Wiznet W7500 Reference Manual page 227

0 : Low driving strength
1 : High driving strength
[5] PD04_IE : Input buffer enable selection register of Pad PD_04
0 : Input buffer disable
1 : Input buffer enable
[6] PD04_CS – CMOS input or Summit trigger input selection register of Pad PD_04
0 : CMOS input buffer
1 : Summit trigger input buffer
W7500 Datasheet Version1.0.0
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