DP83916VF National Semiconductor, DP83916VF Datasheet - Page 62

• Manufacturer Part Number: DP83916VF
• Description: IC CTRLR ORIENT NETWK IN 132PQFP
• Manufacturer: National Semiconductor
• Series: SONIC™r

Specifications of DP83916VF

• Controller Type: Network Interface Controller (NIC)
• Interface: Bus
• Mounting Type: Surface Mount
• Package / Case: 132-MQFP, 132-PQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Current - Supply: -
• Voltage - Supply: -
• Operating Temperature: -
• Other names: *DP83916VF

5 0 Bus Interface
During read cycles ( Figures 5-16 and 5-17 ) data (D15–D0)
is latched at the falling edge of T2 and DS is asserted at the
falling edge of T1 For write cycles ( Figures 5-18 and 5-19 )
data is driven on the falling edge of T1 If there are wait
states inserted DS is asserted on the falling edge of the first
T2(wait) DS is not asserted for zero wait state write cycles
FIGURE 5-18 Memory Write BMODE
FIGURE 5-19 Memory Write BMODE
(Continued)
62
e
e
The SONIC-16 terminates the memory cycle by deasserting
DS at the falling edge of T2
Note If the setup time for RDYi is met during T1 the full asynchronous bus
0 Asynchronous (1 Wait-State)
0 Asynchronous (2 Wait-State)
cycle will take only 2 bus clocks This may be an unwanted situation
If so RDYi should be deasserted during T1
TL F 11722 – 44
TL F 11722 – 45