DP83266VF National Semiconductor, DP83266VF Datasheet - Page 38

• Manufacturer Part Number: DP83266VF
• Description: IC MEDIA ACSS CTRL INTF 160PQFP
• Manufacturer: National Semiconductor

Specifications of DP83266VF

• Applications: *
• Voltage - Supply: 4.75 V ~ 5.25 V
• Package / Case: 160-BFQFP
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Interface: -
• Other names: *DP83266VF

6 0 Functional Description (Service Engine)
6 4 4 Virtual Addressing Bus Transactions
Single Read
Tbr MACSI device asserts AB BR to indicate it wishes to
perform a transfer Host asserts AB BG The MACSI de-
vice moves to Tva within the next three clocks and then
drives AB A and AB AD
Tva MACSI device drives AB A and AB AD with the vir-
tual address for one clock negates AB AS asserts
AB R W drives AB SIZ 2 0 and negates AB BR if an-
other transaction is not required
Tmmu Host MMU performs an address translation during
this clock
Tpa Host MMU drives AB AD with the translated (physi-
cal) address
FIGURE 6-7 ABus Burst Write Physical Addressing 16 Bytes 1 w s
38
Td MACSI device negates AB AS asserts AB DEN and
samples AB ACK and AB ERR Slave asserts AB ACK
drives AB ERR and drives AB AD (with data) when
ready MACSI device samples a valid AB ACK and cap-
tures the read data Tw states may occur after Td
Tr MACSI device negates AB R W AB DEN and
AB SIZ 2 0
deasserts AB ACK and AB ERR and releases AB AD
Single Write
Tbr MACSI device asserts AB BR to indicate it wishes to
perform a transfer Host asserts AB BG The MACSI de-
vice moves to Tva within the next three clocks and then
drives AB A and AB AD
Tva MACSI device drives AB A and AB AD with the vir-
tual address for one clock negates AB AS negates
AB R W and drives AB SIZ 2 0
(Continued)
and releases AB A and AB AS Slave
TL F 11705 – 12