am79c961a Advanced Micro Devices, am79c961a Datasheet - Page 138

• Manufacturer Part Number: am79c961a
• Description: Pcnet?-isa Ii Jumperless, Full Duplex Single-chip Ethernet Controller For Isa
• Manufacturer: Advanced Micro Devices

SWITCHING CHARACTERISTICS: BUS MASTER MODE (continued)
138
Master Mode Bus Release
Master Write Cycles
Master Read Cycles
Parameter
Symbol
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
t
MMBR1
MMBR2
MMBR3
MMBR4
MMW10
MMW11
t
t
t
t
t
t
t
t
t
MMR10
MMR11
MMW1
MMW2
MMW3
MMW4
MMW5
MMW6
MMW7
MMW8
MMW9
MMR1
MMR2
MMR3
MMR4
MMR5
MMR6
MMR7
MMR8
MMR9
Command Deassert to
SA0–19, LA17–23 Tristated
SBHE, SA0–19, LA17–23, Active
to
MEMW Active
MEMW Inactive
LA17–23,SD Inactive
SBHE, SA0–19, LA17–23, SD
Hold After
SBHE, SA0–19, LA17–23, SD
Setup to
IOCHRDY Inactive
SD Active to
SD Setup to
SBHE, SA0–19, LA17–23, Active
to
MEMR Active
MEMR Inactive
LA17–23 Inactive
SBHE, SA0–19, LA17–23 Hold
After
SBHE, SA0–19, LA17–23 Setup to
IOCHRDY Inactive
SD Setup to
SD Hold After
IOCHRDY to
IOCHRDY to
DRQ to
DRQ to
DRQ to Command, SBHE,
MEMW to SBHE, SA0–19,
IOCHRDY Delay from
MEMW
MEMR to SBHE, SA0–19,
MEMR
IOCHRDY Delay from
MEMW
MEMR
Parameter Description
MEMW
MEMW
DACK
MASTER
MEMW
MEMW
MEMR
MEMW
MEMR
MEMW
MEMR
DRQ
MEMR
Test Conditions
Am79C961A
(Note 1)
(Note 2)
(Note 1)
(Note 1)
(Note 1)
(Note 1)
(Note 1)
(Note 2)
(Note 1)
(Note 1)
EXTIME + 45
MSWRA – 10
EXTIME + 97
EXTIME + 45
EXTIME + 20
EXTIME + 20
EXTIME + 45
EXTIME + 97
EXTIME + 45
MSRDA – 10
t
t
MMW2
MMR2
Min
–15
130
130
45
40
45
45
55
45
45
55
30
0
0
– 175
– 175
EXTIME + 105
EXTIME + 105
EXTIME + 65
EXTIME + 55
EXTIME + 60
EXTIME + 60
EXTIME + 60
EXTIME + 55
MSWRA + 5
MSRDA + 5
Max
65
60
55
60
55
55
0
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
ns
ns