P R E L I M I N A R Y
AMD
39
Am79C90
SWITCHING CHARACTERISTICS (continued)
Parameter
No. Symbol Parameter Description
Test
Conditions
Min
Typ
Max
Unit
31
t
RDAH
Data Hold Time After the Rising Edge
of
DAS
(Bus Master Read)
0
ns
32
t
DDAS
Data Setup Time to the Falling Edge
of
DAS
(Bus Master Write)
10
ns
33
t
WDS
Data Setup Time to the Rising Edge
of
DAS
(Bus Master Write)
200
ns
34
t
WDH
Data Hold Time After the Rising Edge
of
DAS
(Bus Master Write)
35
ns
35
t
SD01
Data Driver Delay After the Falling
Edge of
DAS
(Bus Slave Read)
(CSR0, CSR3, RAP)
(Note 6)
4t
TCT
ns
36
t
SD02
Data Driver Delay After the Falling
Edge of
DAS
(Bus Slave Read)
(CSR1, 2)
(Note 6)
12t
TCT
ns
37
t
SRDH
Data Hold Time After the Rising
Edge of
DAS
(Bus Slave Read)
0
55
ns
38
t
SWDH
Data Hold Time After the Rising
Edge of
DAS
(Bus Slave Write)
0
ns
39
t
SWDS
Data Setup Time to the Falling Edge
of
DAS
(Bus Slave Write)
0
ns
40
t
ALEW
ALE Width HIGH
120
ns
41
t
DALE
Delay from Rising Edge of
DAS
to the
Rising Edge of ALE
70
ns
42
t
DSW
DAS
Width LOW
200
ns
43
t
ADAS
Delay from the Falling Edge of ALE
to the Falling Edge of
DAS
80
130
ns
44
t
RIDF
Delay from the Rising of
DALO
to the
Falling Edge of
DAS
(Bus Master Read)
15
ns
45
t
RDYS
Delay from the Falling Edge of
READY
to the Rising Edge of
DAS
65
250
ns
46
t
ROIF
Delay from the Rising Edge of
DALO
to
the Falling Edge of
DALI
(Bus Master Read)
15
ns
47
t
RIS
DALI
Setup Time to the Rising Edge of
DAS
(Bus Master)
135
ns
48
t
RIH
DALI
Hold Time After the Rising Edge of
DAS
(Bus Master Read)
0
ns
49
t
RIOF
Delay from the Rising Edge of
DALI
to the
Falling Edge of
DALO
(Bus Master Read)
55
ns
50
t
OS
DALO
and READ Setup Time to the Falling
Edge of ALE (Bus Master Write and Read)
110
ns
51
t
ROH
DALO
Hold Time After the Falling Edge of
ALE (Bus Master Read)
35
ns
52
t
WDSI
Delay from the Rising Edge of
DAS
to the
Rising Edge of
DALO
(Bus Master Write)
35
ns
53
t
CSH
CS
Hold Time After the Rising Edge of
DAS
(Bus Slave)
0
ns
54
t
CSS
CS
Setup Time to the Falling Edge of
DAS
(Bus Slave)
0
ns