DP83932CVF-20 National Semiconductor, DP83932CVF-20 Datasheet - Page 58
DP83932CVF-20
Manufacturer Part Number
DP83932CVF-20
Description
IC CTRLR ORIENT NETWORK 132PQFP
Manufacturer
National Semiconductor
Series
SONIC™r
Datasheet
1.DP83932CVF-20.pdf
(98 pages)
Specifications of DP83932CVF-20
Controller Type
Ethernet Network Interface Controller
Interface
Bus
Voltage - Supply
5V
Mounting Type
Surface Mount
Package / Case
132-MQFP, 132-PQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Current - Supply
-
Operating Temperature
-
Other names
*DP83932CVF-20
- Current page: 58 of 98
- Download datasheet (2Mb)
5 0 Bus Interface
5 4 5 3 Memory Cycle for BMODE
Asynchronous Mode
On the rising edge of T1 the SONIC asserts ECS to indicate
that the memory cycle is starting The address (A31-A1)
bus status (S2-S0) and the direction strobe (MRW) are driv-
en and do not change for the remainder of the memory
cycle On the falling edge of T1 the SONIC deasserts ECS
and asserts AS
In asynchronous mode DSACK0 1 are asynchronously
sampled on the falling edge of both T1 and T2 DSACK0 1
FIGURE 5-10 Memory Read BMODE
FIGURE 5-11 Memory Read BMODE
(Continued)
e
1
58
e
e
do not need to be synchronized to the bus clock because
the chip always resolves these signals to either a high or
low state If a synchronous termination of the bus cycle is
required however STERM may be used STERM is sam-
pled on the rising edge of T2 and must meet the setup and
hold times with respect to that edge for proper operation
Meeting the setup time for DSACK0 1 or STERM guaran-
tees that the SONIC will terminate the memory cycle 1 5
1 Asynchronous (1 Wait-State)
1 Asynchronous (2 Wait-State)
TL F 10492 – 36
TL F 10492 – 37
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