FDC37B80X SMSC [SMSC Corporation], FDC37B80X Datasheet - Page 8

• Manufacturer Part Number: FDC37B80X
• Description: PC98/99 Compliant Enhanced Super I/O Controller with Keyboard/Mouse Wake-Up
• Manufacturer: SMSC [SMSC Corporation]

No./QFP
Note 1:
Note 2:
Note 3:
Note 4:
Note 5:
75:68
PIN
92
66
67
83
82
81
77
80
79
78
59
58
57
56
64
63
For 12 bit addressing, SA0:SA11 only, nCS should be tied to GND. For 16 bit external
address 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 FDC37B80x addressing modes.
The "n" as the first letter of a signal name indicates an "Active Low" signal.
KBDRST is active low.
regardless of the state of internal PWRGOOD.
The pull-down on this pin is always active including when the output driver is tristated and
Requires external pull-up resistor.
Ring Indicator 2/8042 P16
Parallel Port Data Bus
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
KEYBOARD/MOUSE INTERFACE (6)
PARALLEL PORT INTERFACE (17)
NAME
DESCRIPTION OF PIN FUNCTIONS
8
TOTAL
1
8
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
nRI2/P16
PD[0:7]
nSLCTIN
nINIT
nALF
nSTROBE
BUSY
nACK
PE
SLCT
nERROR
KDAT
KCLK
MDAT
MCLK
KBDRST
(Note 3)
A20M
SYMBOL
OD24/O24
OD24/O24
OD24/O24
OD24/O24
BUFFER
IOD16
IOD16
IOD16
IOD16
I/IO24
TYPE
IO24
O4
O4
I
I
I
I
I