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LAN9221_12 Datasheet, PDF (127/151 Pages) SMSC Corporation – High-Performance 16-bit Non-PCI 10/100 Ethernet Controller with Variable Voltage I/O | |||
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High-Performance 16-bit Non-PCI 10/100 Ethernet Controller with Variable Voltage I/O
Datasheet
Chapter 6 Timing Diagrams
6.1
Equivalent Test Load
Output timing specifications assume an equivalent test load as illustrated in Figure 6.1 below.
OUTPUT
Test load varies dependent on VDDVARIO:
VDDVARIO = 3.3V ± 300mV: 25pF
VDDVARIO = 2.5V ± 10%: 10pF
VDDVARIO=1.8V ± 10%: 10pF
6.2
Figure 6.1 Equivalent Test Load
Host Interface Timing
The LAN9221/LAN9221i supports the following host cycles:
Read Cycles:
 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)
Write Cycles:
 PIO writes (nCS and nWR controlled)
 TX Data FIFO direct PIO writes (nCS or nWR controlled)
All timing measurements were verified under the following conditions:
Note: The specified test load used for output timing is dependant on VDDVARIO.
Temperature: ................................................................................................................................ Note 6.1
Load Capacitance (VDDVARIO = 3.3V +/- 300mV):........................................................................ 25pF
Load Capacitance (VDDVARIO = 2.5V +/- 10%): ............................................................................ 10pF
Load Capacitance (VDDVARIO = 1.8V +/- 10%): ............................................................................ 10pF
Note 6.1 0oC to +70oC for commercial version, -40oC to +85oC for industrial version.
SMSC LAN9221/LAN9221i
127
DATASHEET
Revision 2.9 (03-01-12)
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