration section for more information.
qualification, address bits SA11:SA15 can be "ORed" together and applied to nCS. The nCS pin functions
as SA11 in full 16-bit Internal Address Qualification Mode. CR24.6 controls the FDC37C672 addressing
modes.
Buffer Type Descriptions
I
IS
IOD16P
IO24
IO4
O4
O24
OD24
ICLK
Printer Select
Initiate Output
Auto Line Feed
Strobe Signal
Busy Signal
Acknowledge Handshake
Paper End
Printer Selected
Error at Printer
Keyboard Data
Keyboard Clock
Mouse Data
Mouse Clock
Keyboard Reset
Gate A20
Input, TTL compatible.
Input with Schmitt trigger.
Input/Output, 16mA sink, 90uA pull-up.
Input/Output, 24mA sink, 12mA source.
Input/Output, 4mA sink, 2mA source.
Output, 4mA sink, 2mA source.
Output, 24mA sink, 12mA source.
Output, Open Drain, 24mA sink.
Clock Input
NAME
KEYBOARD/MOUSE INTERFACE (6)
DATASHEET
Page 14
TOTAL
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
Enhanced Super I/O Controller with Fast IR
nSTROBE
(Note 3.4)
SYMBOL
nERROR
nSLCTIN
KBDRST
MDAT
MCLK
For 16-bit external address
BUSY
KDAT
nACK
SLCT
KCLK
A20M
nINIT
nALF
PE
OD24/O24
OD24/O24
OD24/O24
OD24/O24
BUFFER
IOD16P
IOD16P
IOD16P
IOD16P
Rev. 10-29-03
TYPE
O4
O4
I
I
I
I
I
Datasheet