The complete C-language routines are provided to gain access to the NWay internal registers as mentioned below. For detailed information on how to manage the NWay function, please refer to the MX98713 PMAC product specification.
/*************************************************** * read MII register * phyad -> physical address * regad -> register address ************************************************** */ unsigned int mii_read(phyad,regad) unsigned char phyad,regad; { unsigned int i,value; unsigned int bit; mii_pre_st(); // PRE+ST mii_serial_in(1); // OP mii_serial_in(0); for (i=0;i<5;i++) { // PHYAD bit= ((phyad>>(4-i)) & 0x01) ? 1 :0 ; mii_serial_in(bit); } for (i=0;i<5;i++) { // REGAD bit= ((regad>>(4-i)) & 0x01) ? 1 :0 ; mii_serial_in(bit); } mii_serial_out(); // TA_Z if((bit=mii_serial_out()) !=0 ) // TA_0
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return(FAIL); value=0; for (i=0;i<16;i++) { bit=mii_serial_out(); value += bit<<15-i ; } mii_serial_in(0); mii_serial_in(0); return(value); } /****************************************** * Write MII register * phyad -> physical address * regad -> register address * value -> value to be write ***************************************** */ mii_write(phyad,regad,value) unsigned char phyad,regad; unsigned int value; // READ DATA
// dumy clock // dumy clock
{ unsigned int i; char bit; mii_pre_st(); mii_serial_in(0); mii_serial_in(1);
// PRE+ST // OP
for (i=0;i<5;i++) { // PHYAD bit= ((phyad>>(4-i)) & 0x01) ? 1 :0 ; mii_serial_in(bit); } for (i=0;i<5;i++) { // REGAD bit= ((regad>>(4-i)) & 0x01) ? 1 :0 ; mii_serial_in(bit); } mii_serial_in(1); mii_serial_in(0); // TA_1 // TA_0
for (i=0;i<16;i++) { // OUT DATA bit= ((value>>(15-i)) & 0x01) ? 1 : 0 ; mii_serial_in(bit); } mii_serial_in(0); // dumy clock mii_serial_in(0); // dumy clock } /*************************************** * preamble + ST ***************************************/
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MX98713
mii_pre_st() { unsigned char i; NIC_write_reg(&csr9,(unsigned long)0x02000); // SWO+~SSR for(i=0;i<32;i++) // PREAMBLE mii_serial_in(1); mii_serial_in(0); // ST mii_serial_in(1); } /* **************************************************************** * Inject a bit to NWay register through CSR9_MDC,MDIO *******************************************************************/ mii_serial_in(char bit_MDO) // inject data into mii PHY { if(bit_MDO){ NIC_write_reg(&csr9,(unsigned long)0xfff02000 | CSR9_MDO);// SWO NIC_write_reg(&csr9,(unsigned long)0xfff12000 | CSR9_MDO);// MDC+SWO NIC_write_reg(&csr9,(unsigned long)0xfff02000 | CSR9_MDO);// SWO } else{ NIC_write_reg(&csr9,(unsigned long)0xfff02000 );// SWO NIC_write_reg(&csr9,(unsigned long)0xfff12000 );// MDC+SWO NIC_write_reg(&csr9,(unsigned long)0xfff02000 );// SWO } }
/********************************************************************** * read a bit from NWay register through CSR9_MDC,MDIO ***********************************************************************/ mii_serial_out() // read data from mii PHY { unsigned int bit_MDI; NIC_write_reg(&csr9,CSR9_MMD|CSR9_SRO ); // MMD+SRO NIC_read_reg (&csr9); NIC_write_reg(&csr9,CSR9_MMD|CSR9_SRO|CSR9_MDC); // MD+MDC+SRO NIC_write_reg(&csr9,CSR9_MMD|CSR9_SRO ); // MMD+SRO bit_MDI = (csr9.value & CSR9_MDI) ? 1 : 0 ; return(bit_MDI); }
7. RECOMMENDATION OF POWER SUPPLY CONNECTION
The recommended power supply schematic is shown in Figure 8. The GND indicates a direct connection to the ground plane. The VCC indicates a direct connection to the power plane.
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MACRONIX INTERNATIONAL CO., LTD.
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