lan9220 Standard Microsystems Corp., lan9220 Datasheet - Page 127

• Manufacturer Part Number: lan9220
• Description: 16-bit Non-pci Small Form Factor 10/100 Ethernet Controller With Variable Voltage I/o & Hp Auto-mdix Support
• Manufacturer: Standard Microsystems Corp.

16-bit Non-PCI Small Form Factor 10/100 Ethernet Controller with Variable Voltage I/O & HP Auto-MDIX Support
Datasheet
Chapter 6 Timing Diagrams
SMSC LAN9220
6.1
6.2
Read Cycles:
Write Cycles:
Output timing specifications assume an equivalent test load as illustrated in
The LAN9220 supports the following host cycles:
All timing measurements were verified under the following conditions:
Note: The specified test load used for output timing is dependant on VDDVARIO.
Temperature: ........................................................................................................................0
Load Capacitance (VDDVARIO = 3.3V +/- 300mV):........................................................................ 25pF
Load Capacitance (VDDVARIO = 2.5V +/- 10%): ............................................................................ 10pF
Load Capacitance (VDDVARIO = 1.8V +/- 10%): ............................................................................ 10pF
Equivalent Test Load
Host Interface Timing
OUTPUT
PIO Reads (nCS or nRD controlled)
PIO Burst Reads (nCS or nRD controlled)
RX Data FIFO Direct PIO Reads (nCS or nRD controlled)
RX Data FIFO Direct PIO Burst Reads (nCS or nRD controlled)
PIO writes (nCS and nWR controlled)
TX Data FIFO direct PIO writes (nCS or nWR controlled)
Figure 6.1 Equivalent Test Load
DATASHEET
Test load varies dependent on VDDVARIO:
VDDVARIO = 3.3V ± 300mV: 25pF
VDDVARIO = 2.5V ± 10%: 10pF
VDDVARIO=1.8V ± 10%: 10pF
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Figure 6.1
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