LPC MicrocontrollersのトピックLPC2387 interface with MM74HC573 - 3 state problem https://community.nxp.com/t5/LPC-Microcontrollers/LPC2387-interface-with-MM74HC573-3-state-problem/m-p/551051#M14121 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by Erez on Thu Sep 24 02:18:16 MST 2015</STRONG><BR /><SPAN>Hi,</SPAN><BR /><SPAN>Im using P1[17] as out_control for MM74HC573.</SPAN><BR /><SPAN>When i first connect the voltage or reset the system, i am getting voltage 2[v] ( ONly voltage above 3[v] means '1')</SPAN><BR /><SPAN>This is a big problem. i need the value to be '1' (or '0').</SPAN><BR /><SPAN>How can i solves this?</SPAN><BR /><SPAN> </SPAN><BR /><SPAN>I've tried some actions:</SPAN><BR /><SPAN>- Disabled the P1[17]&nbsp; ENET-MDIO option</SPAN><BR /><SPAN>- Tried to write directly to the register- no effect </SPAN><BR /><SPAN>- Tried to connect pull up resistor.</SPAN><BR /><BR /><SPAN>Could someone help in this please?</SPAN><BR /><BR /><SPAN>By the way,</SPAN><BR /><SPAN>I have already a system that works perfect when i use the P0[26] for outcontrol.</SPAN></BODY></HTML> Wed, 15 Jun 2016 19:50:50 GMT lpcware 2016-06-15T19:50:50Z LPC2387 interface with MM74HC573 - 3 state problem https://community.nxp.com/t5/LPC-Microcontrollers/LPC2387-interface-with-MM74HC573-3-state-problem/m-p/551051#M14121 <HTML><HEAD></HEAD><BODY><STRONG>Content originally posted in LPCWare by Erez on Thu Sep 24 02:18:16 MST 2015</STRONG><BR /><SPAN>Hi,</SPAN><BR /><SPAN>Im using P1[17] as out_control for MM74HC573.</SPAN><BR /><SPAN>When i first connect the voltage or reset the system, i am getting voltage 2[v] ( ONly voltage above 3[v] means '1')</SPAN><BR /><SPAN>This is a big problem. i need the value to be '1' (or '0').</SPAN><BR /><SPAN>How can i solves this?</SPAN><BR /><SPAN> </SPAN><BR /><SPAN>I've tried some actions:</SPAN><BR /><SPAN>- Disabled the P1[17]&nbsp; ENET-MDIO option</SPAN><BR /><SPAN>- Tried to write directly to the register- no effect </SPAN><BR /><SPAN>- Tried to connect pull up resistor.</SPAN><BR /><BR /><SPAN>Could someone help in this please?</SPAN><BR /><BR /><SPAN>By the way,</SPAN><BR /><SPAN>I have already a system that works perfect when i use the P0[26] for outcontrol.</SPAN></BODY></HTML> Wed, 15 Jun 2016 19:50:50 GMT https://community.nxp.com/t5/LPC-Microcontrollers/LPC2387-interface-with-MM74HC573-3-state-problem/m-p/551051#M14121 lpcware 2016-06-15T19:50:50Z