FDC37N3869 Datasheet, PDF (119/136 Pages) SMSC Corporation – 3.3V SUPER I/O CONTROLLER WITH INFRARED SUPPORT

AEN
FDRQ,
PDRQ
FDACKX
PDACKX
nIOR
or
nIOW
DATA
(DO-D7)
TC
t1
t14
t6
t5
t15
t16
t3
t2
t4
t12
t11
t8
t7
t13
t10
t9
DATA VALID
FDRQ refers to the DRQ assigned to the Floppy Disk
PDRQ refers to the DRQ assigned to the Parallel Port
FDACKX refers to the nDACK assigned to the to the Floppy Disk
PDACKX refers to the nDACK assigned to the Parallel Port
Parameter
t1 nDACK Delay Time from FDRQ High
t2 DRQ Reset Delay from nIOR or nIOW
t3 FDRQ Reset Delay from nDACK Low
t4 nDACK Width
t5 nIOR Delay from FDRQ High
t6 nIOW Delay from FDRQ High
t7 Data Access Time from nIOR Low
t8 Data Set Up Time to nIOW High
t9 Data to Float Delay from nIOR High
t10 Data Hold Time from nIOW High
t11 nDACK Set Up to nIOW/nIOR Low
t12 nDACK Hold After nIOW/nIOR High
t13 TC Pulse Width
t14 AEN Set Up to nIOR/nIOW
t15 AEN Hold from nDACK
t16 TC Active to PDRQ Inactive
min
typ
0
150
0
0
40
10
10
5
10
60
40
10
FIGURE 10 - DMA TIMING
max
100
100
100
60
100
units
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
SMSC DS – FDC37N3869
Page 119
Rev. 10/25/2000