MB86977 Datasheet, PDF (27/30 Pages) Fujitsu Component Limited. – IP PACKET FORWARDING ENGINE

MB86977
s NOTES ON HARDWARE SETTING
This section describes the sequence of On/Off of the power supply.
Though the sequence of On/Off is not restricted, the following sequences are recommended.
Power-ON sequence:
1) VDDI
2) VDDE
3) Signal
Power-Off sequence:
1) Signal
2) VDDE
3) VDDI
Notes : • VDDE should not be supplied with signals while VDDI is off; otherwise a through current may flow, causing
potential reliability problems of the LSI.
• When switching VDDE from off to on, it is possible that the internal state of the circuit is not be maintained
due to power source noises. Therefore, the circuit should be initialized.
• The circuit should be initialized after power-ON.
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