IT8673F View Datasheet(PDF) - ITE Tech. INC.

Part Name

Description

Manufacturer

IT8673F

Advanced Input / Output (Advanced I/O)

ITE Tech. INC. 

13.7 Floppy Disk Drive Timings

IT8673F

Symbol

Parameter

Min. Typ. Max. Unit

t1 DIR# active to STEP# low

t2 STEP# active time (low)

t3 DIR# hold time after STEP#

t4 STEP# cycle time

4X

tmclkNote1

24X tmclk

tSRTNote2

tSRT

nsec

nsec

msec

msec

t5 INDEX# low pulse width

2X tmclk

nsec

t6 RDATA# low pulse width

t7 WDATA# low pulse width

40

1X tmclk

nsec

nsec

Note 1: tmclk is the cycle of main clock for the microcontroller of FDC. 1/ tmclk =8M/ 4M/ 2.4M/ 2M hz for 1M/

500K/ 300K/ 250 Kbps transfer rates respectively.

Note 2: tSRT is the cycle of the Step Rate Time. Please refer to the functional description of the SPECIFY

command of the FDC.

DIR#

STEP#

INDEX#

t2

t1

t5

t3

t4

t6

RDATA#

t7

WDATA#

113

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