参数资料
型号: 37C669
厂商: SMSC Corporation
英文描述: DIODE SCHOTTKY SINGLE 25V 200mW 0.5V-vf 200mA-IFM 30mA-IF 2uA-IR SOD-323 3K/REEL
中文描述: 电脑98/99顺从超级I / O软盘控制器与红外线支持
文件页数: 62/164页
文件大小: 621K
代理商: 37C669
154
FIGURE 16B - EPP 1.9 DATA OR ADDRESS READ CYCLE TIMING PARAMETERS
t1
t2
t3
t4
t5
t6
t7
t8
t9
t10
t11
t12
t13
t14
t15
t16
t17
t18
t19
t20
t21
t22
t25
t28
PDATA Hi-Z to Comman d Asserted
nIOR Asserted to PD ATA Hi -Z
nWAIT Deasser ted t o Comma nd
Dea sserted
Comma nd Dea sserted to PDATA Hi-Z
C ommand Asser ted to PDATA Val id
PDATA Hi-Z to n WAIT Deasserted
PDATA Val id to n WAIT Deasserted
n IOR Assertd to IOCHRDY Asserted
nWR ITE Deasser te d to n IOR Asserted
nWAIT Deasserted to IOCHRDY
Dea sserted
IOCHRDY Dea sse rted to n IOR
Dea sserted
nIOR De asserted to SDATA Hi-Z (Ho ld
Time)
PD ATA Valid to SDATA Val id
nWAIT Asserted to Comman d Asserted
Time Ou t
nWAIT De asserted to PDATA D riven
nWAIT Deasser ted to nWRITE Modi fied
SDATA Val id to IOCHR DY Dea sserted
Ax Vali d to nIOR Asserted
nIOR Deasserted to Ax Invalid
nWAIT Asserted t o nWRITE Deasserted
nIOR D easser te d to nIOW or nIOR
Asserted
n WAIT Asserted to PDATA Hi-Z
WRITE Deasserted to Co mma nd
ns
s
ns
s
ns
30
50
1 80
24
1 60
40
75
1 95
12
1 90
85
10
1 85
1 80
Parameter
mi n
max
units
0
60
0
60
0
10
60
0
40
10
0
40
60
1
Notes
1
2
1
1,2
3
1
1 . n WAIT is consi dere d to ha ve settled a fter it does no t transition for a min imum of 50 ns.
2. When not executing a write cycle, EPP nWRITE is in acti ve h igh .
3. 8 5 is tru e o nly if t7 = 0 .
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