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 

AEN

SA[x], nCS

nIOW

SD[x]

t3

t2

t1

t4

DATA VALID

FINTR

PINTR

IBF

t10

t6

t5

t7

t8

t9

FIGURE 4 - ISA WRITE

NAME

DESCRIPTION

MIN TYP MAX UNITS

t1 SA[x], nCS and AEN valid to nIOW asserted

10

ns

t2 nIOW asserted to nIOW deasserted

80

ns

t3 nIOW asserted to SA[x], nCS invalid

10

ns

t4 SD[x] Valid to nIOW deasserted

45

ns

t5 SD[x] Hold from nIOW deasserted

0

ns

t6 nIOW deasserted to nIOW asserted

25

ns

t7 nIOW deasserted to FINTR deasserted (Note 1)

55

ns

t8 nIOW deasserted to PINTER deasserted (Note 2)

260

ns

t9 IBF (internal signal) asserted from nIOW deasserted

40

ns

t10 nIOW deasserted to AEN invalid

10

ns

Note 1: FINTR refers to the IRQ used by the floppy disk

Note 2: PINTR refers to the IRQ used by the parallel port

166

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