AM79C90 Advanced Micro Devices, AM79C90 Datasheet - Page 39

• Manufacturer Part Number: AM79C90
• Description: CMOS Local Area Network Controller for Ethernet (C-LANCE)
• Manufacturer: Advanced Micro Devices

SWITCHING CHARACTERISTICS (continued)
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Parameter
Symbol Parameter Description
t
t
t
t
t
t
t
t
t
t
t
t
t
t
SWDH
SWDS
t
t
t
t
RDAH
DDAS
SRDH
ALEW
RDYS
t
t
t
DALE
ADAS
WDSI
SD01
SD02
t
WDS
WDH
DSW
RIDF
ROIF
t
RIOF
t
ROH
CSH
CSS
RIH
RIS
OS
Data Hold Time After the Rising Edge
of DAS (Bus Master Read)
Data Setup Time to the Falling Edge
of DAS (Bus Master Write)
Data Setup Time to the Rising Edge
of DAS (Bus Master Write)
Data Hold Time After the Rising Edge
of DAS (Bus Master Write)
Data Driver Delay After the Falling
Edge of DAS (Bus Slave Read)
Data Driver Delay After the Falling
Edge of DAS (Bus Slave Read)
Data Hold Time After the Rising
Edge of DAS (Bus Slave Read)
Data Hold Time After the Rising
Edge of DAS (Bus Slave Write)
Data Setup Time to the Falling Edge
of DAS (Bus Slave Write)
ALE Width HIGH
Delay from Rising Edge of DAS to the
Rising Edge of ALE
DAS Width LOW
Delay from the Falling Edge of ALE
to the Falling Edge of DAS
Delay from the Rising of DALO to the
Falling Edge of DAS (Bus Master Read)
Delay from the Falling Edge of READY
to the Rising Edge of DAS
Delay from the Rising Edge of DALO to
the Falling Edge of DALI (Bus Master Read)
DALI Setup Time to the Rising Edge of
DAS (Bus Master)
DALI Hold Time After the Rising Edge of
DAS (Bus Master Read)
Delay from the Rising Edge of DALI to the
Falling Edge of DALO (Bus Master Read)
DALO and READ Setup Time to the Falling
Edge of ALE (Bus Master Write and Read)
DALO Hold Time After the Falling Edge of
ALE (Bus Master Read)
Delay from the Rising Edge of DAS to the
Rising Edge of DALO (Bus Master Write)
CS Hold Time After the Rising Edge of DAS
(Bus Slave)
CS Setup Time to the Falling Edge of DAS
(Bus Slave)
P R E L I M I N A R Y
Am79C90
(CSR0, CSR3, RAP)
Conditions
(CSR1, 2)
(Note 6)
(Note 6)
Test
Min
200
120
200
135
110
10
35
70
80
15
65
15
55
35
35
0
0
0
0
0
0
0
12t
4t
Typ
TCT
TCT
Max
130
250
55
AMD
Unit
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
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