KSZ9021GN TR Micrel Inc, KSZ9021GN TR Datasheet - Page 51

• Manufacturer Part Number: KSZ9021GN TR
• Description: Specifications: Number of Drivers/Receivers: 8/8 ; Type: Transceiver ; Voltage - Supply: 3.135 V ~ 3.465 V ; Package / Case: 64-VFQFN Exposed Pad ; Packaging: Tape & Reel (TR) ; Protocol: Gigabit Ethernet ; Lead Free Status: Lead Free ; RoHS Stat
• Manufacturer: Micrel Inc

Micrel, Inc.
KSZ9021GN
The following reset circuit is recommended for applications where reset is driven by another device (e.g., CPU or FPGA).
At power-on-reset, R, C and D1 provide the necessary ramp rise time to reset the KSZ9021GN device. The RST_OUT_N
from CPU/FPGA provides the warm reset after power up.
Figure 14. Recommended Reset Circuit for Interfacing with CPU/FPGA Reset Output.
Reference Circuits – LED Strap-in Pins
The pull-up and pull-down reference circuits for the LED2/PHYAD1 and LED1/PHYAD0 strapping pins are shown in the
following figure.
Figure 15. Reference Circuits for LED Strapping Pins
September 2010
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M9999-091010-1.1