FDC37B80X View Datasheet(PDF) - SMSC -> Microchip

Part Name

Description

Manufacturer

FDC37B80X

PC98/99 compliant enhanced super I/O controller with Keyboard / Mouse Wake-Up / 5 Volt Operation

SMSC -> Microchip 

t2

PCOBF

t1

AUXOBF1

nWRT

t3

IBF

nRD

FIGURE 6 - INTERNAL 8042 CPU TIMING

NAME

DESCRIPTION

t1 nWRT deasserted to AUXOBF1 asserted (Notes 1,2)

t2 nWRT deasserted to PCOBF asserted (Notes 1,3)

t3 nRD deasserted to IBF deasserted (Note 1)

MIN TYP MAX UNITS

40

ns

40

ns

40

ns

Note 1: IBF, nWRT and nRD are internal signals.

Note 2: PCOBF is used for the Keyboard IRQ.

Note 3: AUXOBF1 is used for the Mouse IRQ.

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