37C67X Ver la hoja de datos (PDF) - SMSC -> Microchip

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37C67X

Enhanced Super I/O Controller with Fast IR

SMSC -> Microchip 

PIN

No./QFP

64

Gate A20

DESCRIPTION OF PIN FUNCTIONS

NAME

TOTAL SYMBOL

1

A20M

BUFFER

TYPE

O4

Note 0:

Note 1:

Note 2:

Note 3:

The interrupt request is output on one of the IRQx signals as an 024 buffer type. If EPP or

ECP Mode is 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.

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 FDC37C67x addressing modes.

The "n" as the first letter of a signal name indicates an "Active Low" signal.

KBDRST is active low.

Buffer Type Descriptions

I

IS

IOD16P

IO24

IO4

O4

O24

OD24

ICLK

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

9

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