DP83907VF National Semiconductor, DP83907VF Datasheet - Page 57

• Manufacturer Part Number: DP83907VF
• Description: IC CONTROLLR AT/LANII TP 160PQFP
• Manufacturer: National Semiconductor

Specifications of DP83907VF

• Controller Type: Network Interface Controller (NIC)
• Interface: Twisted Pair
• Voltage - Supply: 4.75 V ~ 5.25 V
• Current - Supply: 150mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 160-MQFP, 160-PQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: *DP83907VF

6 0 Operation of DP83907
(Continued)
Boot PROM Write Bus Timing
TL F 12082 – 41
This is the type of cycle used to write to the boot PROM These accesses are entirely asynchronous with the DP83907
responding when it decodes the correct address on SA0-19 and a SMWR If AEN is high the cycle will be ignored CHRDY is
deasserted if the DP83907 is not ready to respond and asserted when ready If it is ready immediately CHRDY is not deasserted
The data will normally be taken from SD0-7 However if M16 is generated and the access is to an odd address the data will be
taken from SD8-15 The data will always be driven onto MSD0-7 The BPWR bit of Configuration Register B must be high to
allow write cycles to the boot PROM
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