D765 Ver la hoja de datos (PDF) - NEC => Renesas Technology

Número de pieza

componentes Descripción

Lista de partido

D765

Single/Double Density Floppy-Disk Controller

NEC => Renesas Technology 

AC Characteristics (cont)

Parameter

Symbol

delay from DRQ

delay

from DRQ

response time

from DRQ

Min Typ (1) Max Unit Conditions

800

ns S-MHz CLK

Note 4

250

ns

12

Notes:

(1) Typical values for TA = 25°C and nominal supply voltage.

( 2 ) Under software controLThe range is fromms1to 16ms at 8-Mhz

clock period, and 2 ms to 32 ms at 4-Mhz clock period.

(3) When one device is executing a SEEK operation, SENSE DRIVE

STATUS is executed on another device.

(4) Double these values for a 4-MHZ clock period

(5) Thedrivesiderating has a variance of ~5Ons from the minimum

value.

liming Waveforms

Processor Read Operation

Processor Write Operation

CS, DACK

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